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

Mechanical Components | Engineering Hardware

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

Roller Chain

  • 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.

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