Finer PT 20B2-23PB Pilot Bore Sprocket – 20B-2 Duplex – 1-1/4″ Pitch – 23 Teeth

The Finer PT 20B2-23PB is a 23 tooth pilot bore sprocket for 20B-2 duplex British Standard roller chain – 1-1/4″ (31.75mm) pitch. It has a 233.2mm pitch circle diameter (PCD) and a 248.2mm outside diameter. It comes with a 30mm pilot bore.

A pilot bore sprocket is supplied with a small starter bore so it can be machined out to suit the shaft – keyway and set screws. Finer sprockets are made from high quality steel with induction hardened teeth – improving resistance to wear and extending working life. All Finer sprockets are engineered in accordance with ISO 9000 standards.

Dimensions:

• Hub diameter (dm): 140 mm
• Overall length (A): 80 mm
• Tooth width (B2): 54.6 mm
• Tooth radius (r3): 32 mm
• Radius width (C): 3.5 mm
• Approx. weight: 19.05 kg
• Chain: 1-1/4″ (31.75 mm) pitch – 19.56 mm inside width – 19.05 mm roller diameter

BS / ASA interchange (1-1/4″ pitch – BS 20B-1 and ASA 100-1): ASA sprockets will wrap BS chain – BS sprockets may need to have the teeth skimmed to run on ASA chain – the plate thickness differs.

Please note: this pilot bore sprocket is supplied with a 30mm pilot bore – it is not finish bored.

Downloads:

• Finer PT 20B and 24B Pilot Bore Sprockets Spec Sheet (PDF)
• Finer PT Sprockets BS / ASA Interchange Chart (PDF)

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