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:
BC26-20MM-3/4\"-A
BC26-20MM-3/4"-A
As low as
$105.39
$154.57
Ruland BC26-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-20MM-3/4\"-A
BC32-20MM-3/4"-A
As low as
$126.47
$185.49
Ruland BC32-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-22MM-3/4\"-A
BC32-22MM-3/4"-A
As low as
$126.47
$185.49
Ruland BC32-22MM-3/4"-A, 22mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-24MM-3/4\"-A
BC32-24MM-3/4"-A
As low as
$126.47
$185.49
Ruland BC32-24MM-3/4"-A, 24mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-25MM-3/4\"-A
BC32-25MM-3/4"-A
As low as
$126.47
$185.49
Ruland BC32-25MM-3/4"-A, 25mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC36-20MM-3/4\"-A
BC36-20MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-22MM-3/4\"-A
BC36-22MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-22MM-3/4"-A, 22mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-24MM-3/4\"-A
BC36-24MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-24MM-3/4"-A, 24mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-25MM-3/4\"-A
BC36-25MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-25MM-3/4"-A, 25mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-28MM-3/4\"-A
BC36-28MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-28MM-3/4"-A, 28mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-30MM-3/4\"-A
BC36-30MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-30MM-3/4"-A, 30mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-32MM-3/4\"-A
BC36-32MM-3/4"-A
As low as
$172.38
$252.82
Ruland BC36-32MM-3/4"-A, 32mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC44-20MM-3/4\"-A
BC44-20MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-22MM-3/4\"-A
BC44-22MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-22MM-3/4"-A, 22mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-24MM-3/4\"-A
BC44-24MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-24MM-3/4"-A, 24mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-25MM-3/4\"-A
BC44-25MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-25MM-3/4"-A, 25mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-28MM-3/4\"-A
BC44-28MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-28MM-3/4"-A, 28mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-30MM-3/4\"-A
BC44-30MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-30MM-3/4"-A, 30mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-32MM-3/4\"-A
BC44-32MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-32MM-3/4"-A, 32mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-35MM-3/4\"-A
BC44-35MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-3/4"-A, 35mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-38MM-3/4\"-A
BC44-38MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-38MM-3/4"-A, 38mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK26-20MM-3/4\"-A
BCK26-20MM-3/4"-A
As low as
$135.16
$198.24
Ruland BCK26-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK32-20MM-3/4\"-A
BCK32-20MM-3/4"-A
As low as
$162.57
$238.43
Ruland BCK32-20MM-3/4"-A, 20mm x 3/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-22MM-3/4\"-A
BCK32-22MM-3/4"-A
As low as
$162.57
$238.43
Ruland BCK32-22MM-3/4"-A, 22mm x 3/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC26-20MM-3/4"-A
20 mm
0.7500 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-20MM-3/4"-A
20 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-22MM-3/4"-A
22 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-24MM-3/4"-A
24 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-25MM-3/4"-A
25 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC36-20MM-3/4"-A
20 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-22MM-3/4"-A
22 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-24MM-3/4"-A
24 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-25MM-3/4"-A
25 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-28MM-3/4"-A
28 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-30MM-3/4"-A
30 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-32MM-3/4"-A
32 mm
0.7500 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC44-20MM-3/4"-A
20 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-22MM-3/4"-A
22 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-24MM-3/4"-A
24 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-25MM-3/4"-A
25 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-28MM-3/4"-A
28 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-30MM-3/4"-A
30 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-32MM-3/4"-A
32 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-35MM-3/4"-A
35 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-38MM-3/4"-A
38 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK26-20MM-3/4"-A
20 mm
0.7500 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK32-20MM-3/4"-A
20 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-22MM-3/4"-A
22 mm
0.7500 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
Filter
Now Shopping by
Small Bore (B2)
0.7500 in
Shopping Options
© 2024 Ruland Manufacturing Co., Inc. All rights reserved
Top 
