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.

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Image of B-LOC B103 3"

B-LOC B103 3"

More Information

  • Series: B103
  • Torque Transmission: 4923 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.727
  • Compliancy: RoHS
  • Component Bore Diameter: 4.724"
  • Hub Pressure: 23404
  • Installation Torque: 50 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 30
  • Self-Centering: Yes
  • Shaft Diameter: 3"
  • Shaft Tolerance: 2.997
  • Taper: Single
  • Thrust: 39387

Image of B-LOC B400 2-7/16"

  • Series: B400
  • Torque Transmission: 2762
  • Axial Movement: No
  • Bore Tolerance: 3.743
  • Component Bore Diameter: 3.74"
  • Hub Pressure: 24491
  • 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 7/16"
  • Shaft Tolerance: 2.4345
  • Taper: Double
  • Thrust: 27191

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 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 B400 2"

B-LOC B400 2"

More Information

  • Series: B400
  • Torque Transmission: 1983
  • Axial Movement: No
  • Bore Tolerance: 3.349
  • Component Bore Diameter: 3.346"
  • Hub Pressure: 23951
  • 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"
  • Shaft Tolerance: 1.997
  • Taper: Double
  • Thrust: 23792

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

Image of B-LOC B103 2-3/8"

  • Series: B103
  • Torque Transmission: 2403 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.545
  • Compliancy: RoHS
  • Component Bore Diameter: 3.543"
  • Hub Pressure: 23090
  • 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 3/8"
  • Shaft Tolerance: 2.373
  • Taper: Single
  • Thrust: 24286

Image of B-LOC B103 2-1/8"

  • Series: B103
  • Torque Transmission: 2150 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 1/8"
  • Shaft Tolerance: 2.123
  • Taper: Single
  • Thrust: 24286

Image of B-LOC B103 2-1/2"

  • Series: B103
  • Torque Transmission: 2846 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.742
  • Compliancy: RoHS
  • Component Bore Diameter: 3.74"
  • Hub Pressure: 24609
  • 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 1/2"
  • Shaft Tolerance: 2.498
  • Taper: Single
  • Thrust: 27322

Image of B-LOC B400 3-1/8"

  • Series: B400
  • Torque Transmission: 4928
  • Axial Movement: No
  • Bore Tolerance: 4.728
  • Component Bore Diameter: 4.724"
  • Hub Pressure: 22487
  • 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 1/8"
  • Shaft Tolerance: 3.121
  • Taper: Double
  • Thrust: 37844

Image of B-LOC B400 3-7/8"

  • Series: B400
  • Torque Transmission: 9320
  • Axial Movement: No
  • Bore Tolerance: 5.713
  • Component Bore Diameter: 5.709"
  • Hub Pressure: 26204
  • Installation Torque: 91 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Releasing
  • Screw Size: M12 x 30
  • Self-Centering: No
  • Shaft Diameter: 3 7/8"
  • Shaft Tolerance: 3.871
  • Taper: Double
  • Thrust: 57726

Image of B-LOC B400 3-7/16"

  • Series: B400
  • Torque Transmission: 6195
  • Axial Movement: No
  • Bore Tolerance: 5.122
  • Component Bore Diameter: 5.118"
  • Hub Pressure: 23723
  • 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 7/16"
  • Shaft Tolerance: 3.4335
  • Taper: Double
  • Thrust: 43250

Image of B-LOC B103 3-7/16"

  • Series: B103
  • Torque Transmission: 6347 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 5.121
  • Compliancy: RoHS
  • Component Bore Diameter: 5.118"
  • Hub Pressure: 24305
  • Installation Torque: 50 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 30
  • Self-Centering: Yes
  • Shaft Diameter: 3 7/16"
  • Shaft Tolerance: 3.4345
  • Taper: Single
  • Thrust: 44311

Image of B-LOC B103 3-1/2"

  • Series: B103
  • Torque Transmission: 6462 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 5.121
  • Compliancy: RoHS
  • Component Bore Diameter: 5.118"
  • Hub Pressure: 24305
  • Installation Torque: 50 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 30
  • Self-Centering: Yes
  • Shaft Diameter: 3 1/2"
  • Shaft Tolerance: 3.497
  • Taper: Single
  • Thrust: 44311

Image of B-LOC B103 4"

B-LOC B103 4"

More Information

  • Series: B103
  • Torque Transmission: 10101 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 5.712
  • Compliancy: RoHS
  • Component Bore Diameter: 5.709"
  • Hub Pressure: 27512
  • Installation Torque: 90 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: 60608
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