Finer PT 120A1-9PB Pilot Bore Sprocket – ASA 120-1 Simplex – 1-1/2″ Pitch – 9 Teeth

The Finer PT 120A1-9PB is a 9 tooth pilot bore sprocket for ASA 120-1 simplex roller chain – 1-1/2″ (38.1mm) pitch. It has a 111.4mm pitch circle diameter (PCD) and a 130.88mm 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): 70 mm
• Overall length (A): 45 mm
• Tooth radius (r3): 40.5 mm
• Radius width (C): 4.8 mm
• Chain: 1-1/2″ (38.1 mm) pitch – 25.4 mm inside width – 22.23 mm roller diameter

BS / ASA interchange (1-1/2″ pitch – BS 24B-1 and ASA 120-1): BS sprockets will wrap ASA chain (not recommended for frequent forward/reverse indexing) but ASA sprockets may need to have the teeth skimmed to wrap BS chain – the plate thickness differs.

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

Downloads:

• Finer PT ASA 120 Pilot Bore Sprockets Spec Sheet (PDF)
• Finer PT Sprockets BS / ASA Interchange Chart (PDF)

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