Leaf Chain Dimensions Chart

Leaf chain dimensions chart per ASME B29.8. A leaf chain consists of a series of link plates assembled with pins in such a way that the joint is free to articulate between adjoining pitches.

Chain Numbering: The chain carries the prefix BL. The digit at the end of chain numbering designates the number of link plates in the articulating pitch. The digit to the left this designates the number of plates in the pin link pitch. The digits to the left of those two digits denote the number of eighths of an inch in the chain pitch.

Leaf chain 2x2 lacing

Leaf chain 2x3 lacing

Leaf chain 3x4 lacing

Leaf chain 4x4 lacing

Leaf chain 4x6 lacing

Leaf chain 6x6 lacing

General Chain Dimensions, in.

Chain No. Pitch Lacing Wmax Wmax Dmax Smin Hmax Tmax
BL-422 ... 2x2 0.334 0.434 ... ... ... ...
BL-423 ... 2x3 0.418 0.518 ... ... ... ...
BL-434 ... 3x4 0.585 0.685 ... ... ... ...
BL-444 0.500 4x4 0.668 0.768 0.2004 0.2016 0.475 0.082
BL-446 ... 4x6 0.835 0.935 ... ... ... ...
BL-466 ... 6x6 1.002 1.102 ... ... ... ...
BL-522 ... 2x2 0.390 0.507 ... ... ... ...
BL-523 ... 2x3 0.488 0.605 ... ... ... ...
BL-534 ... 3x4 0.683 0.800 ... ... ... ...
BL-544  0.625 4x4 0.780 0.897 0.2346 0.2358 0.594 0.098
BL-546 ... 4x6 0.975 1.092 ... ... ... ...
BL-566 ... 6x6 1.170 1.287 ... ... ... ...
BL-622 ... 2x2 0.528 0.684 ... ... ... ...
BL-623 ... 2x3 0.660 0.816 ... ... ... ...
BL-634 ... 3X4 0.924 1.080 ... ... ... ...
BL-644 0.750 4x4 1.056 1.212 0.3126 0.3134 0.713 0.130
BL-646 ... 4x6 1.320 1.476 ... ... ... ...
BL-666 ... 6x6 1.584 1.740 ... ... ... ...
BL-822 ... 2x2 0.652 0.840 ... ... ... ...
BL-823  ... 2x3 0.815 1.003 ... ... ... ...
BL-834 ... 3x4 1.141 1.329 ... ... ... ...
BL-844 1.000 4x4 1.304 1.492 0.376 0.376 0.950 0.161
BL-846 ... 4x6 1.630 1.818 ... ... ... ...
BL-866 ... 6x6 1.956 2.144 ... ... ... ...
Chain No. Pitch Lacing Wmax Wmax Dmax Smin Hmax Tmax
BL-1022 ... 2x2 0.780 0.999 ... ... ... ...
BL-1023 ... 2x3 0.975 1.194 ... ... ... ...
BL-1034 ... 3x4 1.365 1.584 ... ... ... ...
BL-1044 1.250 4x4 1.560 1.779 0.4374 0.4386 1.188 0.193
BL-1046 ... 4x6 1.950 2.169 ... ... ... ...
BL-1066 ... 6x6 2.340 2.559 ... ... ... ...
BL-1222 ... 2x2 0.916 1.166 ... ... ... ...
BL-1223  ... 2x3 1.145 1.395 ... ... ... ...
BL-1234 ... 3x4 1.603 1.853 ... ... ... ...
BL-1244 1.500 4x4 1.832 2.082 0.5004 0.5016 1.425 0.227
BL-1246 ... 4x6 2.290 2.2540 ... ... ... ...
BL-1266 ... 6x6 2.748 2.998 ... ... ... ...
BL-1422 ... 2x2 1.040 1.321 ... ... ... ...
BL-1423 ... 2x3 1.300 1.581 ... ... ... ...
BL-1434 ... 3X4 1.820 2.101 ... ... ... ...
BL-1444 1.750 4x4 2.080 2.361 0.5626 0.5634 1.663 0.260
BL-1446 ... 4x6 2.600 2.881 ... ... ... ...
BL-1466 ... 6x6 3.120 3.401 ... ... ... ...
BL-1622 ... 2x2 1.192 1.536 ... ... ... ...
BL-1623 ... 2x3 1.490 1.834 ... ... ... ...
BL-1634 ... 3x4 2.086 2.430 ... ... ... ...
BL-1644 2.000 4x4 2.384 2.728 0.6874 0.6886 1.9000 0.296
BL-1646 ... 4x6 2.980 3.324 ... ... ... ...
BL-1666 ... 6x6 3.576 3.920 ... ... ... ...
BL-2022 ... 2x2 1.568 2.037 ... ... ... ...
BL-2023 ... 2x3 1.960 2.429 ... ... ... ...
BL-2034 ... 3x4 2.744 3.213 ... ... ... ...
BL-2044 2.500 4x4 3.136 3.605 0.9374 0.9386 2.375 0.390
BL-2046 ... 4x6 3.920 4.389 ... ... ... ...
BL-2066 ... 6x6 4.704 5.173 ... ... ... ...

Supplements:

Reference:

  • ASME B29.8-2010 - Leaf Chains, Clevises, and Sheaves