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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 |
|---|---|---|---|---|---|
| BCH201038-025 /Asset/BCH_20.jpg | N/A BCH20 38 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 321 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 70 mm |
| BCH201038-030 /Asset/BCH_20.jpg | N/A BCH20 38 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 321 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 70 mm |
| BCH201040-025 /Asset/BCH_20.jpg | N/A BCH20 40 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 321 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 70 mm |
| BCH201040-030 /Asset/BCH_20.jpg | N/A BCH20 40 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 321 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 70 mm |
| BCH201042-025 /Asset/BCH_20.jpg | N/A BCH20 42 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 522 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 76.000 mm |
| BCH201042-030 /Asset/BCH_20.jpg | N/A BCH20 42 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 522 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 76.000 mm |
| BCH201045-025 /Asset/BCH_20.jpg | N/A BCH20 45 mm M5 x 25 | Screw Size N/A M5 x 25 | Torque [Max] N/A 522 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 76.000 mm |
| BCH201045-030 /Asset/BCH_20.jpg | N/A BCH20 45 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 522 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 76.000 mm |
| BCH201048-030 /Asset/BCH_20.jpg | N/A BCH20 48 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201048-040 /Asset/BCH_20.jpg | N/A BCH20 48 mm M5 x 40 | Screw Size N/A M5 x 40 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201050-030 /Asset/BCH_20.jpg | N/A BCH20 50 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201050-040 /Asset/BCH_20.jpg | N/A BCH20 50 mm M5 x 40 | Screw Size N/A M5 x 40 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201055-030 /Asset/BCH_20.jpg | N/A BCH20 55 mm M5 x 30 | Screw Size N/A M5 x 30 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201055-040 /Asset/BCH_20.jpg | N/A BCH20 55 mm M5 x 40 | Screw Size N/A M5 x 40 | Torque [Max] N/A 926 N·m | Tightening Torque N/A 10 N·m | Outside Diameter N/A 90.000 mm |
| BCH201060-035 /Asset/BCH_20.jpg | N/A BCH20 60 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 1445 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 105 mm |
| BCH201060-045 /Asset/BCH_20.jpg | N/A BCH20 60 mm M6 x 45 | Screw Size N/A M6 x 45 | Torque [Max] N/A 1445 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 105 mm |
| BCH201065-035 /Asset/BCH_20.jpg | N/A BCH20 65 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 1445 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 105 mm |
| BCH201065-045 /Asset/BCH_20.jpg | N/A BCH20 65 mm M6 x 45 | Screw Size N/A M6 x 45 | Torque [Max] N/A 1445 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 105 mm |
| BCH201070-035 /Asset/BCH_20.jpg | N/A BCH20 70 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 2192 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 120.000 mm |
| BCH201070-045 /Asset/BCH_20.jpg | N/A BCH20 70 mm M6 x 45 | Screw Size N/A M6 x 45 | Torque [Max] N/A 2192 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 120.000 mm |
| BCH201075-035 /Asset/BCH_20.jpg | N/A BCH20 75 mm M6 x 35 | Screw Size N/A M6 x 35 | Torque [Max] N/A 2192 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 120.000 mm |
| BCH201075-045 /Asset/BCH_20.jpg | N/A BCH20 75 mm M6 x 45 | Screw Size N/A M6 x 45 | Torque [Max] N/A 2192 N·m | Tightening Torque N/A 16 N·m | Outside Diameter N/A 120.000 mm |
| BCH202008-016 /Asset/BCH_20.jpg | N/A BCH20 1/2" M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 48 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.496 in |
| BCH202008-020 /Asset/BCH_20.jpg | N/A BCH20 1/2" M4 x 20 | Screw Size N/A M4 x 20 | Torque [Max] N/A 48 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.496 in |
| BCH202010-016 /Asset/BCH_20.jpg | N/A BCH20 5/8" M4 x 16 | Screw Size N/A M4 x 16 | Torque [Max] N/A 60 lb·ft | Tightening Torque N/A 3.5 lb·ft | Outside Diameter N/A 1.496 in |
