B-LOC Keyless Bushings

B-LOC Logo

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.

Helpful Design Tools:

CAD Drawings >>
B-LOC Interchange Guide >>
Hub OD Calculator >>

Can’t find what you're looking for?  Please download our Keyless Locking Devices Catalog to view our full product offering.

To compare items, select up to 4 and click here

Image of B-LOC B103 60mm

B-LOC B103 60mm

More Information

  • Series: B103
  • Torque Transmission: 3251 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 90.05
  • Compliancy: RoHS
  • Component Bore Diameter: 90mm
  • Hub Pressure: 160
  • Installation Torque: 34 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 60mm
  • Shaft Tolerance: 59.95
  • Taper: Single
  • Thrust: 108368

Image of B-LOC B112 3-7/8"

  • Series: B112
  • Torque Transmission: 19811
  • Axial Movement: No
  • Bore Tolerance: 5.712
  • Compliancy: RoHS
  • Component Bore Diameter: 5.709"
  • Hub Pressure: 20688
  • Installation Torque: 105 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M12 x 80
  • Self-Centering: Yes
  • Shaft Diameter: 3 7/8"
  • Shaft Tolerance: 3.872
  • Taper: Double
  • Thrust: 122699

Image of B-LOC B112 95mm

B-LOC B112 95mm

More Information

  • Series: B112
  • Torque Transmission: 18824
  • Axial Movement: No
  • Bore Tolerance: 135.08
  • Compliancy: RoHS
  • Component Bore Diameter: 135mm
  • Hub Pressure: 139
  • Installation Torque: 81 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 60
  • Self-Centering: Yes
  • Shaft Diameter: 95mm
  • Shaft Tolerance: 94.92
  • Taper: Double
  • Thrust: 396302

Image of B-LOC B106 2-1/8"

  • Series: B106
  • Torque Transmission: 1629
  • Axial Movement: No
  • Bore Tolerance: 3.348
  • Compliancy: RoHS
  • Component Bore Diameter: 3.346"
  • Hub Pressure: 18516
  • Installation Torque: 30 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 2 1/8"
  • Shaft Tolerance: 2.123
  • Taper: Single
  • Thrust: 18393

Image of B-LOC B400 95mm

B-LOC B400 95mm

More Information

  • Series: B400
  • Torque Transmission: 10259
  • Axial Movement: No
  • Bore Tolerance: 135.1
  • Component Bore Diameter: 135mm
  • Hub Pressure: 177
  • Installation Torque: 69 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M10 x 25
  • Self-Centering: No
  • Shaft Diameter: 95mm
  • Shaft Tolerance: 94.9
  • Taper: Double
  • Thrust: 215984

Image of B-LOC B112 2-7/16"

  • Series: B112
  • Torque Transmission: 4669
  • Axial Movement: No
  • Bore Tolerance: 3.742
  • Compliancy: RoHS
  • Component Bore Diameter: 3.74"
  • Hub Pressure: 18822
  • Installation Torque: 30 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 55
  • Self-Centering: Yes
  • Shaft Diameter: 2 7/16"
  • Shaft Tolerance: 2.4355
  • Taper: Double
  • Thrust: 45974

Image of B-LOC B112 90mm

B-LOC B112 90mm

More Information

  • Series: B112
  • Torque Transmission: 17834
  • Axial Movement: No
  • Bore Tolerance: 130.08
  • Compliancy: RoHS
  • Component Bore Diameter: 130mm
  • Hub Pressure: 144
  • Installation Torque: 81 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 60
  • Self-Centering: Yes
  • Shaft Diameter: 90mm
  • Shaft Tolerance: 89.92
  • Taper: Double
  • Thrust: 396302

Image of B-LOC B112 3-1/4"

  • Series: B112
  • Torque Transmission: 11107
  • Axial Movement: No
  • Bore Tolerance: 4.727
  • Compliancy: RoHS
  • Component Bore Diameter: 4.724"
  • Hub Pressure: 20887
  • Installation Torque: 60 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 60
  • Self-Centering: Yes
  • Shaft Diameter: 3 1/4"
  • Shaft Tolerance: 3.247
  • Taper: Double
  • Thrust: 82017

Image of B-LOC B400 3-1/4"

  • Series: B400
  • Torque Transmission: 5857
  • Axial Movement: No
  • Bore Tolerance: 4.925
  • Component Bore Diameter: 4.921"
  • Hub Pressure: 24672
  • Installation Torque: 51 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Releasing
  • Screw Size: M10 x 25
  • Self-Centering: No
  • Shaft Diameter: 3 1/4"
  • Shaft Tolerance: 3.246
  • Taper: Double
  • Thrust: 43250

Image of B-LOC B106 4"

B-LOC B106 4"

More Information

  • Series: B106
  • Torque Transmission: 7438
  • Axial Movement: No
  • Bore Tolerance: 5.712
  • Compliancy: RoHS
  • Component Bore Diameter: 5.709"
  • Hub Pressure: 20258
  • Installation Torque: 105 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M12 x 35
  • Self-Centering: Yes
  • Shaft Diameter: 4"
  • Shaft Tolerance: 3.997
  • Taper: Single
  • Thrust: 44627

Image of B-LOC B400 2-3/16"

  • Series: B400
  • Torque Transmission: 2169
  • Axial Movement: No
  • Bore Tolerance: 3.546
  • Component Bore Diameter: 3.543"
  • Hub Pressure: 22622
  • Installation Torque: 26 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Releasing
  • Screw Size: M8 x 22
  • Self-Centering: No
  • Shaft Diameter: 2 3/16"
  • Shaft Tolerance: 2.1845
  • Taper: Double
  • Thrust: 23792

Image of B-LOC B112 48mm

B-LOC B112 48mm

More Information

  • Series: B112
  • Torque Transmission: 3958
  • Axial Movement: No
  • Bore Tolerance: 80.05
  • Compliancy: RoHS
  • Component Bore Diameter: 80mm
  • Hub Pressure: 124
  • Installation Torque: 41 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 55
  • Self-Centering: Yes
  • Shaft Diameter: 48mm
  • Shaft Tolerance: 47.95
  • Taper: Double
  • Thrust: 164918

Image of B-LOC B112 70mm

B-LOC B112 70mm

More Information

  • Series: B112
  • Torque Transmission: 11559
  • Axial Movement: No
  • Bore Tolerance: 110.05
  • Compliancy: RoHS
  • Component Bore Diameter: 110mm
  • Hub Pressure: 142
  • Installation Torque: 81 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 60
  • Self-Centering: Yes
  • Shaft Diameter: 70mm
  • Shaft Tolerance: 69.95
  • Taper: Double
  • Thrust: 330251

Image of B-LOC B106 2-7/16"

  • Series: B106
  • Torque Transmission: 2102
  • Axial Movement: No
  • Bore Tolerance: 3.742
  • Compliancy: RoHS
  • Component Bore Diameter: 3.74"
  • Hub Pressure: 18638
  • Installation Torque: 30 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 2 7/16"
  • Shaft Tolerance: 2.4355
  • Taper: Single
  • Thrust: 20693

Image of B-LOC B400 2-11/16"

  • Series: B400
  • Torque Transmission: 4238
  • Axial Movement: No
  • Bore Tolerance: 4.334
  • Component Bore Diameter: 4.331"
  • Hub Pressure: 24532
  • Installation Torque: 51 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Releasing
  • Screw Size: M10 x 25
  • Self-Centering: No
  • Shaft Diameter: 2 11/16"
  • Shaft Tolerance: 2.6845
  • Taper: Double
  • Thrust: 37844

Image of B-LOC B103 2-3/16"

  • Series: B103
  • Torque Transmission: 2214 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.348
  • Compliancy: RoHS
  • Component Bore Diameter: 3.346"
  • Hub Pressure: 24448
  • Installation Torque: 25 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 2 3/16"
  • Shaft Tolerance: 2.1855
  • Taper: Single
  • Thrust: 24286
Back To Top