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Bellows Couplings for Automation & Linear Motion
Ruland bellows couplings are made of two lightweight anodized aluminum hubs joined by a flexible stainless steel bellows. The thin walls of the bellows allow the coupling to flex under misalignment while remaining rigid under torsional loads. Engineers designing precision linear systems often prefer to use bellows couplings because they are lightweight, accommodate all forms of misalignment, and have the greatest size-for-size torque and torsional stiffness of any Ruland flexible coupling.
Ruland manufactures bellows couplings with a low inertia, zero-backlash design, making them a suitable option for high torque applications where a rigid coupling is not feasible due to weight or misalignment requirements. They are available in clamp and set screw hubs with or without keyways in bore sizes ranging from 1/8” to 1” and 3mm to 25mm.
Products
Download CAD File:
BC21-5/8\"-15MM-A
BC21-5/8"-15MM-A
As low as
$94.83
$139.09
Ruland BC21-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC26-3/4\"-15MM-A
BC26-3/4"-15MM-A
As low as
$105.39
$154.57
Ruland BC26-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-5/8\"-15MM-A
BC26-5/8"-15MM-A
As low as
$105.39
$154.57
Ruland BC26-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-1\"-15MM-A
BC32-1"-15MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-15MM-A, 1" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-3/4\"-15MM-A
BC32-3/4"-15MM-A
As low as
$126.47
$185.49
Ruland BC32-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-5/8\"-15MM-A
BC32-5/8"-15MM-A
As low as
$126.47
$185.49
Ruland BC32-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-7/8\"-15MM-A
BC32-7/8"-15MM-A
As low as
$126.47
$185.49
Ruland BC32-7/8"-15MM-A, 7/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC36-1 1/4\"-15MM-A
BC36-1 1/4"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-1 1/4"-15MM-A, 1 1/4" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-1 1/8\"-15MM-A
BC36-1 1/8"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-1 1/8"-15MM-A, 1 1/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-1\"-15MM-A
BC36-1"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-1"-15MM-A, 1" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-3/4\"-15MM-A
BC36-3/4"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-5/8\"-15MM-A
BC36-5/8"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-7/8\"-15MM-A
BC36-7/8"-15MM-A
As low as
$172.38
$252.82
Ruland BC36-7/8"-15MM-A, 7/8" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK21-5/8\"-15MM-A
BCK21-5/8"-15MM-A
As low as
$113.14
$165.94
Ruland BCK21-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BCK26-3/4\"-15MM-A
BCK26-3/4"-15MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-5/8\"-15MM-A
BCK26-5/8"-15MM-A
As low as
$135.16
$198.24
Ruland BCK26-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK32-1\"-15MM-A
BCK32-1"-15MM-A
As low as
$162.57
$238.43
Ruland BCK32-1"-15MM-A, 1" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-3/4\"-15MM-A
BCK32-3/4"-15MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-5/8\"-15MM-A
BCK32-5/8"-15MM-A
As low as
$162.57
$238.43
Ruland BCK32-5/8"-15MM-A, 5/8" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-7/8\"-15MM-A
BCK32-7/8"-15MM-A
As low as
$162.57
$238.43
Ruland BCK32-7/8"-15MM-A, 7/8" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK36-1 1/4\"-15MM-A
BCK36-1 1/4"-15MM-A
As low as
$199.99
$293.32
Ruland BCK36-1 1/4"-15MM-A, 1 1/4" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-1 1/8\"-15MM-A
BCK36-1 1/8"-15MM-A
As low as
$199.99
$293.32
Ruland BCK36-1 1/8"-15MM-A, 1 1/8" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-1\"-15MM-A
BCK36-1"-15MM-A
As low as
$199.99
$293.32
Ruland BCK36-1"-15MM-A, 1" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-3/4\"-15MM-A
BCK36-3/4"-15MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-15MM-A, 3/4" x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC21-5/8"-15MM-A
0.6250 in
15 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC26-3/4"-15MM-A
0.7500 in
15 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-5/8"-15MM-A
0.6250 in
15 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-1"-15MM-A
1.0000 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-3/4"-15MM-A
0.7500 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-5/8"-15MM-A
0.6250 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-7/8"-15MM-A
0.8750 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC36-1 1/4"-15MM-A
1.2500 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-1 1/8"-15MM-A
1.1250 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-1"-15MM-A
1.0000 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-3/4"-15MM-A
0.7500 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-5/8"-15MM-A
0.6250 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-7/8"-15MM-A
0.8750 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK21-5/8"-15MM-A
0.6250 in
15 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BCK26-3/4"-15MM-A
0.7500 in
15 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-5/8"-15MM-A
0.6250 in
15 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK32-1"-15MM-A
1.0000 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-3/4"-15MM-A
0.7500 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-5/8"-15MM-A
0.6250 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-7/8"-15MM-A
0.8750 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK36-1 1/4"-15MM-A
1.2500 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-1 1/8"-15MM-A
1.1250 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-1"-15MM-A
1.0000 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-3/4"-15MM-A
0.7500 in
15 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
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