Finer PT 35A1-21PB Pilot Bore Sprocket – ASA 35-1 Simplex – 3/8″ Pitch – 21 Teeth

The Finer PT 35A1-21PB is a 21 tooth pilot bore sprocket for ASA 35-1 simplex roller chain – 3/8″ (9.53mm) pitch. It has a 63.91mm pitch circle diameter (PCD) and a 67.6mm outside diameter. It comes with a 12mm 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): 48 mm
• Overall length (A): 28 mm
• Tooth width (B1): 4.3 mm
• Tooth radius (r3): 10 mm
• Radius width (C): 1.2 mm
• Approx. weight: 0.36 kg
• Chain: 3/8″ (9.53 mm) pitch – 4.77 mm inside width – 5.08 mm roller diameter

BS / ASA interchange (3/8″ pitch – BS 06B-1 and ASA 35-1): BS and ASA are not interchangeable at all.

Please note: this pilot bore sprocket is supplied with a 12mm pilot bore – it is not finish bored.

Downloads:

• Finer PT ASA 35 Pilot Bore Sprockets Spec Sheet (PDF)
• Finer PT Sprockets BS / ASA Interchange Chart (PDF)

Supplied by Finer Power Transmissions.