Finer PT 80A1-25PB Pilot Bore Sprocket – ASA 80-1 Simplex – 1″ Pitch – 25 Teeth

The Finer PT 80A1-25PB is a 25 tooth pilot bore sprocket for ASA 80-1 simplex roller chain – 1″ (25.4mm) pitch. It has a 202.72mm pitch circle diameter (PCD) and a 215mm outside diameter. It comes with a 20mm 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): 110 mm
• Overall length (A): 50 mm
• Tooth width (B1): 14.6 mm
• Tooth radius (r3): 27 mm
• Radius width (C): 3.2 mm
• Chain: 1″ (25.4 mm) pitch – 15.88 mm inside width – 15.88 mm roller diameter

BS / ASA interchange (1″ pitch – BS 16B-1 and ASA 80-1): ASA sprockets will wrap BS chain – BS sprockets will not wrap ASA chain unless the teeth have been skimmed. Take care if using several ASA sprockets on BS chain.

Please note: this pilot bore sprocket is supplied with a 20mm pilot bore – it is not finish bored.

Downloads:

• Finer PT ASA 80 Pilot Bore Sprockets Spec Sheet (PDF)
• Finer PT Sprockets BS / ASA Interchange Chart (PDF)

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