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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 B106 2-7/8"

  • Series: B106
  • Torque Transmission: 3573
  • Axial Movement: No
  • Bore Tolerance: 4.53
  • Compliancy: RoHS
  • Component Bore Diameter: 4.528"
  • Hub Pressure: 18496
  • Installation Torque: 60 ft lb
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Inch
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 30
  • Self-Centering: Yes
  • Shaft Diameter: 2 7/8"
  • Shaft Tolerance: 2.873
  • Taper: Single
  • Thrust: 29831

Image of B-LOC B106 75mm

B-LOC B106 75mm

More Information

  • Series: B106
  • Torque Transmission: 4955
  • Axial Movement: No
  • Bore Tolerance: 115.05
  • Compliancy: RoHS
  • Component Bore Diameter: 115mm
  • Hub Pressure: 127
  • Installation Torque: 81 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M10 x 30
  • Self-Centering: Yes
  • Shaft Diameter: 75mm
  • Shaft Tolerance: 74.95
  • Taper: Single
  • Thrust: 132127

Image of B-LOC B106 3-3/8"

  • Series: B106
  • Torque Transmission: 4719
  • Axial Movement: No
  • Bore Tolerance: 4.924
  • Compliancy: RoHS
  • Component Bore Diameter: 4.921"
  • Hub Pressure: 19144
  • Installation Torque: 60 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: 33559

Image of B-LOC B106 3"

B-LOC B106 3"

More Information

  • Series: B106
  • Torque Transmission: 3729
  • Axial Movement: No
  • Bore Tolerance: 4.531
  • Compliancy: RoHS
  • Component Bore Diameter: 4.724"
  • Hub Pressure: 17726
  • Installation Torque: 60 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: 29831

Image of B-LOC B106 63mm

B-LOC B106 63mm

More Information

  • Series: B106
  • Torque Transmission: 2923
  • Axial Movement: No
  • Bore Tolerance: 95.05
  • Compliancy: RoHS
  • Component Bore Diameter: 95mm
  • Hub Pressure: 130
  • Installation Torque: 41 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 63mm
  • Shaft Tolerance: 62.95
  • Taper: Single
  • Thrust: 92786

Image of B-LOC B106 2-1/4"

  • Series: B106
  • Torque Transmission: 1724
  • Axial Movement: No
  • Bore Tolerance: 3.545
  • Compliancy: RoHS
  • Component Bore Diameter: 3.543"
  • Hub Pressure: 17487
  • 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 1/4"
  • Shaft Tolerance: 2.248
  • Taper: Single
  • Thrust: 18393

Image of B-LOC B106 2-3/16"

  • Series: B106
  • Torque Transmission: 1676
  • 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 3/16"
  • Shaft Tolerance: 2.1855
  • Taper: Single
  • Thrust: 18393

Image of B-LOC B103 50mm

B-LOC B103 50mm

More Information

  • Series: B103
  • Torque Transmission: 2371 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 80.05
  • Compliancy: RoHS
  • Component Bore Diameter: 80mm
  • Hub Pressure: 157
  • 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: 50mm
  • Shaft Tolerance: 49.95
  • Taper: Single
  • Thrust: 94822

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 45mm

B-LOC B103 45mm

More Information

  • Series: B103
  • Torque Transmission: 2133 Nm
  • Axial Movement: Approximately 0.8 mm
  • Bore Tolerance: 75.05
  • Compliancy: RoHS
  • Component Bore Diameter: 75mm
  • Hub Pressure: 168
  • 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: 45mm
  • Shaft Tolerance: 44.95
  • Taper: Single
  • Thrust: 94822

Image of B-LOC B106 65mm

B-LOC B106 65mm

More Information

  • Series: B106
  • Torque Transmission: 3016
  • Axial Movement: No
  • Bore Tolerance: 95.05
  • Compliancy: RoHS
  • Component Bore Diameter: 95mm
  • Hub Pressure: 130
  • Installation Torque: 41 Nm
  • Internal/ External: Internal
  • Material: Steel
  • Metric/Inch: Metric
  • Releasing/ Locking: Locking
  • Screw Size: M8 x 25
  • Self-Centering: Yes
  • Shaft Diameter: 65mm
  • Shaft Tolerance: 64.95
  • Taper: Single
  • Thrust: 92786

Image of B-LOC B103 2-7/8"

  • Series: B103
  • Torque Transmission: 4718 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.53
  • Compliancy: RoHS
  • Component Bore Diameter: 4.528"
  • Hub Pressure: 24422
  • 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 7/8"
  • Shaft Tolerance: 2.873
  • Taper: Single
  • Thrust: 39387

Image of B-LOC B103 2-15/16"

  • Series: B103
  • Torque Transmission: 4821 ft lb
  • Axial Movement: Approximately 0.032"
  • Bore Tolerance: 4.53
  • Compliancy: RoHS
  • Component Bore Diameter: 4.528"
  • Hub Pressure: 24422
  • 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 15/16"
  • Shaft Tolerance: 2.9355
  • Taper: Single
  • Thrust: 39387

Image of B-LOC B106 3-1/4"

  • Series: B106
  • Torque Transmission: 4545
  • Axial Movement: No
  • Bore Tolerance: 4.727
  • Compliancy: RoHS
  • Component Bore Diameter: 4.921"
  • Hub Pressure: 19144
  • Installation Torque: 60 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: 33559

Image of B-LOC B103 2-9/16"

  • Series: B103
  • Torque Transmission: 2917 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 9/16"
  • Shaft Tolerance: 2.5605
  • Taper: Single
  • Thrust: 27322
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