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Roller Chain Dimensions Table per. ASME/ANSI B29.1M

Mechanical Components | Engineering Hardware

Roller Chain Dimensions per. ASME/ANSI B29.1M

• All dimensions are in inches.
• Roller Diameters Dr are approximately 5⁄8 P.
• The width W is defined as the distance between the link plates. It is approximately 5⁄8 of the chain
  pitch.
• Pin Diameters Dp are approximately 5⁄16 P or 1⁄2 of the roller diameter.
• Thickness LPT of Inside and Outside Link Plates for the standard series is approximately 1⁄8 P.
• Thickness of Link Plates for the heavy series of any pitch is approximately that of the next larger
• pitch Standard Series chain.
• Maximum Height of Roller Link Plates = 0.95 P.
• Maximum Height of Pin Link Plates = 0.82 P.
• Maximum Pin Diameter = nominal pin diameter + 0.0005 inch.
• Minimum Hole in Bushing = nominal pin diameter + 0.0015 inch.
• Maximum Width of Roller Link = nominal width of chain + (2.12 × nominal link plate thickness.)
• Minimum Distance between Pin Link Plates = maximum width of roller link + 0.002 inch.

Pitch P	Max. Roller Diameter Dr	Standard Chain No.	Width W	Standard Chain Series			Heavy Series
				Pin Diameter Dp	Thickness of Link Plates LPT	Measuring Load, † Lb.	Thickness of Link Plates LPT
0.250	0.130 a	25	0.125	0.0905	0.030	18	…
0.375	0.200 a	35	0.188	0.141	0.050	18	…
0.500	0.306	41	0.250	0.141	0.050	18	…
0.500	0.312	40	0.312	0.156	0.060	31	…
0.625	0.400	50	0.375	0.200	0.080	49	…
0.750	0.469	60	0.500	0.234	0.094	70	0.125
1.000	0.625	80	0.625	0.312	0.125	125	0.156
1.250	0.750	100	0.750	0.375	0.156	195	0.187
1.500	0.875	120	1.000	0.437	0.187	281	0.219
1.750	1.000	140	1.000	0.500	0.219	383	0.250
2.000	1.125	160	1.250	0.562	0.250	500	0.281
2.250	1.406	180	1.406	0.687	0.281	633	0.312
2.500	1.562	200	1.500	0.781	0.312	781	0.375
3.000	1.875	240	1.875	0.937	0.375	1000	0.500

a Bushing diameter. This size chain has no rollers.