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The B-LOC brand is synonymous with world class quality, engineering excellence and unrivaled customer support. Fenner Drives B-LOC Keyless Bushings provide a high capacity, zero-backlash shaft-to-hub connection by using the simple wedge principle. An axial force is applied by series of annular screws to engage circular steel rings and mating tapers. The resulting wedge action creates a radial force on the tapered rings, one of which contracts to squeeze the shaft while the other expands and presses into the component bore.
Straight Locking Assemblies
Unit of Measure
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Item #

Item Name

Screw Size

Torque [Max]

Tightening Torque

Outside Diameter

BCH501065-050 N/A BCH50 65 mm M10 x 50 N/A M10 x 50 N/A 4930 N·m N/A 81 N·m N/A 138 mm
BCH501070-040 N/A BCH50 70 mm M10 x 40 N/A M10 x 40 N/A 5973 N·m N/A 81 N·m N/A 156 mm
BCH501070-050 N/A BCH50 70 mm M10 x 50 N/A M10 x 50 N/A 5973 N·m N/A 81 N·m N/A 156 mm
BCH501075-040 N/A BCH50 75 mm M10 x 40 N/A M10 x 40 N/A 6400 N·m N/A 81 N·m N/A 156 mm
BCH501075-050 N/A BCH50 75 mm M10 x 50 N/A M10 x 50 N/A 6400 N·m N/A 81 N·m N/A 156 mm
BCH502008-020 N/A BCH50 1/2" M5 x 20 N/A M5 x 20 N/A 104 lb·ft N/A 7 lb·ft N/A 1.850 in
BCH502008-025 N/A BCH50 1/2" M5 x 25 N/A M5 x 25 N/A 104 lb·ft N/A 7 lb·ft N/A 1.850 in
BCH502010-020 N/A BCH50 5/8" M5 x 20 N/A M5 x 20 N/A 129 lb·ft N/A 7 lb·ft N/A 1.850 in
BCH502010-025 N/A BCH50 5/8" M5 x 25 N/A M5 x 25 N/A 129 lb·ft N/A 7 lb·ft N/A 1.850 in
BCH502012-020 N/A BCH50 3/4" M5 x 20 N/A M5 x 20 N/A 186 lb·ft N/A 7 lb·ft N/A 2.047 in
BCH502012-025 N/A BCH50 3/4" M5 x 25 N/A M5 x 25 N/A 186 lb·ft N/A 7 lb·ft N/A 2.047 in
BCH502014-025 N/A BCH50 7/8" M5 x 25 N/A M5 x 25 N/A 217 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502014-030 N/A BCH50 7/8" M5 x 30 N/A M5 x 30 N/A 217 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502015-025 N/A BCH50 15/16" M5 x 25 N/A M5 x 25 N/A 233 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502015-030 N/A BCH50 15/16" M5 x 30 N/A M5 x 30 N/A 233 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502100-025 N/A BCH50 1" M5 x 25 N/A M5 x 25 N/A 248 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502100-030 N/A BCH50 1" M5 x 30 N/A M5 x 30 N/A 248 lb·ft N/A 7 lb·ft N/A 2.2830 in
BCH502102-025 N/A BCH50 1.125" M5 x 25 N/A M5 x 25 N/A 385 lb·ft N/A 7 lb·ft N/A 2.559 in
BCH502102-030 N/A BCH50 1.125" M5 x 30 N/A M5 x 30 N/A 385 lb·ft N/A 7 lb·ft N/A 2.559 in
BCH502103-025 N/A BCH50 1.1875" M5 x 25 N/A M5 x 25 N/A 406 lb·ft N/A 7 lb·ft N/A 2.559 in
BCH502103-030 N/A BCH50 1.1875" M5 x 30 N/A M5 x 30 N/A 406 lb·ft N/A 7 lb·ft N/A 2.559 in
BCH502104-030 N/A BCH50 1.25" M6 x 30 N/A M6 x 30 N/A 564 lb·ft N/A 12 lb·ft N/A 2.953 in
BCH502104-035 N/A BCH50 1.25" M6 x 35 N/A M6 x 35 N/A 564 lb·ft N/A 12 lb·ft N/A 2.953 in
BCH502106-030 N/A BCH50 1.375" M6 x 30 N/A M6 x 30 N/A 621 lb·ft N/A 12 lb·ft N/A 2.953 in
BCH502106-035 N/A BCH50 1.375" M6 x 35 N/A M6 x 35 N/A 621 lb·ft N/A 12 lb·ft N/A 2.953 in
Unit of Measure
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