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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 >>

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Image of B-LOC B103 2"

B-LOC B103 2"

More Information

  • Series: B103
  • Torque Transmission: 1771 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.152
  • Compliancy: RoHS
  • Component Bore Diameter: 3.15"
  • Hub Pressure: 22729
  • 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"
  • Shaft Tolerance: 1.998
  • Taper: Single
  • Thrust: 21250

Image of B-LOC B103 1"

B-LOC B103 1"

More Information

  • Series: B103
  • Torque Transmission: 396 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 1.971
  • Compliancy: RoHS
  • Component Bore Diameter: 1.969"
  • Hub Pressure: 19130
  • Installation Torque: 10 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 1"
  • Shaft Tolerance: 0.998
  • Taper: Single
  • Thrust: 9502

Image of B-LOC B103 1-11/16"

  • Series: B103
  • Torque Transmission: 1494 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.955
  • Compliancy: RoHS
  • Component Bore Diameter: 2.953"
  • Hub Pressure: 24245
  • 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: 1 11/16"
  • Shaft Tolerance: 1.6855
  • Taper: Single
  • Thrust: 21250

Image of B-LOC B103 1-3/16"

  • Series: B103
  • Torque Transmission: 470 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.167
  • Compliancy: RoHS
  • Component Bore Diameter: 2.165"
  • Hub Pressure: 17391
  • Installation Torque: 10 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 1 3/16"
  • Shaft Tolerance: 1.1855
  • Taper: Single
  • Thrust: 9502

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

  • Series: B103
  • Torque Transmission: 792 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.561
  • Compliancy: RoHS
  • Component Bore Diameter: 2.559"
  • Hub Pressure: 19621
  • Installation Torque: 10 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 1 1/2"
  • Shaft Tolerance: 1.498
  • Taper: Single
  • Thrust: 12669

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

  • Series: B103
  • Torque Transmission: 1550 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.955
  • Compliancy: RoHS
  • Component Bore Diameter: 2.953"
  • Hub Pressure: 24245
  • 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: 1 3/4"
  • Shaft Tolerance: 1.748
  • Taper: Single
  • Thrust: 21250

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 1-15/16"

  • Series: B103
  • Torque Transmission: 1716 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.152
  • Component Bore Diameter: 3.15"
  • Hub Pressure: 22729
  • 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: 1 15/16"
  • Shaft Tolerance: 1.9355
  • Taper: Single
  • Thrust: 21250

Image of B-LOC B103 1-5/8"

  • Series: B103
  • Torque Transmission: 1439 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.955
  • Compliancy: RoHS
  • Component Bore Diameter: 2.953"
  • Hub Pressure: 24245
  • 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: 1 5/8"
  • Shaft Tolerance: 1.623
  • Taper: Single
  • Thrust: 21250

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

  • Series: B103
  • Torque Transmission: 445 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.167
  • Compliancy: RoHS
  • Component Bore Diameter: 2.165"
  • Hub Pressure: 17391
  • Installation Torque: 10 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 1 1/8"
  • Shaft Tolerance: 1.123
  • Taper: Single
  • Thrust: 9502

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 1-3/8"

  • Series: B103
  • Torque Transmission: 726 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 2.364
  • Compliancy: RoHS
  • Component Bore Diameter: 2.362"
  • Hub Pressure: 21256
  • Installation Torque: 10 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M6 x 20
  • Self-Centering: Yes
  • Shaft Diameter: 1 3/8"
  • Shaft Tolerance: 1.373
  • Taper: Single
  • Thrust: 12669

Image of B-LOC B103 1-7/8"

  • Series: B103
  • Torque Transmission: 1660 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 3.152
  • Compliancy: RoHS
  • Component Bore Diameter: 3.15"
  • Hub Pressure: 22729
  • 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: 1 7/8"
  • Shaft Tolerance: 1.873
  • Taper: Single
  • Thrust: 21250

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
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