Product Features
Type A - No Hub
- Boston standard Type A sprockets are stocked for all single strand Roller Chains up to 1” Pitch (#80 Chain).
Type B - Single Hub
- Boston Steel—Type B Stock Bore sprockets are stocked for all single strand Roller Chains up to 1” Pitch (#80 Chain) and for double strand Roller Chains in 3/8, 1/2, 5/8 and 3/4” Pitches.
- Boston Stainless Steel—Type B Stock Bore sprockets are stocked for single strand Roller Chain in 1/4, 3/8, and 1/2” pitches.
- Boston Steel—Type B Bored-to-Size sprockets are stocked for single strand Roller Chain in 1/4, 3/8, 1/2, 5/8, 3/4, and 1” pitches.
- Boston Type B sprockets are solid (one piece) construction in small sizes, and two-piece design in larger numbers of teeth, see Chart
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