Explore BS Pilot Bore Sprockets and British Standard chain sizes 06B–24B. Australian Pulley Co. supplies quality sprockets for reliable power transmission.
Sprockets are essential components in power transmission systems, transferring rotational motion between shafts via roller chains. In Australian industrial environments, precision and correct chain compatibility are critical to ensure reliable performance and long service life, which is why BS Pilot Bore Sprockets are designed to suit British Standard roller chains and allow customised shaft machining. This guide explains British Standard chain numbers from 06B to 24B and outlines the available sprocket options from Australian Pulley Co.
Understanding British Standard Chain Numbers (06B–24B)
British Standard (BS) chain numbers refer to the dimensional specifications of roller chains, including pitch, roller diameter, and width between inner plates. The number directly corresponds to the chain pitch, which determines the matching sprocket tooth profile.
For example:
- 06B – 9.525 mm pitch (commonly used in light-duty applications)
- 08B – 12.7 mm pitch
- 10B – 15.875 mm pitch
- 12B – 19.05 mm pitch
- 16B – 25.4 mm pitch
- 20B – 31.75 mm pitch
- 24B – 38.1 mm pitch
Tsubaki Australia confirms that British Standard chains are manufactured to ISO 606 standards, ensuring interchangeability across compliant components. As the chain number increases, so do pitch and load capacity, with smaller sizes used in light-duty machinery and larger sizes suited to heavy industrial applications. Because BS and ANSI chains differ in dimensions and tooth profile, mixing them can cause premature wear and mechanical issues.
Correctly matching chain and sprocket specifications ensures:
- Smooth power transmission
- Reduced vibration and wear
- Extended operational life
- Reliable performance under load
What Are BS Pilot Bore Sprockets and How Do They Work?
BS Pilot Bore Sprockets are supplied with a pre-machined but undersized centre bore that can be finished to suit a specific shaft diameter. This pilot bore allows machinists to add keyways and set screw holes as required for secure fitment. The design provides flexibility for Australian workshops by enabling custom machining instead of stocking multiple finished bore sizes.
The main advantages include:
- Custom shaft fitment
- Accurate alignment
- Reduced inventory requirements
- Suitability for both new builds and replacements
Types of BS Sprockets Available at Australian Pulley Co.
Australian Pulley Co. supplies a comprehensive range of British Standard pilot bore bossed sprockets to suit various industrial applications. Each type is engineered for durability and reliable performance.
- 06B PB Bossed Sprockets – Designed for 06B chains, these sprockets are commonly used in light-duty conveyors, packaging equipment, and small machinery. They are compact and ideal where space is limited.
- 08B PB Bossed Sprockets – Suitable for moderate loads, 08B sprockets are widely applied in general manufacturing and materials handling systems.
- 10B PB Bossed Sprockets – A versatile mid-range option, 10B sprockets handle higher torque applications while maintaining smooth chain engagement.
- 12B PB Bossed Sprockets – Built for more demanding industrial drives, 12B sprockets provide increased strength and durability.
- 16B PB Bossed Sprockets – Common in heavy-duty agricultural and processing equipment, 16B sprockets are engineered for higher load capacities.
- 20B – 24B PB Bossed Sprockets – These larger sprockets are designed for high-load, heavy industrial environments such as mining, bulk materials handling, and major conveyor systems.
Quality BS Pilot Bore Sprockets Backed by Australian Pulley Co.
Choosing the correct sprocket is crucial for maintaining efficiency, safety and long-term performance. Australian Pulley Co. supplies a dependable range of BS Pilot Bore Sprockets to suit British Standard chain sizes from 06B to 24B. Backed by industry experience and a commitment to quality, the team provides expert guidance and tailored supply solutions for your application.
For reliable British Standard sprockets, contact us today and find the right solution for your machinery.
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