Collection: Bore Reducers

There are 13 products in the sub-categories of Bore Reducers. Browse the Bore Reducers products table.

Category Details

A selection of Bore Reducers. Inch to Metric / Inch to Inch / Metric to Metric. Brass reducing bushes.

  • This category will be discontinued when this item is sold.
  • All items are priced to quit.
  • Backorders or orders for previously listed items in the category may still be possible - please enquire.
  • S = Recommended set screw positions.
  • C = Recommended position for single set screw fastening.
  • T = Recommended position for tangential screw in clamp hub.
Bore Reducers

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Bore Reducers category on the Small Parts & Bearings online store.
Outside Diameter (d) Inside Diameter (D) Length (L) Indicative
Image
Outside Diameter (d)
5.00
mm
+ 0.03 / - 0.05
(Equiv. 0.197 in.)
Inside Diameter (D)
3.18
mm
+ 0.03 / - 0.00
(Equiv. 0.125 in.)
Length (L)
4.3
mm

(Equiv. 0.169 in.)
Bore Reducers - 5x3.18x4.3 mm - Brass
Material: Brass    End Lip: Yes   
Part Number: RB-050-032-F-043-B (2 Pcs)
Bore Reducers - 5x3.18x4.3 mm - Brass Reducer
1 pack (2 pcs) Available Now | Item Discontinued - Up to 1 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
Per 2
Quantity Required

1 pack (2 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d) Inside Diameter (D) Length (L) Indicative
Image
Outside Diameter (d)
5.00
mm
+ 0.03 / - 0.05
(Equiv. 0.197 in.)
Inside Diameter (D)
3.18
mm
+ 0.03 / - 0.00
(Equiv. 0.125 in.)
Length (L)
4.3
mm

(Equiv. 0.169 in.)
Bore Reducers - 5x3.18x4.3 mm - Brass
Material: Brass    End Lip: Yes   
Part Number: RB-050-032-F-043-B (2 Pcs)
Bore Reducers - 5x3.18x4.3 mm - Brass Reducer
1 pack (2 pcs) Available Now | Item Discontinued - Up to 1 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
Per 2
Quantity Required

1 pack (2 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
5.00
mm
+ 0.03 / - 0.05
(Equiv. 0.197 in.)
Inside Diameter (D)
4.00
mm
+ 0.03 / - 0.00
(Equiv. 0.157 in.)
Length (L)
4.3
mm

(Equiv. 0.169 in.)
Bore Reducers - 5x4x4.3 mm - Brass
Material: Brass    End Lip: Yes   
Part Number: RB-050-040-F-043-B (3 Pcs)
Bore Reducers - 5x4x4.3 mm - Brass Reducer
1 pack (3 pcs) Available Now | Item Discontinued - Up to 1 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
Per 3
Quantity Required

1 pack (3 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
5.00
mm
+ 0.03 / - 0.05
(Equiv. 0.197 in.)
Inside Diameter (D)
4.00
mm
+ 0.03 / - 0.00
(Equiv. 0.157 in.)
Length (L)
4.3
mm

(Equiv. 0.169 in.)
Bore Reducers - 5x4x4.3 mm - Brass
Material: Brass    End Lip: Yes   
Part Number: RB-050-040-F-043-B (3 Pcs)
Bore Reducers - 5x4x4.3 mm - Brass Reducer
1 pack (3 pcs) Available Now | Item Discontinued - Up to 1 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
Per 3
Quantity Required

1 pack (3 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.00
mm
+ 0.013 / - 0.025
(Equiv. 0.236 in.)
Inside Diameter (D)
3.00
mm
+ 0.025 / 0.000
(Equiv. 0.118 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6x3x9 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-060-030-090-A
Bore Reducers - 6x3x9 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $9.00 AUD
Regular price $17.10 AUD Sale price $9.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.00
mm
+ 0.013 / - 0.025
(Equiv. 0.236 in.)
Inside Diameter (D)
3.00
mm
+ 0.025 / 0.000
(Equiv. 0.118 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6x3x9 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-060-030-090-A
Bore Reducers - 6x3x9 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $9.00 AUD
Regular price $17.10 AUD Sale price $9.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
3.00
mm
+ 0.025 / 0.000
(Equiv. 0.118 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 6.35x3x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-030-120-A
Bore Reducers - 6.35x3x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
3.00
mm
+ 0.025 / 0.000
(Equiv. 0.118 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 6.35x3x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-030-120-A
Bore Reducers - 6.35x3x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
3.18
mm
+ 0.025 / 0.000
(Equiv. 0.125 in.)
Length (L)
9.5
mm

(Equiv. 0.374 in.)
Bore Reducers - 6.35x3.18x9.5 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-032-095-A
Bore Reducers - 6.35x3.18x9.5 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
3.18
mm
+ 0.025 / 0.000
(Equiv. 0.125 in.)
Length (L)
9.5
mm

(Equiv. 0.374 in.)
Bore Reducers - 6.35x3.18x9.5 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-032-095-A
Bore Reducers - 6.35x3.18x9.5 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
4.00
mm
+ 0.025 / 0.000
(Equiv. 0.157 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6.35x4x9 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-040-090-A
Bore Reducers - 6.35x4x9 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $7.00 AUD
Regular price $13.30 AUD Sale price $7.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
4.00
mm
+ 0.025 / 0.000
(Equiv. 0.157 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6.35x4x9 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-064-040-090-A
Bore Reducers - 6.35x4x9 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $7.00 AUD
Regular price $13.30 AUD Sale price $7.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6.35x6x9 mm - Brass
Material: Brass    End Lip: No   
Part Number: RB-064-060-090-B
Bore Reducers - 6.35x6x9 mm - Brass Reducer
5 Available Now | Item Discontinued - Up to 5 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
Quantity Required

5 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
6.35
mm
+ 0.013 / - 0.000
(Equiv. 0.25 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
9.0
mm

(Equiv. 0.354 in.)
Bore Reducers - 6.35x6x9 mm - Brass
Material: Brass    End Lip: No   
Part Number: RB-064-060-090-B
Bore Reducers - 6.35x6x9 mm - Brass Reducer
5 Available Now | Item Discontinued - Up to 5 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
Quantity Required

5 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
9.53
mm
+ 0.013 / - 0.000
(Equiv. 0.375 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 9.53x6x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-095-060-120-A
Bore Reducers - 9.53x6x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 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
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
9.53
mm
+ 0.013 / - 0.000
(Equiv. 0.375 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 9.53x6x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-095-060-120-A
Bore Reducers - 9.53x6x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 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
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
9.53
mm
+ 0.013 / - 0.000
(Equiv. 0.375 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
19.0
mm

(Equiv. 0.748 in.)
Bore Reducers - 9.53x6x19 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-095-060-190-A
Bore Reducers - 9.53x6x19 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $9.00 AUD
Regular price $17.10 AUD Sale price $9.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
9.53
mm
+ 0.013 / - 0.000
(Equiv. 0.375 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
19.0
mm

(Equiv. 0.748 in.)
Bore Reducers - 9.53x6x19 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-095-060-190-A
Bore Reducers - 9.53x6x19 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $9.00 AUD
Regular price $17.10 AUD Sale price $9.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.013 / - 0.025
(Equiv. 0.394 in.)
Inside Diameter (D)
5.00
mm
+ 0.025 / 0.000
(Equiv. 0.197 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 10x5x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-100-050-120-A
Bore Reducers - 10x5x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.013 / - 0.025
(Equiv. 0.394 in.)
Inside Diameter (D)
5.00
mm
+ 0.025 / 0.000
(Equiv. 0.197 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 10x5x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-100-050-120-A
Bore Reducers - 10x5x12 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $6.00 AUD
Regular price $11.40 AUD Sale price $6.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.013 / - 0.025
(Equiv. 0.394 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 10x6x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-100-060-120-A (2 Pcs)
Bore Reducers - 10x6x12 mm - Aluminium Alloy Reducer
1 pack (2 pcs) Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $14.00 AUD
Regular price $26.60 AUD Sale price $14.00 AUD
Per 2
Quantity Required

1 pack (2 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.013 / - 0.025
(Equiv. 0.394 in.)
Inside Diameter (D)
6.00
mm
+ 0.025 / 0.000
(Equiv. 0.236 in.)
Length (L)
12.0
mm

(Equiv. 0.472 in.)
Bore Reducers - 10x6x12 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-100-060-120-A (2 Pcs)
Bore Reducers - 10x6x12 mm - Aluminium Alloy Reducer
1 pack (2 pcs) Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $14.00 AUD
Regular price $26.60 AUD Sale price $14.00 AUD
Per 2
Quantity Required

1 pack (2 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.03 / - 0.05
(Equiv. 0.394 in.)
Inside Diameter (D)
6.35
mm
+ 0.03 / - 0.00
(Equiv. 0.25 in.)
Length (L)
8.10
mm

(Equiv. 0.319 in.)
Bore Reducers - 10x6.35x8.1 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: Yes   
Part Number: RB-100-064-F-081-A (3 Pcs)
Bore Reducers - 10x6.35x8.1 mm - Aluminium Alloy Reducer
1 pack (3 pcs) Available Now | Item Discontinued - Up to 1 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
Per 3
Quantity Required

1 pack (3 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
10.00
mm
+ 0.03 / - 0.05
(Equiv. 0.394 in.)
Inside Diameter (D)
6.35
mm
+ 0.03 / - 0.00
(Equiv. 0.25 in.)
Length (L)
8.10
mm

(Equiv. 0.319 in.)
Bore Reducers - 10x6.35x8.1 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: Yes   
Part Number: RB-100-064-F-081-A (3 Pcs)
Bore Reducers - 10x6.35x8.1 mm - Aluminium Alloy Reducer
1 pack (3 pcs) Available Now | Item Discontinued - Up to 1 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
Per 3
Quantity Required

1 pack (3 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
12.70
mm
+ 0.013 / - 0.000
(Equiv. 0.5 in.)
Inside Diameter (D)
9.53
mm
+ 0.025 / 0.000
(Equiv. 0.375 in.)
Length (L)
12.7
mm

(Equiv. 0.5 in.)
Bore Reducers - 12.7x9.53x12.7 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-127-095-127-A
Bore Reducers - 12.7x9.53x12.7 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $10.00 AUD
Regular price $19.00 AUD Sale price $10.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Outside Diameter (d)
12.70
mm
+ 0.013 / - 0.000
(Equiv. 0.5 in.)
Inside Diameter (D)
9.53
mm
+ 0.025 / 0.000
(Equiv. 0.375 in.)
Length (L)
12.7
mm

(Equiv. 0.5 in.)
Bore Reducers - 12.7x9.53x12.7 mm - Aluminium Alloy
Material: Aluminium Alloy    End Lip: No   
Part Number: RB-127-095-127-A
Bore Reducers - 12.7x9.53x12.7 mm - Aluminium Alloy Reducer
1 Available Now | Item Discontinued - Up to 1 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $10.00 AUD
Regular price $19.00 AUD Sale price $10.00 AUD
Each
Quantity Required

1 Available Now. These are priced to quit. Please contact us for a quote if you require more.