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British System Worm Gearbox

British System Worm Gearbox

Technical Parameters of British System Worm Gearbox:
NEMA Frame LA LB LC LE LZ Input
Bore Keyway
56C 5.875 4.50 6.50 0.16 0.43 0.625 3/16 × 3/32
143TC/145TC 5.875 4.50 6.50 0.16 0.43 0.875 3/16 × 3/32
182TC/184TC 7.250 8.50 9.00 0.23 0.55 1.125 1/4 × 1/8
213TC/215TC 7.250 8.50 9.00 0.23 0.55 1.375 5/16 × 5/32
254TC/256TC 7.250 8.50 10.00 0.23 0.55 1.625 3/8 × 3/16
Size Radio A A1 AB AC B BB BD
40 5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1		 2.58 3.92 3.94 1.85 3.31 2.68
50 2.85 4.19 4.48 2.08 3.82 2.72
60 3.15 4.43 5.00 2.20 4.33 2.99
63 3.37 4.67 5.51 2.36 4.45 3.46
70 3.76 4.63 6.10 2.52 5.12 3.31
80 4.11 5.84 6.69 2.85 5.51 3.94
100 4.78 6.51 8.03 3.33 6.42 4.49
120 6.10 8.26 7.48 10.24 3.94 7.28 5.04
135 6.89 9.06 8.32 11.65 4.33 8.27 5.91
155 7.64 10.24 9.35 12.99 5.20 9.92 6.69
175 8.78 11.42 11.02 14.57 5.71 10.31 7.32
Size BE BF CC H HL LL Z L
40 2.13 3.15 1.575 5.00 1.34 2.09 5/16-18 0.63
50 1.97 3.54 1.969 5.91 1.38 2.56 5/16-18 0.63
60 2.13 3.94 2.362 6.97 1.65 2.95 3/8-16 0.75
63 2.69 4.87 2.480 7.32 1.89 2.95 3/8-16 0.75
70 2.56 4.92 2.756 8.46 2.16 3.54 3/8-16 0.75
80 2.76 5.51 3.150 9.84 2.56 4.13 3/8-16 0.75
100 3.54 7.09 3.937 12.20 3.15 5.12 1/2-13 0.94
120 3.94 8.66 4.724 14.57 3.74 6.10 1/2-13 0.94
135 4.33 10.24 5.315 16.73 4.13 7.28 5/8-11 1.13
155 4.72 11.02 6.102 18.15 4.05 7.99 5/8-11 1.13
175 5.51 12.60 6.890 20.51 4.84 8.78 3/4-10 1.38
Size Output Shaft With Horizontal Base NEMA Frame
S LS W × Y E F M N G X
40 0.625 1.38 3/16 × 3/32 3.54 3.94 4.33 4.92 0.51 0.39 56C
50 0.750 1.57 3/16 × 3/32 3.74 4.33 4.72 5.51 0.59 0.43 56C, 140TC
60 1.000 1.97 1/4 × 1/8 4.13 4.72 5.12 5.91 0.71 0.43 56C, 140TC
63 1.000 1.97 1/4 ×1/8 4.33 5.91 5.51 7.09 0.71 0.43 56C, 140TC
70 1.125 2.36 1/4× 1/8 4.53 5.91 5.91 7.48 0.71 0.59 56C, 140TC
80 1.375 2.56 5/16 × 5/32 5.31 7.09 6.69 8.66 0.71 0.59 56C, 140TC, 180TC
100 1.500 2.95 3/8 ×3/16 6.10 8.66 7.48 10.63 0.79 0.59 56C, 140TC, 180TC
120 1.750 3.35 3/8 × 3/16 7.09 10.24 9.06 12.60 0.98 0.71 180TC, 210TC
135 2.250 3.74 1/2 × 1/4 7.87 11.42 9.84 13.78 1.18 0.71 180TC, 210TC
155 2.500 4.33 5/8 × 5/16 8.66 12.60 11.02 14.96 1.26 0.79 180TC, 210TC
175 2.750 4.33 5/8 × 5/16 9.84 13.78 12.20 16.14 1.46 0.79 180TC, 210TC, 250TC
British System Worm Gearbox