Finer PT 16B3-21T/L Taper Lock Sprocket – 16B-3 Triplex – 1″ Pitch – 21 Teeth – 3030/3535 Bush

The Finer PT 16B3-21T/L is a 21 tooth taper lock sprocket for 16B-3 triplex British Standard roller chain – 1″ (25.4mm) pitch. It has a 170.4mm pitch circle diameter (PCD) and a 182mm outside diameter. It is available bored for a 3030 or a 3535 taper lock bush.

Taper lock sprockets locate on the shaft through a separate tapered bush. The bush carries the shaft bore and keyway – so one sprocket suits a range of shaft sizes – pulls up concentric as the screws are tightened and comes off cleanly for maintenance. All Finer sprockets are engineered in accordance with ISO 9000 standards.

Dimensions:

• Overall length (A): 79.6 mm
• Tooth radius (r3): 26 mm
• Radius width (C): 2.5 mm
• Construction type: Type 5 as drawn on the spec sheet
• Chain: 1″ (25.4 mm) pitch – 17.02 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 sprocket is listed for a 3030 or 3535 taper lock bush – the bush is not included. When requesting a quote – say which bush you need and include your shaft size.

Downloads:

• Finer PT 16B Taper Lock Sprockets Spec Sheet (PDF)
• Finer PT Sprockets BS / ASA Interchange Chart (PDF)

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