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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 |
|---|---|---|---|---|---|
| B152515 | N/A B-LOC B115 5.9375" | Screw Size N/A M12 x 70 | Torque [Max] N/A 31861 N·m | Tightening Torque N/A 105 N·m | Outside Diameter N/A 7.874 in |
| B152615 | N/A B-LOC B115 6.9375" | Screw Size N/A M14 x 80 | Torque [Max] N/A 50665 N·m | Tightening Torque N/A 166 N·m | Outside Diameter N/A 9.252 in |
| B152715 | N/A B-LOC B115 7.9375" | Screw Size N/A M14 x 80 | Torque [Max] N/A 69561 N·m | Tightening Torque N/A 166 N·m | Outside Diameter N/A 10.236 in |
| B301025 | N/A B-LOC B103 25 mm x 50 mm | Screw Size N/A M6 x 20 | Torque [Max] N/A 546 N·m | Tightening Torque N/A 14 N·m | Outside Diameter N/A 50 mm |
| B301030 | N/A B-LOC B103 30 mm x 55 mm | Screw Size N/A M6 x 20 | Torque [Max] N/A 655 N·m | Tightening Torque N/A 14 N·m | Outside Diameter N/A 55.000 mm |
| B301035 | N/A B-LOC B103 35 mm x 60 mm | Screw Size N/A M6 x 20 | Torque [Max] N/A 1018 N·m | Tightening Torque N/A 14 N·m | Outside Diameter N/A 60 mm |
| B301040 | N/A B-LOC B103 40 mm x 65 mm | Screw Size N/A M6 x 20 | Torque [Max] N/A 1164 N·m | Tightening Torque N/A 14 N·m | Outside Diameter N/A 65.000 mm |
| B301045 | N/A B-LOC B103 45 mm x 75 mm | Screw Size N/A M8 x 25 | Torque [Max] N/A 2133 N·m | Tightening Torque N/A 34 N·m | Outside Diameter N/A 75.000 mm |
| B301050 | N/A B-LOC B103 50 mm x 80 mm | Screw Size N/A M8 x 25 | Torque [Max] N/A 2371 N·m | Tightening Torque N/A 34 N·m | Outside Diameter N/A 80 mm |
| B301060 | N/A B-LOC B103 60 mm x 90 mm | Screw Size N/A M8 x 25 | Torque [Max] N/A 3251 N·m | Tightening Torque N/A 34 N·m | Outside Diameter N/A 90.000 mm |
| B301070 | N/A B-LOC B103 70 mm x 110 mm | Screw Size N/A M10 x 30 | Torque [Max] N/A 6151 N·m | Tightening Torque N/A 68 N·m | Outside Diameter N/A 110.000 mm |
| B301085 | N/A B-LOC B103 85 mm x 125 mm | Screw Size N/A M10 x 30 | Torque [Max] N/A 8403 N·m | Tightening Torque N/A 68 N·m | Outside Diameter N/A 125 mm |
| B301090 | N/A B-LOC B103 90 mm x 130 mm | Screw Size N/A M10 x 30 | Torque [Max] N/A 8897 N·m | Tightening Torque N/A 68 N·m | Outside Diameter N/A 130 mm |
| B301100 | N/A B-LOC B103 100 mm x 145 mm | Screw Size N/A M12 x 35 | Torque [Max] N/A 13478 N·m | Tightening Torque N/A 122 N·m | Outside Diameter N/A 145.000 mm |
| B301120 | N/A B-LOC B103 120 mm x 165 mm | Screw Size N/A M12 x 35 | Torque [Max] N/A 18195 N·m | Tightening Torque N/A 122 N·m | Outside Diameter N/A 165 mm |
| B302012 | N/A B-LOC B103 0.75" | Screw Size N/A M6 x 20 | Torque [Max] N/A 247 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 1.850 in |
| B302100 | N/A B-LOC B103 1" | Screw Size N/A M6 x 20 | Torque [Max] N/A 396 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 1.969 in |
| B302102 | N/A B-LOC B103 1.125" | Screw Size N/A M6 x 20 | Torque [Max] N/A 445 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.165 in |
| B302103 | N/A B-LOC B103 1.1875" | Screw Size N/A M6 x 20 | Torque [Max] N/A 470 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.165 in |
| B302104 | N/A B-LOC B103 1.25" | Screw Size N/A M6 x 20 | Torque [Max] N/A 660 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.362 in |
| B302106 | N/A B-LOC B103 1.375" | Screw Size N/A M6 x 20 | Torque [Max] N/A 726 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.362 in |
| B302107 | N/A B-LOC B103 1.4375" | Screw Size N/A M6 x 20 | Torque [Max] N/A 759 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.559 in |
| B302108 | N/A B-LOC B103 1.5" | Screw Size N/A M6 x 20 | Torque [Max] N/A 792 lb·ft | Tightening Torque N/A 10 lb·ft | Outside Diameter N/A 2.559 in |
| B302110 | N/A B-LOC B103 1.625" | Screw Size N/A M8 x 25 | Torque [Max] N/A 1439 lb·ft | Tightening Torque N/A 25 lb·ft | Outside Diameter N/A 2.953 in |
| B302112 | N/A B-LOC B103 1.75" | Screw Size N/A M8 x 25 | Torque [Max] N/A 1550 lb·ft | Tightening Torque N/A 25 lb·ft | Outside Diameter N/A 2.953 in |
