Collection: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel

Bearings -> Single Row Ball -> Unflanged -> Precision -> Chrome Steel
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
Single Row Ball Bearings - 3.5x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.500
mm

(Equiv. 0.138 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 3.5x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZ    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: MR935-ZZ-ECO (PK-10)
88 units (880 pcs) Available Now | Item Discontinued - Up to 88 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

88 units (880 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Indicative
Image
Single Row Ball Bearings - 3.5x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.500
mm

(Equiv. 0.138 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 3.5x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZ    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: MR935-ZZ-ECO (PK-10)
88 units (880 pcs) Available Now | Item Discontinued - Up to 88 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

88 units (880 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm
+ 0.000 / - 0.0075
(Equiv. 0.156 in.)
OD (D)
7.938
mm
+ 0.000 / - 0.0075
(Equiv. 0.313 in.)
Width (B)
3.175
mm
+ 0.000 / - 0.125
(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Part Number: R155A-ZZS-MC3 (PK-20)
Out of Stock | Backorder Now | Orders can be expected around Thu, Feb 12, 2026
Regular price $149.95 AUD
Regular price $179.95 AUD Sale price $149.95 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm
+ 0.000 / - 0.0075
(Equiv. 0.156 in.)
OD (D)
7.938
mm
+ 0.000 / - 0.0075
(Equiv. 0.313 in.)
Width (B)
3.175
mm
+ 0.000 / - 0.125
(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Part Number: R155A-ZZS-MC3 (PK-20)
Out of Stock | Backorder Now | Orders can be expected around Thu, Feb 12, 2026
Regular price $149.95 AUD
Regular price $179.95 AUD Sale price $149.95 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm
+ 0.000 / - 0.007
(Equiv. 0.156 in.)
OD (D)
7.938
mm
+ 0.000 / - 0.007
(Equiv. 0.313 in.)
Width (B)
3.175
mm
+ 0.000 / - 0.120
(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZS    Bearing Type: Radial   
Part Number: R155A-ZZS-MC3-JP6 (PK-20)
Out of Stock | Backorder Now | Orders can be expected around Thu, Feb 12, 2026
Regular price $149.95 AUD
Regular price $179.95 AUD Sale price $149.95 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm
+ 0.000 / - 0.007
(Equiv. 0.156 in.)
OD (D)
7.938
mm
+ 0.000 / - 0.007
(Equiv. 0.313 in.)
Width (B)
3.175
mm
+ 0.000 / - 0.120
(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZS    Bearing Type: Radial   
Part Number: R155A-ZZS-MC3-JP6 (PK-20)
Out of Stock | Backorder Now | Orders can be expected around Thu, Feb 12, 2026
Regular price $149.95 AUD
Regular price $179.95 AUD Sale price $149.95 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm

(Equiv. 0.156 in.)
OD (D)
7.938
mm

(Equiv. 0.313 in.)
Width (B)
3.175
mm

(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: TTS    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: R155A-TTS-ECO (Each)
320 Available Now | Item Discontinued - Up to 320 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.00 AUD
Regular price $5.70 AUD Sale price $3.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

320 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 3.969x7.938x3.175 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
3.969
mm

(Equiv. 0.156 in.)
OD (D)
7.938
mm

(Equiv. 0.313 in.)
Width (B)
3.175
mm

(Equiv. 0.125 in.)
Single Row Ball Bearings - 3.969x7.938x3.175 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: TTS    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: R155A-TTS-ECO (Each)
320 Available Now | Item Discontinued - Up to 320 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.00 AUD
Regular price $5.70 AUD Sale price $3.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

320 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x7x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.007
(Equiv. 0.276 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.120
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x7x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Part Number: MR74-MC3-JP6-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.007
(Equiv. 0.276 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.120
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x7x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: Open    Bearing Type: Radial   
Part Number: MR74-MC3-JP6-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.276 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.125
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x7x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: MR74-MC3-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.276 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.125
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x7x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: MR74-MC3-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
7.000
mm

(Equiv. 0.276 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR74A-ZZ-ECO (PK-5)
12 units (60 pcs) Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $7.05 AUD
Regular price Sale price $7.05 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 12 available can be backordered.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
7.000
mm

(Equiv. 0.276 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR74A-ZZ-ECO (PK-5)
12 units (60 pcs) Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $7.05 AUD
Regular price Sale price $7.05 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

12 units (60 pcs) Available Now. Backorder if more than 12.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.007
(Equiv. 0.276 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR74A-ZZS-MC3-JP6 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.007
(Equiv. 0.276 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR74A-ZZS-MC3-JP6 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $290.59 AUD
Regular price $348.71 AUD Sale price $290.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
7.000
mm

(Equiv. 0.276 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: MR74A-2RB-ECO (PK-2)
15 units (30 pcs) Available Now | Item Discontinued - Up to 15 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.39 AUD
Regular price $5.27 AUD Sale price $4.39 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

15 units (30 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
7.000
mm

(Equiv. 0.276 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: MR74A-2RB-ECO (PK-2)
15 units (30 pcs) Available Now | Item Discontinued - Up to 15 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.39 AUD
Regular price $5.27 AUD Sale price $4.39 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

15 units (30 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.276 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR74A-ZZS-MC3 (Each)
78 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 78 available can be backordered.
Single Row Ball Bearings - 4x7x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
7.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.276 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x7x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR74A-ZZS-MC3 (Each)
78 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

78 Available Now. Backorder if more than 78.
Single Row Ball Bearings - 4x8x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.125
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x8x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: MR84-MC3-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $268.59 AUD
Regular price $322.31 AUD Sale price $268.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x8x2 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
2.000
mm
+ 0.000 / - 0.125
(Equiv. 0.079 in.)
Single Row Ball Bearings - 4x8x2 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: MR84-MC3-AF12 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $268.59 AUD
Regular price $322.31 AUD Sale price $268.59 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR84A-ZZS-ECO (PK-5)
30 units (150 pcs) Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $4.23 AUD
Regular price Sale price $4.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 30 available can be backordered.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: MR84A-ZZS-ECO (PK-5)
30 units (150 pcs) Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $4.23 AUD
Regular price Sale price $4.23 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

30 units (150 pcs) Available Now. Backorder if more than 30.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR84A-ZZ-MC3-JP6 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $268.86 AUD
Regular price $322.64 AUD Sale price $268.86 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR84A-ZZ-MC3-JP6 (PK-50)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $268.86 AUD
Regular price $322.64 AUD Sale price $268.86 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR84A-ZZ-MC3 (Each)
231 Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 231 available can be backordered.
Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
8.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Part Number: MR84A-ZZ-MC3 (Each)
231 Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

231 Available Now. Backorder if more than 231.
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
5.000
mm

(Equiv. 0.197 in.)
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR84D-ZZS-ECO (Each)
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
8.000
mm

(Equiv. 0.315 in.)
Width (B)
5.000
mm

(Equiv. 0.197 in.)
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR84D-ZZS-ECO (Each)
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: 684-ZZS-ECO (Each)
19 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 19 available can be backordered.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
2.500
mm

(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: 684-ZZS-ECO (Each)
19 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

19 Available Now. Backorder if more than 19.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: 684-MC3-AF12 (Each)
1 Available Now | More stock due: 100 around Thu, Jan 15, 2026 | Further orders can be expected around Wed, Feb 11, 2026
Regular price $4.23 AUD
Regular price Sale price $4.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 1 available can be backordered.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: Open    Bearing Type: Radial   
Part Number: 684-MC3-AF12 (Each)
1 Available Now | More stock due: 100 around Thu, Jan 15, 2026 | Further orders can be expected around Wed, Feb 11, 2026
Regular price $4.23 AUD
Regular price Sale price $4.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

1 Available Now. Backorder if more than 1.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: 684D-ZZS-ECO (Each)
92 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 92 available can be backordered.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Part Number: 684D-ZZS-ECO (Each)
92 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

92 Available Now. Backorder if more than 92.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
262 Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 262 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
262 Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

262 Available Now. Backorder if more than 262.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Part Number: 684A-2RB-ECO (Each)
750 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 750 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RB    Bearing Type: Radial   
Part Number: 684A-2RB-ECO (Each)
750 Available Now | Further orders can be expected around Fri, Jan 23, 2026
Regular price $1.95 AUD
Regular price Sale price $1.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

750 Available Now. Backorder if more than 750.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.02 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: ZZS    Bearing Type: Radial   
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.02 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Part Number: 684A-ZZ-MC3 (PK-2)
251 units (502 pcs) Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 251 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1    Closure Type: ZZ    Bearing Type: Radial   
Part Number: 684A-ZZ-MC3 (PK-2)
251 units (502 pcs) Available Now | Further orders can be expected around Wed, Feb 11, 2026
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

251 units (502 pcs) Available Now. Backorder if more than 251.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Part Number: 684A-ZZ-MC3-JP6 (PK-100)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6    Closure Type: ZZ    Bearing Type: Radial   
Part Number: 684A-ZZ-MC3-JP6 (PK-100)
Out of Stock | Backorder Now | Orders can be expected around Wed, Feb 11, 2026
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RS    Bearing Type: Radial   
Part Number: 684A-2RS-ECO (Each)
Out of Stock | Backorder Now | Orders can be expected around Sun, Feb 01, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy    Closure Type: 2RS    Bearing Type: Radial   
Part Number: 684A-2RS-ECO (Each)
Out of Stock | Backorder Now | Orders can be expected around Sun, Feb 01, 2026
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.