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 >>
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Image of B-LOC B400 170mm

  • Series: B400
  • Torque Transmission: 44752
  • Axial Movement: No
  • Bore Tolerance: 225.1
  • Component Bore Diameter: 225mm
  • Hub Pressure: 163
  • Installation Torque: 187 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M14 x 40
  • Self-Centering: No
  • Shaft Diameter: 170mm
  • Shaft Tolerance: 169.9
  • Taper: Double
  • Thrust: 526487

Image of B-LOC B400 100mm

  • Series: B400
  • Torque Transmission: 12800
  • Axial Movement: No
  • Bore Tolerance: 145.1
  • Component Bore Diameter: 145mm
  • Hub Pressure: 180
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 30
  • Self-Centering: No
  • Shaft Diameter: 100mm
  • Shaft Tolerance: 99.9
  • Taper: Double
  • Thrust: 255998

Image of B-LOC B400 150mm

  • Series: B400
  • Torque Transmission: 32917
  • Axial Movement: No
  • Bore Tolerance: 200.1
  • Component Bore Diameter: 200mm
  • Hub Pressure: 171
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 35
  • Self-Centering: No
  • Shaft Diameter: 150mm
  • Shaft Tolerance: 149.9
  • Taper: Double
  • Thrust: 438854

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 B400 200mm

  • Series: B400
  • Torque Transmission: 71794
  • Axial Movement: No
  • Bore Tolerance: 260.1
  • Component Bore Diameter: 260mm
  • Hub Pressure: 159
  • Installation Torque: 187 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M14 x 45
  • Self-Centering: No
  • Shaft Diameter: 200mm
  • Shaft Tolerance: 199.87
  • Taper: Double
  • Thrust: 717937

Image of B-LOC B400 120mm

  • Series: B400
  • Torque Transmission: 17553
  • Axial Movement: No
  • Bore Tolerance: 165.1
  • Component Bore Diameter: 165mm
  • Hub Pressure: 181
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 30
  • Self-Centering: No
  • Shaft Diameter: 120mm
  • Shaft Tolerance: 119.9
  • Taper: Double
  • Thrust: 292569

Image of B-LOC B400 85mm

B-LOC B400 85mm

More Information

  • Series: B400
  • Torque Transmission: 8158
  • Axial Movement: No
  • Bore Tolerance: 125.1
  • Component Bore Diameter: 125mm
  • Hub Pressure: 170
  • 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: 85mm
  • Shaft Tolerance: 84.9
  • Taper: Double
  • Thrust: 191986

Image of B-LOC B400 75mm

B-LOC B400 75mm

More Information

  • Series: B400
  • Torque Transmission: 6300
  • Axial Movement: No
  • Bore Tolerance: 115.08
  • Component Bore Diameter: 115mm
  • Hub Pressure: 161
  • 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: 75mm
  • Shaft Tolerance: 74.92
  • Taper: Double
  • Thrust: 167988

Image of B-LOC B400 110mm

  • Series: B400
  • Torque Transmission: 14081
  • Axial Movement: No
  • Bore Tolerance: 155.1
  • Component Bore Diameter: 155mm
  • Hub Pressure: 169
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 30
  • Self-Centering: No
  • Shaft Diameter: 110mm
  • Shaft Tolerance: 109.9
  • Taper: Double
  • Thrust: 255998

Image of B-LOC B400 70mm

B-LOC B400 70mm

More Information

  • Series: B400
  • Torque Transmission: 5880
  • Axial Movement: No
  • Bore Tolerance: 110.08
  • Component Bore Diameter: 110mm
  • Hub Pressure: 169
  • 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: 70mm
  • Shaft Tolerance: 69.92
  • Taper: Double
  • Thrust: 167988

Image of B-LOC B400 60mm

B-LOC B400 60mm

More Information

  • Series: B400
  • Torque Transmission: 3152
  • Axial Movement: No
  • Bore Tolerance: 90.08
  • Component Bore Diameter: 90mm
  • Hub Pressure: 155
  • Installation Torque: 35 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M8 x 22
  • Self-Centering: No
  • Shaft Diameter: 60mm
  • Shaft Tolerance: 59.92
  • Taper: Double
  • Thrust: 105083

Image of B-LOC B400 80mm

B-LOC B400 80mm

More Information

  • Series: B400
  • Torque Transmission: 6720
  • Axial Movement: No
  • Bore Tolerance: 120.1
  • Component Bore Diameter: 120mm
  • Hub Pressure: 155
  • 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: 80mm
  • Shaft Tolerance: 79.9
  • Taper: Double
  • Thrust: 167988

Image of B-LOC B400 140mm

  • Series: B400
  • Torque Transmission: 28161
  • Axial Movement: No
  • Bore Tolerance: 190.1
  • Component Bore Diameter: 190mm
  • Hub Pressure: 165
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 35
  • Self-Centering: No
  • Shaft Diameter: 140mm
  • Shaft Tolerance: 139.9
  • Taper: Double
  • Thrust: 402283

Image of B-LOC B400 160mm

  • Series: B400
  • Torque Transmission: 38033
  • Axial Movement: No
  • Bore Tolerance: 210.1
  • Component Bore Diameter: 210mm
  • Hub Pressure: 177
  • Installation Torque: 123 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 35
  • Self-Centering: No
  • Shaft Diameter: 160mm
  • Shaft Tolerance: 159.9
  • Taper: Double
  • Thrust: 475425

Image of B-LOC B400 180mm

  • Series: B400
  • Torque Transmission: 51694
  • Axial Movement: No
  • Bore Tolerance: 235.1
  • Component Bore Diameter: 235mm
  • Hub Pressure: 171
  • Installation Torque: 187 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M14 x 40
  • Self-Centering: No
  • Shaft Diameter: 180mm
  • Shaft Tolerance: 179.87
  • Taper: Double
  • Thrust: 574350

Image of B-LOC B400 55mm

B-LOC B400 55mm

More Information

  • Series: B400
  • Torque Transmission: 2889
  • Axial Movement: No
  • Bore Tolerance: 85.08
  • Component Bore Diameter: 85mm
  • Hub Pressure: 164
  • Installation Torque: 35 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Releasing
  • Screw Size: M8 x 22
  • Self-Centering: No
  • Shaft Diameter: 55mm
  • Shaft Tolerance: 54.92
  • Taper: Double
  • Thrust: 105083
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