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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 |
|---|---|---|---|---|---|
| BCH201012-020 /Asset/BCH_20.jpg | N/A BCH20 12 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 65 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 38 mm |
| BCH201014-016 /Asset/BCH_20.jpg | N/A BCH20 14 mm M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 76 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 38 mm |
| BCH201014-020 /Asset/BCH_20.jpg | N/A BCH20 14 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 76 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 38 mm |
| BCH201015-016 /Asset/BCH_20.jpg | N/A BCH20 15 mm M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 81 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 38 mm |
| BCH201015-020 /Asset/BCH_20.jpg | N/A BCH20 15 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 81 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 38 mm |
| BCH201018-016 /Asset/BCH_20.jpg | N/A BCH20 18 mm M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 97 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201018-020 /Asset/BCH_20.jpg | N/A BCH20 18 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 97 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201019-016 /Asset/BCH_20.jpg | N/A BCH20 19 mm M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 103 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201019-020 /Asset/BCH_20.jpg | N/A BCH20 19 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 103 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201020-016 /Asset/BCH_20.jpg | N/A BCH20 20 mm M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 108 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201020-020 /Asset/BCH_20.jpg | N/A BCH20 20 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 108 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 44.000 mm |
| BCH201022-020 /Asset/BCH_20.jpg | N/A BCH20 22 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 122 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201022-025 /Asset/BCH_20.jpg | N/A BCH20 22 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 122 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201024-020 /Asset/BCH_20.jpg | N/A BCH20 24 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 134 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201024-025 /Asset/BCH_20.jpg | N/A BCH20 24 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 134 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201025-020 /Asset/BCH_20.jpg | N/A BCH20 25 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 140 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201025-025 /Asset/BCH_20.jpg | N/A BCH20 25 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 140 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 50 mm |
| BCH201028-020 /Asset/BCH_20.jpg | N/A BCH20 28 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 195 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 55.000 mm |
| BCH201028-025 /Asset/BCH_20.jpg | N/A BCH20 28 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 195 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 55.000 mm |
| BCH201030-020 /Asset/BCH_20.jpg | N/A BCH20 30 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 195 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 55.000 mm |
| BCH201030-025 /Asset/BCH_20.jpg | N/A BCH20 30 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 195 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 55.000 mm |
| BCH201032-020 /Asset/BCH_20.jpg | N/A BCH20 32 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 257 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 60 mm |
| BCH201032-025 /Asset/BCH_20.jpg | N/A BCH20 32 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 257 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 60 mm |
| BCH201035-020 /Asset/BCH_20.jpg | N/A BCH20 35 mm M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 257 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 60 mm |
| BCH201035-025 /Asset/BCH_20.jpg | N/A BCH20 35 mm M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 257 N·m | Tightening Torque N/A 5 N·m | Outside Diameter N/A 60 mm |
