The store will not work correctly in the case when cookies are disabled.
JavaScript seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Javascript in your browser.
Due to Microsoft's discontinuation of updates, including security, certain functionality such as checkout and CAD may not work for you. We recommend using Google Chrome, Microsoft Edge, Firefox, or Safari to ensure full functionality.Thank you - the Ruland team
Bellows Coupling: Inch to Metric
Bellows couplings with inch to metric bore combinations are available with clamp style hubs with or without keyways in bore dimensions ranging from 1/8" (3mm) to 1-3/4" (45mm). Stainless steel hubs and other custom features are available by special order.
Features High torque with low inertia
Balanced design for high RPM
Long Life with no maintenance
High torsional stiffness
Constant velocity
Zero backlash
RoHS3 and REACH Compliant
Maximum speed: 10,000 RPM
Bore tolerance:
+.001 in / -.000 in
+.03mm/–.000mm
Temperature Range: -40°F to 200°F
Material
Aluminum hubs are standard
Stainless steel hubs available upon request
How to Specify Part numbers are in the following format with numbers representing sixteenths of an inch or millimeters:
Products
Download CAD File:
BC16-1/2\"-10MM-A
BC16-1/2"-10MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-10MM-A, 1/2" x 10mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-11MM-A
BC16-1/2"-11MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-11MM-A, 1/2" x 11mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-12MM-A
BC16-1/2"-12MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-6MM-A
BC16-1/2"-6MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-6MM-A, 1/2" x 6mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-7MM-A
BC16-1/2"-7MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-7MM-A, 1/2" x 7mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-8MM-A
BC16-1/2"-8MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-8MM-A, 1/2" x 8mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/2\"-9MM-A
BC16-1/2"-9MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-9MM-A, 1/2" x 9mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC21-1/2\"-10MM-A
BC21-1/2"-10MM-A
As low as
$94.83
$139.09
Ruland BC21-1/2"-10MM-A, 1/2" x 10mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-1/2\"-11MM-A
BC21-1/2"-11MM-A
As low as
$94.83
$139.09
Ruland BC21-1/2"-11MM-A, 1/2" x 11mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-1/2\"-12MM-A
BC21-1/2"-12MM-A
As low as
$94.83
$139.09
Ruland BC21-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-1/2\"-8MM-A
BC21-1/2"-8MM-A
As low as
$94.83
$139.09
Ruland BC21-1/2"-8MM-A, 1/2" x 8mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-1/2\"-9MM-A
BC21-1/2"-9MM-A
As low as
$94.83
$139.09
Ruland BC21-1/2"-9MM-A, 1/2" x 9mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC26-1/2\"-10MM-A
BC26-1/2"-10MM-A
As low as
$105.39
$154.57
Ruland BC26-1/2"-10MM-A, 1/2" x 10mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-1/2\"-11MM-A
BC26-1/2"-11MM-A
As low as
$105.39
$154.57
Ruland BC26-1/2"-11MM-A, 1/2" x 11mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-1/2\"-12MM-A
BC26-1/2"-12MM-A
As low as
$105.39
$154.57
Ruland BC26-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-1/2\"-12MM-A
BC32-1/2"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
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:
BCK21-1/2\"-10MM-A
BCK21-1/2"-10MM-A
As low as
$113.14
$165.94
Ruland BCK21-1/2"-10MM-A, 1/2" x 10mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC16-1/2"-10MM-A
0.5000 in
10 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-11MM-A
0.5000 in
11 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-12MM-A
0.5000 in
12 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-6MM-A
0.5000 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-7MM-A
0.5000 in
7 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-8MM-A
0.5000 in
8 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/2"-9MM-A
0.5000 in
9 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC21-1/2"-10MM-A
0.5000 in
10 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-1/2"-11MM-A
0.5000 in
11 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-1/2"-12MM-A
0.5000 in
12 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-1/2"-8MM-A
0.5000 in
8 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-1/2"-9MM-A
0.5000 in
9 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC26-1/2"-10MM-A
0.5000 in
10 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-1/2"-11MM-A
0.5000 in
11 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-1/2"-12MM-A
0.5000 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-1/2"-12MM-A
0.5000 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
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
BCK21-1/2"-10MM-A
0.5000 in
10 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
Filter
Now Shopping by
Bore (B1)
0.5000 in
Shopping Options
© 2024 Ruland Manufacturing Co., Inc. All rights reserved
Top 
