Series BC – Flexible Metal Bellows Couplings

The Series BC flexible metal bellows couplings provide zero backlash and high torsional rigidity, perfect for servo and other precision applications. For more information on the Series BC flexible metal bellows couplings, see the video below or contact us with the details of the application challenge you are experiencing.

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Flexible Bellows Couplings Overview: Models BC – BCS – BCE – BCC – BCB

Model BC - Bellows Coupling with Clamping Hub
(8 sizes with rated torque from 15-500 Nm)

Design Description: Single radial clamping screw per hub ISO 4762. Any imbalance of the clamping hubs is compensated for balancing by bores located on the inside of the hub.

Bore Diameters: Metric or inch bores from 8 – 80 mm, or 0.3125 – 3.125 inches. Keyways available on request.

Sizes: BC-15, BC-30, BC-60, BC-80, BC-150, BC-200, BC-300, BC-500

Application Example:

Sizing Chart:

BC15306080150200300500
Rated torque (Nm)T KN15306080150200300500
Overall Length (mm)A⁻²59 | 66 | 9969 | 77 | 11383 | 93 | 13094 | 106 | 14395 | 107 | 144105 | 117 | 163111 | 125 | 200133 | 146 | 169
Outside Diameter (mm)B495566818190110124
Fit length (mm)C2227313636414351
Inside diameter possible from ø to ø H7 (mm)D1/D28-2810-3012-3514-4219-4222-4524-6035-60
Fastening screw ISO 4762EM5M6M8M10M10M12M12M16
Tightening Torque of fastening screw (Nm)E815405070120130200
Distance between centerlines (mm)F1719232727313941
Distance (mm)G6.57.59.5111112.51316.5
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Model BCS - Bellows Coupling with Split Clamping Hub
(8 sizes with rated torque from 15-500 Nm)

Design Description: Both clamping hubs are completely separable, due to split hubs and two radial screws ISO 4762 on each hub. The standard BCS model is balanced to 16,000 RPM. Any imbalance of the clamping hubs is compensated for by bores located on the hub.

Bore Diameters: Metric or inch bores from 8 – 80 mm, or 0.3125 – 3.125 inches. Keyways are optional, but not necessary.

Sizes: BCS-15, BCS-30, BCS-60, BCS-80, BCS-150, BCS-200, BCS-300, BCS-500

Application Example:

Sizing Chart:

BCS15306080150200300500
Rated torque (Nm)T KN15306080200500300500
Overall Length (mm)A⁻²59 | 6669 | 7783 | 9394 | 10695 | 107105 | 117111 | 125133 | 146
Outside Diameter (mm)B495566818190110124
Fit length (mm)C16.527313636414351
Inside diameter possible from ø to ø H7 (mm)D1/D28-2810-3012-3514-4219-4222-4524-6035-60
Fastening screw ISO 4762EM5M6M8M10M10M12M12M16
Tightening Torque of fastening screw (Nm)E815405070120130200
Distance between centerlines (mm)F17.519232727313941
Distance (mm)G77.59.5121212.51416.5
Distance (mm)H -229 | 3635 | 4341 | 5147 | 5948 | 6050 | 6255 | 6961 | 75
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Model BCE - Economy Class Bellows Coupling with Clamping Hub
(9 sizes with rated torque from 4.5-500 Nm)

Design Description: With a single ISO 4762 radial clamping screw per hub. Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which will force the clamp into the open position for easy mounting and dismounting.

Bore Diameters: Metric or inch bores from 4 – 62 mm, or 0.1875 – 2.375 inches. Keyways are optional, but not necessary.

Sizes: BCE-4.5, BCE-10, BCE-15, BCE-30, BCE-60, BCE-80, BCE-150, BCE-300, BCE-500

Application Example:

Sizing Chart:

BCE4.51015306080150300500
Rated torque (Nm)T KN4.51015306080150300500
Overall Length (mm)A⁻²40445868799292109114
Outside Diameter (mm)B32404956668282110123
Fit length (mm)C131321.5262832.532.54142.5
Inside diameter possible from ø to ø H7 (mm)D1/D26-166-248-2810-3214-3516-4219-4224-6035-62
Fastening screw ISO 4762EM4M4M5M5M8M10M10M12M16
Tightening Torque of fastening screw (Nm)E44.588407085120200
Distance between centerlines (mm)F111417172327273941
Distance (mm)G556.56.59.511111317
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Model BCC - Economy Class Compact Coupling with Clamping Hub
(6 sizes with rated torque from 15-500 Nm)

Design Description: With a single ISO 4762 radial clamping screw per hub. Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which will force the clamp into the open position for easy mounting and dismounting.

Bore Diameters: Metric or inch bores from 8 – 75 mm, or 0.3125 – 2.875 inches. Keyways are optional, but not necessary.

Sizes: BCC-15, BCC-30, BCC-60, BCC-150, BCC-300, BCC-500

Application Example:

 

Sizing Chart:

 

BCC153060150300500
Rated torque (Nm)T KN153060150300500
Overall Length (mm)A⁻²4858677894100
Outside Diameter (mm)B49566682110123
Fit length (mm)C16.5212327.53434
Inside diameter possible from ø to ø H7 (mm)D1/D28-2812-3214-3519-4224-6032-75
Fastening screw ISO 4762EM5M6M8M10M12M12
Tightening Torque of fastening screw (Nm)8154075120125
Distance between centerlines (mm)F17.52023273945
Distance (mm)G6.57.59.5111313
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Model BCB - Blind Mate Bellows Coupling with Clamping Hub
(7 sizes with rated torque from 15-500 Nm)

Design Description: One side with a single radial clamping screw ISO 4762. One side includes backlash-free clamping hub and tapered press-fit device. Any imbalance of the clamping hub, is compensated for balancing bores located on the inside of the hub. Easy mounting and dismounting. Wear-free press-fit connection. Electrically and thermally insulated.

Bore Diameters: Metric or inch bores from 8 – 60 mm, or 0.3125 – 2.36 inches. Limited keyway availability.

Options: Single position or multi-position configurations.

Sizes: BCB-15, BCB-30, BCB-60, BCB-80, BCB-150, BCB-300, BCB-500

Application Example:

Sizing Chart:

BCB15306080150300500
Rated torque (Nm)T KN15306080150300500
Overall Length (mm)A+.0560 | 6771 | 7985 | 9594 | 10695 | 107114 | 128136 | 149
Outside Diameter (mm)B4955668181110124
Fit length (mm)C122273136364351
Fit length (mm)C228333943435261
Inside diameter possible from ø to ø H7 (mm)D18-2810-3012-3514-4214-4224-6035-60
Inside diameter possible from ø to ø H7 (mm)D28-2210-2512-3214-3814-3824-5835-60
Fastening screw ISO 4762EM5M6M8M10M10M12M16
Tightening Torque of fastening screw (Nm)E815405070130200
Distance between centerlines (mm)F17192327273941
Distance (mm)G6.57.59.511111316.5
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Models Available

Why Choose a Zero Backlash Coupling?

BC Bellows Couplings offer zero backlash & high torsional rigidity – which is ideal for servo and other precision applications. Several designs are available to choose from.

Sample Applications

  • Assembly Machinery

  • Automated Plants

  • CNC Milling/Grinding

  • Industrial Robots

  • Linear Actuators

  • Machine Tools

  • Manipulators

  • Metal Cutting Machinery

  • Packaging Machinery

  • Printing Machinery

  • Robotic Axes

  • Servo Drives

  • Textile Machinery

  • Woodworking Machinery

  • and more…