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31290 SKU No.
28 mm Bore
42B20H ISO 08B-1 Sprocket 20 Hardened Teeth ISO No. 08B-1 Steel Hub Sprocket
For Ametric® No. 42 Single Strand Chain with
12.7mm Pitch
7.75mm Roller Width
8.51mm Roller Dia.
7mm (B1)
86 mm OD (Approx) (de)
64 mm Hub Dia. (dn)
28 mm (A)
020 Teeth
Steel with Hardened Teeth
28 mm H8 bore, 8x3.3 keyway M8 screw hole over keyway and at 90°
0.76 kg