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Pilot Bore Sprockets – 3/4” Pitch Roller Chain Sprockets

Here at Bolton Engineering Products Ltd we stock a full range of pilot bore sprockets, for dependable effective power transmission in industrial conveyor and mechanical drive applications.

by the plastic roller sleeves which reduce noise and protection from other accidental damage, our 3/4 pitch industry standard roller chain sprockets are built to British Standard as is a sign of quality you can trust.

If you’re in need of one off pilot bore or volume quantities for OEM accounts, BEP Ltd provides excellent value and precision manufactured components.

What Is a Pilot Bore Sprocket?

A pilot bore sprocket (also known as a rough stock bore sprocket) is supplied with an oversized or unfinished bore, allowing the user to machine it to the exact shaft size required.

  • This makes it a versatile solution for engineers needing:
  • Custom bore sizes
  • Keyways or set screw modifications
  • Fitment to bushings, hubs, or custom shafts

Pilot bore sprockets are widely used in:

  • Manufacturing machinery
  • Agricultural equipment
  • Material handling and conveyors
  • Bicycles, motorcycles, and chain-driven vehicles

Technical Specifications

Specification

Details

Product Type

Pilot Bore Sprocket (Rough Stock Bore)

Chain Pitch

3/4” Pitch Roller Chain (BS Standard)

Tooth Options

10 – 50+ Teeth Available

Material

Steel / Hardened Steel

Bore Type

Pilot Bore (Machinable to Customer Specification)

Mounting Options

Direct Shaft Mount / Hub / Bushing

Tooth Profile

British Standard (BS Sprockets)

Applications

Industrial Drives, Machinery, Conveyors, Agricultural

Finish

Phosphate, Black Oxide, or Untreated (Depending Model)

Key Features & Benefits

  • Machinable Bore: Machine the bore to your precise specifications.
  • BS-Standard Compatibility: Suitable for BS roller chain, perfect matching.
  • Strong Material: Constructed of sturdy and durable steel material for long use life.
  • Various Sizes - everything from small sprockets to heavy-duty models for big chain drives.
  • Quick UK Delivery: We have lots of stock and we dispatch the same working day.

Why Choose Bolton Engineering Products Ltd?

As a trusted UK supplier of pilot bore sprockets, BEP Ltd offers:

  • Extensive stock of BS sprockets for 3/4 pitch roller chains
  • Competitive pricing with bulk-order discounts
  • High-quality sprockets sourced from reliable manufacturers
  • Expert support to help you choose the right sprocket for your application
  • Easy online ordering and fast nationwide delivery

Whether you’re replacing worn components or building a new chain-drive system, we ensure you get the right pilot bore sprocket every time.

FAQs

Q1: What is a pilot bore sprocket used for?

It allows the user to customize the bore and keyway for specific shaft or hub sizes, making it highly versatile in machinery and chain drive systems.

Q2: Are these sprockets compatible with BS roller chains?

Yes. Our sprockets are manufactured to BS standards, suitable for 3/4 pitch roller chains.

Q3: Can I request machining for the bore or keyway?

Yes. We can supply pilot bore sprockets as-is or can assist with machining recommendations.

Q4: Do you offer large quantities for OEM or industrial use?

Absolutely. Bulk purchasing options and trade pricing are available.

Roller Chain Pilot Bore Sprockets - 3/4

Pilot Bore Sprockets – 3/4” Pitch Roller Chain Sprockets

Here at Bolton Engineering Products Ltd we stock a full range of pilot bore sprockets, for dependable effective power transmission in industrial conveyor and mechanical drive applications.

by the plastic roller sleeves which reduce noise and protection from other accidental damage, our 3/4 pitch industry standard roller chain sprockets are built to British Standard as is a sign of quality you can trust.

If you’re in need of one off pilot bore or volume quantities for OEM accounts, BEP Ltd provides excellent value and precision manufactured components.

What Is a Pilot Bore Sprocket?

A pilot bore sprocket (also known as a rough stock bore sprocket) is supplied with an oversized or unfinished bore, allowing the user to machine it to the exact shaft size required.

  • This makes it a versatile solution for engineers needing:
  • Custom bore sizes
  • Keyways or set screw modifications
  • Fitment to bushings, hubs, or custom shafts

Pilot bore sprockets are widely used in:

  • Manufacturing machinery
  • Agricultural equipment
  • Material handling and conveyors
  • Bicycles, motorcycles, and chain-driven vehicles

Technical Specifications

Specification

Details

Product Type

Pilot Bore Sprocket (Rough Stock Bore)

Chain Pitch

3/4” Pitch Roller Chain (BS Standard)

Tooth Options

10 – 50+ Teeth Available

Material

Steel / Hardened Steel

Bore Type

Pilot Bore (Machinable to Customer Specification)

Mounting Options

Direct Shaft Mount / Hub / Bushing

Tooth Profile

British Standard (BS Sprockets)

Applications

Industrial Drives, Machinery, Conveyors, Agricultural

Finish

Phosphate, Black Oxide, or Untreated (Depending Model)

Key Features & Benefits

  • Machinable Bore: Machine the bore to your precise specifications.
  • BS-Standard Compatibility: Suitable for BS roller chain, perfect matching.
  • Strong Material: Constructed of sturdy and durable steel material for long use life.
  • Various Sizes - everything from small sprockets to heavy-duty models for big chain drives.
  • Quick UK Delivery: We have lots of stock and we dispatch the same working day.

Why Choose Bolton Engineering Products Ltd?

As a trusted UK supplier of pilot bore sprockets, BEP Ltd offers:

  • Extensive stock of BS sprockets for 3/4 pitch roller chains
  • Competitive pricing with bulk-order discounts
  • High-quality sprockets sourced from reliable manufacturers
  • Expert support to help you choose the right sprocket for your application
  • Easy online ordering and fast nationwide delivery

Whether you’re replacing worn components or building a new chain-drive system, we ensure you get the right pilot bore sprocket every time.

FAQs

Q1: What is a pilot bore sprocket used for?

It allows the user to customize the bore and keyway for specific shaft or hub sizes, making it highly versatile in machinery and chain drive systems.

Q2: Are these sprockets compatible with BS roller chains?

Yes. Our sprockets are manufactured to BS standards, suitable for 3/4 pitch roller chains.

Q3: Can I request machining for the bore or keyway?

Yes. We can supply pilot bore sprockets as-is or can assist with machining recommendations.

Q4: Do you offer large quantities for OEM or industrial use?

Absolutely. Bulk purchasing options and trade pricing are available.

6tr10-pilot-bore-12b-3-4-pitch-sprocket

6TR10 (12B-3-10) - BS Triplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 10 Tooth

£9.00 - £9.00
£9.00
£9.00 - £9.00
£9.00

6TR10 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-3 Triplex Chain Part Number 6TR10 Pitch 3/4 Teeth 10 Outside Dia (mm) 69...

View full details
£9.00 - £9.00
£9.00
£9.00 - £9.00
£9.00
6tr09-pilot-bore-12b-3-4-pitch-sprocket

6TR09 (12B-3-09) - BS Triplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 9 Tooth

£6.55 - £6.55
£6.55
£6.55 - £6.55
£6.55

6TR09 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-3 Triplex Chain Part Number 6TR09 Pitch 3/4 Teeth 9 Outside Dia (mm) 62 ...

View full details
£6.55 - £6.55
£6.55
£6.55 - £6.55
£6.55
6tr08-pilot-bore-12b-3-4-pitch-sprocket

6TR08 (12B-3-08) - BS Triplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 8 Tooth

£6.73 - £6.73
£6.73
£6.73 - £6.73
£6.73

6TR08 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-3 Triplex Chain Part Number 6TR08 Pitch 3/4 Teeth 8 Outside Dia (mm) 57.6 ...

View full details
£6.73 - £6.73
£6.73
£6.73 - £6.73
£6.73
6dr95-pilot-bore-12b-3-4-pitch-sprocket

6DR95 (12B-2-95) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 95 Tooth

£303.24 - £303.24
£303.24
£303.24 - £303.24
£303.24

6DR95 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR95 Pitch 3/4 Teeth 95 Outside Dia (mm) 585.1...

View full details
£303.24 - £303.24
£303.24
£303.24 - £303.24
£303.24
6dr76-pilot-bore-12b-3-4-pitch-sprocket

6DR76 (12B-2-76) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 76 Tooth

£203.33 - £203.33
£203.33
£203.33 - £203.33
£203.33

6DR76 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR76 Pitch 3/4 Teeth 76 Outside Dia (mm) 469.9...

View full details
£203.33 - £203.33
£203.33
£203.33 - £203.33
£203.33
6dr57-pilot-bore-12b-3-4-pitch-sprocket

6DR57 (12B-2-57) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 57 Tooth

£119.77 - £119.77
£119.77
£119.77 - £119.77
£119.77

6DR57 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR57 Pitch 3/4 Teeth 57 Outside Dia (mm) 355.4...

View full details
£119.77 - £119.77
£119.77
£119.77 - £119.77
£119.77
6dr45-pilot-bore-12b-3-4-pitch-sprocket

6DR45 (12B-2-45) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 45 Tooth

£79.54 - £79.54
£79.54
£79.54 - £79.54
£79.54

6DR45 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR45 Pitch 3/4 Teeth 45 Outside Dia (mm) 282.5...

View full details
£79.54 - £79.54
£79.54
£79.54 - £79.54
£79.54
6dr40-pilot-bore-12b-3-4-pitch-sprocket

6DR40 (12B-2-40) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 40 Tooth

£58.77 - £58.77
£58.77
£58.77 - £58.77
£58.77

6DR40 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR40 Pitch 3/4 Teeth 40 Outside Dia (mm) 251.3...

View full details
£58.77 - £58.77
£58.77
£58.77 - £58.77
£58.77
6dr39-pilot-bore-12b-3-4-pitch-sprocket

6DR39 (12B-2-39) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 39 Tooth

£56.32 - £56.32
£56.32
£56.32 - £56.32
£56.32

6DR39 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR39 Pitch 3/4 Teeth 39 Outside Dia (mm) 245.1...

View full details
£56.32 - £56.32
£56.32
£56.32 - £56.32
£56.32
6dr38-pilot-bore-12b-3-4-pitch-sprocket

6DR38 (12B-2-38) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 38 Tooth

£53.89 - £53.89
£53.89
£53.89 - £53.89
£53.89

6DR38 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR38 Pitch 3/4 Teeth 38 Outside Dia (mm) 239 ...

View full details
£53.89 - £53.89
£53.89
£53.89 - £53.89
£53.89
6dr37-pilot-bore-12b-3-4-pitch-sprocket

6DR37 (12B-2-37) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 37 Tooth

£51.60 - £51.60
£51.60
£51.60 - £51.60
£51.60

6DR37 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR37 Pitch 3/4 Teeth 37 Outside Dia (mm) 232.9...

View full details
£51.60 - £51.60
£51.60
£51.60 - £51.60
£51.60
6dr36-pilot-bore-12b-3-4-pitch-sprocket

6DR36 (12B-2-36) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 36 Tooth

£49.32 - £49.32
£49.32
£49.32 - £49.32
£49.32

6DR36 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR36 Pitch 3/4 Teeth 36 Outside Dia (mm) 226.8...

View full details
£49.32 - £49.32
£49.32
£49.32 - £49.32
£49.32
6dr35-pilot-bore-12b-3-4-pitch-sprocket

6DR35 (12B-2-35) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 35 Tooth

£47.34 - £47.34
£47.34
£47.34 - £47.34
£47.34

6DR35 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR35 Pitch 3/4 Teeth 35 Outside Dia (mm) 221 O...

View full details
£47.34 - £47.34
£47.34
£47.34 - £47.34
£47.34
6dr34-pilot-bore-12b-3-4-pitch-sprocket

6DR34 (12B-2-34) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 34 Tooth

£45.08 - £45.08
£45.08
£45.08 - £45.08
£45.08

6DR34 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR34 Pitch 3/4 Teeth 34 Outside Dia (mm) 214.6 ...

View full details
£45.08 - £45.08
£45.08
£45.08 - £45.08
£45.08
6dr33-pilot-bore-12b-3-4-pitch-sprocket

6DR33 (12B-2-33) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 33 Tooth

£43.36 - £43.36
£43.36
£43.36 - £43.36
£43.36

6DR33 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR33 Pitch 3/4 Teeth 33 Outside Dia (mm) 209.3 ...

View full details
£43.36 - £43.36
£43.36
£43.36 - £43.36
£43.36
6dr32-pilot-bore-12b-3-4-pitch-sprocket

6DR32 (12B-2-32) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 32 Tooth

£41.43 - £41.43
£41.43
£41.43 - £41.43
£41.43

6DR32 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR32 Pitch 3/4 Teeth 32 Outside Dia (mm) 203.3 ...

View full details
£41.43 - £41.43
£41.43
£41.43 - £41.43
£41.43
6dr31-pilot-bore-12b-3-4-pitch-sprocket

6DR31 (12B-2-31) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 31 Tooth

£39.03 - £39.03
£39.03
£39.03 - £39.03
£39.03

6DR31 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR31 Pitch 3/4 Teeth 31 Outside Dia (mm) 196.3 ...

View full details
£39.03 - £39.03
£39.03
£39.03 - £39.03
£39.03
6dr29-pilot-bore-12b-3-4-pitch-sprocket

6DR29 (12B-2-29) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 29 Tooth

£33.96 - £33.96
£33.96
£33.96 - £33.96
£33.96

6DR29 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR29 Pitch 3/4 Teeth 29 Outside Dia (mm) 184.1 ...

View full details
£33.96 - £33.96
£33.96
£33.96 - £33.96
£33.96
6dr28-pilot-bore-12b-3-4-pitch-sprocket

6DR28 (12B-2-28) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 28 Tooth

£32.19 - £32.19
£32.19
£32.19 - £32.19
£32.19

6DR28 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR28 Pitch 3/4 Teeth 28 Outside Dia (mm) 178 O...

View full details
£32.19 - £32.19
£32.19
£32.19 - £32.19
£32.19
6dr26-pilot-bore-12b-3-4-pitch-sprocket

6DR26 (12B-2-26) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 26 Tooth

£28.70 - £28.70
£28.70
£28.70 - £28.70
£28.70

6DR26 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR26 Pitch 3/4 Teeth 26 Outside Dia (mm) 165.9 ...

View full details
£28.70 - £28.70
£28.70
£28.70 - £28.70
£28.70
6dr25-pilot-bore-12b-3-4-pitch-sprocket

6DR25 (12B-2-25) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 25 Tooth

£27.22 - £27.22
£27.22
£27.22 - £27.22
£27.22

6DR25 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR25 Pitch 3/4 Teeth 25 Outside Dia (mm) 160 O...

View full details
£27.22 - £27.22
£27.22
£27.22 - £27.22
£27.22
6dr24-pilot-bore-12b-3-4-pitch-sprocket

6DR24 (12B-2-24) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 24 Tooth

£24.70 - £24.70
£24.70
£24.70 - £24.70
£24.70

6DR24 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR24 Pitch 3/4 Teeth 24 Outside Dia (mm) 153.9 ...

View full details
£24.70 - £24.70
£24.70
£24.70 - £24.70
£24.70
6dr23-pilot-bore-12b-3-4-pitch-sprocket

6DR23 (12B-2-23) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 23 Tooth

£23.41 - £23.41
£23.41
£23.41 - £23.41
£23.41

6DR23 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR23 Pitch 3/4 Teeth 23 Outside Dia (mm) 149 O...

View full details
£23.41 - £23.41
£23.41
£23.41 - £23.41
£23.41
6dr22-pilot-bore-12b-3-4-pitch-sprocket

6DR22 (12B-2-22) - BS Duplex Roller Chain Sprocket Pilot Bore 12B 3/4" - 22 Tooth

£20.96 - £20.96
£20.96
£20.96 - £20.96
£20.96

6DR22 Pilot Bore 12B 3/4" Pitch Sprocket For use with 12B-2 Duplex Chain Part Number 6DR22 Pitch 3/4 Teeth 22 Outside Dia (mm) 141.8 ...

View full details
£20.96 - £20.96
£20.96
£20.96 - £20.96
£20.96

Hi. Need any help?