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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 |
|---|---|---|---|---|---|
| BCH202010-020 /Asset/BCH_20.jpg | N/A BCH20 5/8" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 60 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.496 in |
| BCH202012-016 /Asset/BCH_20.jpg | N/A BCH20 3/4" M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 72 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.732 in |
| BCH202012-020 /Asset/BCH_20.jpg | N/A BCH20 3/4" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 72 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.732 in |
| BCH202014-020 /Asset/BCH_20.jpg | N/A BCH20 7/8" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 84 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202014-025 /Asset/BCH_20.jpg | N/A BCH20 7/8" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 84 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202015-020 /Asset/BCH_20.jpg | N/A BCH20 15/16" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 90 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202015-025 /Asset/BCH_20.jpg | N/A BCH20 15/16" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 90 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202100-020 /Asset/BCH_20.jpg | N/A BCH20 1" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 97 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202100-025 /Asset/BCH_20.jpg | N/A BCH20 1" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 97 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.969 in |
| BCH202102-020 /Asset/BCH_20.jpg | N/A BCH20 1.125" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 136 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.165 in |
| BCH202102-025 /Asset/BCH_20.jpg | N/A BCH20 1.125" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 136 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.165 in |
| BCH202103-020 /Asset/BCH_20.jpg | N/A BCH20 1.1875" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 136 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.165 in |
| BCH202103-025 /Asset/BCH_20.jpg | N/A BCH20 1.1875" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 136 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.165 in |
| BCH202104-020 /Asset/BCH_20.jpg | N/A BCH20 1.25" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 180 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.362 in |
| BCH202104-025 /Asset/BCH_20.jpg | N/A BCH20 1.25" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 180 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.362 in |
| BCH202106-020 /Asset/BCH_20.jpg | N/A BCH20 1.375" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 180 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.362 in |
| BCH202106-025 /Asset/BCH_20.jpg | N/A BCH20 1.375" M4 x 25 | Screw Size N/A M4 x 25 | Torque [Max] N/A 180 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 2.362 in |
| BCH202107-025 /Asset/BCH_20.jpg | N/A BCH20 1.4375" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 237 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.756 in |
| BCH202107-030 /Asset/BCH_20.jpg | N/A BCH20 1.4375" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 237 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.756 in |
| BCH202108-025 /Asset/BCH_20.jpg | N/A BCH20 1.5" M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 237 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.756 in |
| BCH202108-030 /Asset/BCH_20.jpg | N/A BCH20 1.5" M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 237 lb·ft | Tightening Torque N/A 7 lb·ft | Outside Diameter N/A 2.756 in |
| BCH202110-025 /Asset/BCH_20.jpg | N/A BCH20 1.625" 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 2.992 in |
| BCH202110-030 /Asset/BCH_20.jpg | N/A BCH20 1.625" 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 2.992 in |
| BCH202111-025 /Asset/BCH_20.jpg | N/A BCH20 1.6875" 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 2.992 in |
| BCH202111-030 /Asset/BCH_20.jpg | N/A BCH20 1.6875" 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 2.992 in |
