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 B103 15mm

B-LOC B103 15mm

More Information

  • Series: B103
  • Torque Transmission: 115 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 32.05
  • Compliancy: RoHS
  • Component Bore Diameter: 32mm
  • Hub Pressure: 91
  • Installation Torque: 5 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M4 x 12
  • Self-Centering: Yes
  • Shaft Diameter: 15mm
  • Shaft Tolerance: 14.95
  • Taper: Single
  • Thrust: 15930

Image of B-LOC B103 18mm

B-LOC B103 18mm

More Information

  • Series: B103
  • Torque Transmission: 327 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 47.05
  • Compliancy: RoHS
  • Component Bore Diameter: 47mm
  • Hub Pressure: 121
  • Installation Torque: 14 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 18mm
  • Shaft Tolerance: 17.95
  • Taper: Single
  • Thrust: 36371

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 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

Image of B-LOC B103 3-1/4"

  • Series: B103
  • Torque Transmission: 6000 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.924
  • Compliancy: RoHS
  • Component Bore Diameter: 4.921"
  • Hub Pressure: 25277
  • 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 1/4"
  • Shaft Tolerance: 3.247
  • Taper: Single
  • Thrust: 44311

Image of B-LOC B103 3-15/16"

  • Series: B103
  • Torque Transmission: 9944 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: 3 15/16"
  • Shaft Tolerance: 3.9345
  • Taper: Single
  • Thrust: 60608

Image of B-LOC B103 2-11/16"

  • Series: B103
  • Torque Transmission: 4411 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.333
  • Compliancy: RoHS
  • Component Bore Diameter: 4.331"
  • Hub Pressure: 25532
  • 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: 2 11/16"
  • Shaft Tolerance: 2.6855
  • Taper: Single
  • Thrust: 39387

Image of B-LOC B103 2-7/16"

  • Series: B103
  • Torque Transmission: 2775 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 7/16"
  • Shaft Tolerance: 2.4355
  • Taper: Single
  • Thrust: 27322

Image of B-LOC B103 19mm

B-LOC B103 19mm

More Information

  • Series: B103
  • Torque Transmission: 346 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 47.05
  • Compliancy: RoHS
  • Component Bore Diameter: 47mm
  • Hub Pressure: 121
  • Installation Torque: 14 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 19mm
  • Shaft Tolerance: 18.95
  • Taper: Single
  • Thrust: 36371

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

  • Series: B103
  • Torque Transmission: 6231 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.924
  • Compliancy: RoHS
  • Component Bore Diameter: 4.921"
  • Hub Pressure: 25277
  • 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 3/8"
  • Shaft Tolerance: 3.372
  • Taper: Single
  • Thrust: 44311
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