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Bellows Couplings for Motors
Bellows couplings are zero-backlash and constructed of two anodized aluminum hubs and a stainless steel bellows that serves as the flexible element. This design results in a low inertia zero-backlash coupling that is a good choice for motors coupled to ball screw driven actuators in precision applications. The thin walls of the bellows allow the coupling to flex under misalignment conditions and remain rigid under torsional loads. Bellows couplings have the highest size-for-size torque and torsional stiffness of all Ruland flexible couplings and are preferred in applications where the highest level of accuracy and responsiveness is required.
Ruland bellows coupling have a balanced design for reduced vibration at speeds up to 10,000 RPM. Bore sizes are available from 1/8” to 1” and 3mm to 25mm and hubs are manufactured in clamp and set screw styles with and without keyways.
Products
Download CAD File:
BCK16-1/2\"-10MM-A
BCK16-1/2"-10MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-10MM-A, 1/2" x 10mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-11MM-A
BCK16-1/2"-11MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-11MM-A, 1/2" x 11mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-12MM-A
BCK16-1/2"-12MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-6MM-A
BCK16-1/2"-6MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-6MM-A, 1/2" x 6mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-7MM-A
BCK16-1/2"-7MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-7MM-A, 1/2" x 7mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-8MM-A
BCK16-1/2"-8MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-8MM-A, 1/2" x 8mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-1/2\"-9MM-A
BCK16-1/2"-9MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-9MM-A, 1/2" x 9mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-10MM-1/4\"-A
BCK16-10MM-1/4"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-1/4"-A, 10mm x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-10MM-3/8\"-A
BCK16-10MM-3/8"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-10MM-5/16\"-A
BCK16-10MM-5/16"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-5/16"-A, 10mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-11MM-1/4\"-A
BCK16-11MM-1/4"-A
As low as
$104.27
$152.92
Ruland BCK16-11MM-1/4"-A, 11mm x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-11MM-3/8\"-A
BCK16-11MM-3/8"-A
As low as
$104.27
$152.92
Ruland BCK16-11MM-3/8"-A, 11mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-11MM-5/16\"-A
BCK16-11MM-5/16"-A
As low as
$104.27
$152.92
Ruland BCK16-11MM-5/16"-A, 11mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-12MM-1/4\"-A
BCK16-12MM-1/4"-A
As low as
$104.27
$152.92
Ruland BCK16-12MM-1/4"-A, 12mm x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-12MM-3/8\"-A
BCK16-12MM-3/8"-A
As low as
$104.27
$152.92
Ruland BCK16-12MM-3/8"-A, 12mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-12MM-5/16\"-A
BCK16-12MM-5/16"-A
As low as
$104.27
$152.92
Ruland BCK16-12MM-5/16"-A, 12mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-3/8\"-6MM-A
BCK16-3/8"-6MM-A
As low as
$104.27
$152.92
Ruland BCK16-3/8"-6MM-A, 3/8" x 6mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-3/8\"-7MM-A
BCK16-3/8"-7MM-A
As low as
$104.27
$152.92
Ruland BCK16-3/8"-7MM-A, 3/8" x 7mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-3/8\"-8MM-A
BCK16-3/8"-8MM-A
As low as
$104.27
$152.92
Ruland BCK16-3/8"-8MM-A, 3/8" x 8mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-3/8\"-9MM-A
BCK16-3/8"-9MM-A
As low as
$104.27
$152.92
Ruland BCK16-3/8"-9MM-A, 3/8" x 9mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-6-4-A
BCK16-6-4-A
As low as
$104.27
$152.92
Ruland BCK16-6-4-A, 3/8" x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Download CAD File:
BCK16-6-5-A
BCK16-6-5-A
As low as
$104.27
$152.92
Ruland BCK16-6-5-A, 3/8" x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Download CAD File:
BCK16-6-6-A
BCK16-6-6-A
As low as
$104.27
$152.92
Ruland BCK16-6-6-A, 3/8" x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Download CAD File:
BCK16-8-4-A
BCK16-8-4-A
As low as
$104.27
$152.92
Ruland BCK16-8-4-A, 1/2" x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BCK16-1/2"-10MM-A
0.5000 in
10 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-11MM-A
0.5000 in
11 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-12MM-A
0.5000 in
12 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-6MM-A
0.5000 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-7MM-A
0.5000 in
7 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-8MM-A
0.5000 in
8 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-1/2"-9MM-A
0.5000 in
9 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-10MM-1/4"-A
10 mm
0.2500 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-10MM-3/8"-A
10 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-10MM-5/16"-A
10 mm
0.3125 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-11MM-1/4"-A
11 mm
0.2500 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-11MM-3/8"-A
11 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-11MM-5/16"-A
11 mm
0.3125 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-12MM-1/4"-A
12 mm
0.2500 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-12MM-3/8"-A
12 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-12MM-5/16"-A
12 mm
0.3125 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-3/8"-6MM-A
0.3750 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-3/8"-7MM-A
0.3750 in
7 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-3/8"-8MM-A
0.3750 in
8 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-3/8"-9MM-A
0.3750 in
9 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-6-4-A
0.3750 in
0.2500 in
1.345 in
Aluminum
1.000 in
10,000 RPM
BCK16-6-5-A
0.3750 in
0.3125 in
1.345 in
Aluminum
1.000 in
10,000 RPM
BCK16-6-6-A
0.3750 in
0.3750 in
1.345 in
Aluminum
1.000 in
10,000 RPM
BCK16-8-4-A
0.5000 in
0.2500 in
1.345 in
Aluminum
1.000 in
10,000 RPM
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