British Standard Triplex Sprockets in Carbon Steel Pilot Bore

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For British Standard Roller Chains to BS228-DIN8187-ISO606R

This Standard Range of Triplex Roller Chain Sprockets are to suit British Standard Roller Chain that conform to BS 228-Din 8187 and ISO 606R Standards. They are manufactured to the Metric European Standard having the Squared Tooth Profile and a Boss one side.

As this Standard has now been adopted throughout Europe they should be indentical and interchangable with most if not all of the other manufacutured Brands offered within the Euorpean Union.

Steel Sprockets 8-40 tooth up to 3/4″ pitch are produced in grade C45 and are suitable for Flame or Induction hardening and sizes outside this range depending on pitch and tooth size can be either C45 or FE Steel.

Looking for a size that is not listed here?

Then please check the range of tooth sizes in the Triplex Plate wheels range as these can be supplied with a Weld on Boss if required.

Need a Heavy Duty Castings?

Heavy Duty castings for applications where High Impact loads are common or when increase strength is required? then please ask our Sales Department for details of our Heavy Duty Casting range in GG25 or our Casting Service when you require an Oversize Boss or you have a Special Pattern requirement such as a Shear Pin or Split Designs.

Cast Iron Chainwheels: Grade GJL200 as standard, with increased Boss Diameter and Heavy Duty GG25 available upon request.

Range of Sizes

Note: We are continuously adding to or Extending our Ranges, hence if you cannot find it listed here, then please contact us via the ENQUIRY link on each page.

Tooth sizes in C45 Steel and are suitable for Flame Hardening – Cast Iron are in Grade GJL200 as Standard with Increased Boss Diameter & Heavy Duty Grades available on request

Alt. Shaft Fixing

As an alternative to either Boring & Keywaying a pilot bore sprocket or using a Taper bored sprocket and Bush. Why not take a look at the range of Locking Bushes we now offer, as they eliminate the need for fixing via a Keyway-Key thereby providing the added benefit of a uniform distribution of the drive load over the entire diameter of the bush.

View Range

Alternative Design Types

We have a range of alternative design types available :-

  • Weld on Boss Type
  • Weld in through Boss Type
  • Double Central Boss Type
  • Double Offset Boss Type
  • Idler Sprockets (with Bearing)
  • Larger Boss Diameter Type
  • Longer boss length Type

View alternative range.  

Heat Treatments

  • FLAME HARDEN TEETH – Without Certificate
  • INDUCTION HARDEN TEETH – With Certificate
  • CASE HARDENING – With or Without Certificate

Reworking Service

To compliment the Stock range of Products the company offers a comprehensive reworking service to modify any stock sprocket to your individual requirements.

Plating Service

A Full range of add on Plating Finishes is available :-

  • Zinc (Clear & Yellow)
  • Nickel
  • Chemically Black Phosphate
  • Hard Anodising for Aluminium Products!



Beside the Reworking Service the company offers a Full Manufacturing Service that caters for :-

  • Any requirement outside the stock range.
  • Customers own drawing requirement.
  • When a stock sprocket is not suitable.

View our manufacturing Capacity  


View our Introduction to Roller Chain Sprockets including how to Identify and how to improve the life of your drive sprockets by up to 50%. As a rough gauge we would recommend that the boss diameter should be at least 1.5 times the shaft diameter it is required to fit onto.

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