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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.

6SR25 30mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 25 Tooth

£40.99 - £40.99
£40.99
£40.99 - £40.99
£40.99

Roller Chain Sprocket 12B 6SR25 30mm Bore Key & 2 Set Screws 3/4" Pitch 25 ToothChain Pitch:12B-1Number of Teeth:25Bore & Keyway(mm):30mmMf...

View full details
£40.99 - £40.99
£40.99
£40.99 - £40.99
£40.99

6SR25 28mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 25 Tooth

£52.24 - £52.24
£52.24
£52.24 - £52.24
£52.24

Roller Chain Sprocket 12B 6SR25 28mm Bore Key & 2 Set Screws 3/4" Pitch 25 ToothChain Pitch:12B-1Number of Teeth:25Bore & Keyway(mm):28mmMf...

View full details
£52.24 - £52.24
£52.24
£52.24 - £52.24
£52.24

6SR25 25mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 25 Tooth

£40.99 - £40.99
£40.99
£40.99 - £40.99
£40.99

Roller Chain Sprocket 12B 6SR25 25mm Bore Key & 2 Set Screws 3/4" Pitch 25 ToothChain Pitch:12B-1Number of Teeth:25Bore & Keyway(mm):25mmMf...

View full details
£40.99 - £40.99
£40.99
£40.99 - £40.99
£40.99

6SR24 50mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 50mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):50mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 48mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 48mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):48mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 45mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 45mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):45mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 42mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 42mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):42mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 40mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 40mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):40mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 38mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 38mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):38mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 35mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 35mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):35mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 32mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 32mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):32mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 30mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 30mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):30mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR24 28mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 24 Tooth

£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

Roller Chain Sprocket 12B 6SR24 28mm Bore Key & 2 Set Screws 3/4" Pitch 24 ToothChain Pitch:12B-1Number of Teeth:24Bore & Keyway(mm):28mmMf...

View full details
£39.64 - £39.64
£39.64
£39.64 - £39.64
£39.64

6SR23 50mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 50mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):50mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 48mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 48mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):48mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 45mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 45mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):45mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 42mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 42mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):42mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 40mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 40mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):40mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 38mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 38mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):38mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 35mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 35mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):35mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 32mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 32mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):32mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 30mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 30mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):30mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR23 28mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 23 Tooth

£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

Roller Chain Sprocket 12B 6SR23 28mm Bore Key & 2 Set Screws 3/4" Pitch 23 ToothChain Pitch:12B-1Number of Teeth:23Bore & Keyway(mm):28mmMf...

View full details
£39.48 - £39.48
£39.48
£39.48 - £39.48
£39.48

6SR21 50mm Bore, Keyway & Grub Screws Roller Chain Sprocket 3/4" Pitch 21 Tooth

£34.41 - £34.41
£34.41
£34.41 - £34.41
£34.41

Roller Chain Sprocket 12B 6SR21 50mm Bore Key & 2 Set Screws 3/4" Pitch 21 ToothChain Pitch:12B-1Number of Teeth:21Bore & Keyway(mm):50mmMf...

View full details
£34.41 - £34.41
£34.41
£34.41 - £34.41
£34.41

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