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Straight Locking Assemblies
Belts, Sheaves and Pulleys
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.
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Series
Screw Size
Tightening Torque (lb·ft)
Tightening Torque (N·m)
Outside Diameter (in)
Outside Diameter (mm)
Bore Size (in)
Bore Size (mm)
Length Through Bore (in)
Length Through Bore (mm)
Item # |
Item Name |
Screw Size |
Torque [Max] |
Tightening Torque |
Outside Diameter |
|---|---|---|---|---|---|
| BCH501065-050 | N/A BCH50 65 mm M10 x 50 | Screw Size N/A M10 x 50 | Torque [Max] N/A 4930 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 138 mm |
| BCH501070-040 | N/A BCH50 70 mm M10 x 40 | Screw Size N/A M10 x 40 | Torque [Max] N/A 5973 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 156 mm |
| BCH501070-050 | N/A BCH50 70 mm M10 x 50 | Screw Size N/A M10 x 50 | Torque [Max] N/A 5973 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 156 mm |
| BCH501075-040 | N/A BCH50 75 mm M10 x 40 | Screw Size N/A M10 x 40 | Torque [Max] N/A 6400 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 156 mm |
| BCH501075-050 | N/A BCH50 75 mm M10 x 50 | Screw Size N/A M10 x 50 | Torque [Max] N/A 6400 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 156 mm |
| BCH502008-020 | N/A BCH50 1/2" M5 x 20 | Screw Size N/A M5 x 20 | Torque [Max] N/A 104 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 1.850 in |
| BCH502008-025 | N/A BCH50 1/2" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 104 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 1.850 in |
| BCH502010-020 | N/A BCH50 5/8" M5 x 20 | Screw Size N/A M5 x 20 | Torque [Max] N/A 129 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 1.850 in |
| BCH502010-025 | N/A BCH50 5/8" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 129 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 1.850 in |
| BCH502012-020 | N/A BCH50 3/4" M5 x 20 | Screw Size N/A M5 x 20 | Torque [Max] N/A 186 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.047 in |
| BCH502012-025 | N/A BCH50 3/4" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 186 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.047 in |
| BCH502014-025 | N/A BCH50 7/8" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 217 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502014-030 | N/A BCH50 7/8" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 217 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502015-025 | N/A BCH50 15/16" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 233 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502015-030 | N/A BCH50 15/16" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 233 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502100-025 | N/A BCH50 1" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 248 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502100-030 | N/A BCH50 1" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 248 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.2830 in |
| BCH502102-025 | N/A BCH50 1.125" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 385 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.559 in |
| BCH502102-030 | N/A BCH50 1.125" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 385 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.559 in |
| BCH502103-025 | N/A BCH50 1.1875" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 406 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.559 in |
| BCH502103-030 | N/A BCH50 1.1875" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 406 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.559 in |
| BCH502104-030 | N/A BCH50 1.25" M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 564 lb·ft | Tightening Torque N/A 12 lb·ft | Outside Diameter N/A 2.953 in |
| BCH502104-035 | N/A BCH50 1.25" M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 564 lb·ft | Tightening Torque N/A 12 lb·ft | Outside Diameter N/A 2.953 in |
| BCH502106-030 | N/A BCH50 1.375" M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 621 lb·ft | Tightening Torque N/A 12 lb·ft | Outside Diameter N/A 2.953 in |
| BCH502106-035 | N/A BCH50 1.375" M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 621 lb·ft | Tightening Torque N/A 12 lb·ft | Outside Diameter N/A 2.953 in |
