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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 |
|---|---|---|---|---|---|
| BCH501028-025 /Asset/BCH_50.jpg | N/A BCH50 28 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 511 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 65.000 mm |
| BCH501028-030 /Asset/BCH_50.jpg | N/A BCH50 28 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 511 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 65.000 mm |
| BCH501030-025 /Asset/BCH_50.jpg | N/A BCH50 30 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 548 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 65.000 mm |
| BCH501030-030 /Asset/BCH_50.jpg | N/A BCH50 30 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 548 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 65.000 mm |
| BCH501032-030 /Asset/BCH_50.jpg | N/A BCH50 32 mm M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 771 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 75.000 mm |
| BCH501032-035 /Asset/BCH_50.jpg | N/A BCH50 32 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 771 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 75.000 mm |
| BCH501035-030 /Asset/BCH_50.jpg | N/A BCH50 35 mm M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 843 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 75.000 mm |
| BCH501035-035 /Asset/BCH_50.jpg | N/A BCH50 35 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 843 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 75.000 mm |
| BCH501038-030 /Asset/BCH_50.jpg | N/A BCH50 38 mm M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 1145 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 84 mm |
| BCH501038-035 /Asset/BCH_50.jpg | N/A BCH50 38 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 1145 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 84 mm |
| BCH501040-030 /Asset/BCH_50.jpg | N/A BCH50 40 mm M6 x 30 | Screw Size N/A M6 x 30 | Torque [Max] N/A 1205 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 84 mm |
| BCH501040-035 /Asset/BCH_50.jpg | N/A BCH50 40 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 1205 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 84 mm |
| BCH501042-035 /Asset/BCH_50.jpg | N/A BCH50 42 mm M8 x 35 | Screw Size N/A M8 x 35 | Torque [Max] N/A 1740 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 96 mm |
| BCH501042-045 /Asset/BCH_50.jpg | N/A BCH50 42 mm M8 x 45 | Screw Size N/A M8 x 45 | Torque [Max] N/A 1740 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 96 mm |
| BCH501045-035 /Asset/BCH_50.jpg | N/A BCH50 45 mm M8 x 35 | Screw Size N/A M8 x 35 | Torque [Max] N/A 1864 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 96 mm |
| BCH501045-045 /Asset/BCH_50.jpg | N/A BCH50 45 mm M8 x 45 | Screw Size N/A M8 x 45 | Torque [Max] N/A 1864 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 96 mm |
| BCH501048-035 /Asset/BCH_50.jpg | N/A BCH50 48 mm M8 x 35 | Screw Size N/A M8 x 35 | Torque [Max] N/A 2273 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501048-045 /Asset/BCH_50.jpg | N/A BCH50 48 mm M8 x 45 | Screw Size N/A M8 x 45 | Torque [Max] N/A 2273 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501050-035 /Asset/BCH_50.jpg | N/A BCH50 50 mm M8 x 35 | Screw Size N/A M8 x 35 | Torque [Max] N/A 2367 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501050-045 /Asset/BCH_50.jpg | N/A BCH50 50 mm M8 x 45 | Screw Size N/A M8 x 45 | Torque [Max] N/A 2367 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501055-035 /Asset/BCH_50.jpg | N/A BCH50 55 mm M8 x 35 | Screw Size N/A M8 x 35 | Torque [Max] N/A 2604 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501055-045 /Asset/BCH_50.jpg | N/A BCH50 55 mm M8 x 45 | Screw Size N/A M8 x 45 | Torque [Max] N/A 2604 N·m | Tightening Torque N/A 41 N·m | Outside Diameter N/A 115 mm |
| BCH501060-040 /Asset/BCH_50.jpg | N/A BCH50 60 mm M10 x 40 | Screw Size N/A M10 x 40 | Torque [Max] N/A 4551 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 138 mm |
| BCH501060-050 /Asset/BCH_50.jpg | N/A BCH50 60 mm M10 x 50 | Screw Size N/A M10 x 50 | Torque [Max] N/A 4551 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 138 mm |
| BCH501065-040 /Asset/BCH_50.jpg | N/A BCH50 65 mm M10 x 40 | Screw Size N/A M10 x 40 | Torque [Max] N/A 4930 N·m | Tightening Torque N/A 81 N·m | Outside Diameter N/A 138 mm |
