Martin chain #41 · E-28
41B21
Exact stock sprocket record from Martin's official Roller Chain Sprockets catalog.
Published catalog evidence
Exact source record
- Catalog number
- 41B21
- Chain designation
- 41
- Chain pitch
- 0.5"
- Number of teeth
- 21
- Material context
- all steel / stainless steel
- Sprocket style
- single Type B / Type A stock sprockets
- Published row text
- 21 41B21 3 .620 B .625 1 .875 2 .875 1 1 .81 A 41A21 .625 0 .60
Verification boundary
What still needs to match
Chain and strand countConfirm ANSI/ISO chain standard, pitch, roller width, and simplex/duplex/triplex arrangement.
Bore and hub systemVerify stock/finished bore, QD or taper-bushing size, hub style, keyway, setscrews, and shaft fit.
Material and teethConfirm steel/stainless material, hardened-tooth suffixes, corrosion requirements, and tooth count.
DutyCheck speed, horsepower, alignment, lubrication, shock loading, and current manufacturer limits.
Related catalog parts
Same chain family, nearby tooth count
Chain #4141B2020 teeth · single Type B / Type A stock sprocketsChain #4141B2222 teeth · single Type B / Type A stock sprocketsChain #4141B20SS20 teeth · single stainless stock sprocketsChain #4141B1919 teeth · single Type B / Type A stock sprocketsChain #4141B2323 teeth · single Type B / Type A stock sprocketsChain #4141B19SS19 teeth · single stainless stock sprocketsChain #4141B1818 teeth · single Type B / Type A stock sprocketsChain #4141B2424 teeth · single Type B / Type A stock sprockets