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Bellows Couplings for Encoders
Ruland bellows couplings are comprised of two anodized aluminum and a stainless steel bellows creating a low inertia zero-backlash coupling that is well suited for speeds up to 10,000 RPM. The thin wall of the bellows allows the coupling to remain flexible under misalignment conditions while maintaining rigidity under torsional loads. They are the most torsionally stiff flexible coupling Ruland offers making them a good fit for encoders that require the highest level of resolution. When designers select a bellows coupling for an encoder they must control for misalignment. While bellows couplings to accommodate all forms of misalignment, they are not as flexible as beam or controlflex types. Bellows couplings are manufactured in our Marlborough, Massachusetts factory with bore sizes ranging from 1/8” to 1” or 3mm to 25mm.
Products
Download CAD File:
BC26-3/4\"-18MM-A
BC26-3/4"-18MM-A
As low as
$105.39
$154.57
Ruland BC26-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-1\"-18MM-A
BC32-1"-18MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-18MM-A, 1" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-3/4\"-18MM-A
BC32-3/4"-18MM-A
As low as
$126.47
$185.49
Ruland BC32-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-7/8\"-18MM-A
BC32-7/8"-18MM-A
As low as
$126.47
$185.49
Ruland BC32-7/8"-18MM-A, 7/8" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC36-1 1/4\"-18MM-A
BC36-1 1/4"-18MM-A
As low as
$172.38
$252.82
Ruland BC36-1 1/4"-18MM-A, 1 1/4" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-1 1/8\"-18MM-A
BC36-1 1/8"-18MM-A
As low as
$172.38
$252.82
Ruland BC36-1 1/8"-18MM-A, 1 1/8" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-1\"-18MM-A
BC36-1"-18MM-A
As low as
$172.38
$252.82
Ruland BC36-1"-18MM-A, 1" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-3/4\"-18MM-A
BC36-3/4"-18MM-A
As low as
$172.38
$252.82
Ruland BC36-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-7/8\"-18MM-A
BC36-7/8"-18MM-A
As low as
$172.38
$252.82
Ruland BC36-7/8"-18MM-A, 7/8" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK26-3/4\"-18MM-A
BCK26-3/4"-18MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK32-1\"-18MM-A
BCK32-1"-18MM-A
As low as
$162.57
$238.43
Ruland BCK32-1"-18MM-A, 1" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-3/4\"-18MM-A
BCK32-3/4"-18MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-7/8\"-18MM-A
BCK32-7/8"-18MM-A
As low as
$162.57
$238.43
Ruland BCK32-7/8"-18MM-A, 7/8" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK36-1 1/4\"-18MM-A
BCK36-1 1/4"-18MM-A
As low as
$199.99
$293.32
Ruland BCK36-1 1/4"-18MM-A, 1 1/4" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-1 1/8\"-18MM-A
BCK36-1 1/8"-18MM-A
As low as
$199.99
$293.32
Ruland BCK36-1 1/8"-18MM-A, 1 1/8" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-1\"-18MM-A
BCK36-1"-18MM-A
As low as
$199.99
$293.32
Ruland BCK36-1"-18MM-A, 1" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-3/4\"-18MM-A
BCK36-3/4"-18MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-18MM-A, 3/4" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-7/8\"-18MM-A
BCK36-7/8"-18MM-A
As low as
$199.99
$293.32
Ruland BCK36-7/8"-18MM-A, 7/8" x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
MBC41-18-18-A
MBC41-18-18-A
As low as
$105.39
$154.57
Ruland MBC41-18-18-A, 18mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 41.3mm, OD 51.7mm Length
Download CAD File:
MBC41-19-18-A
MBC41-19-18-A
As low as
$105.39
$154.57
Ruland MBC41-19-18-A, 19mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 41.3mm, OD 51.7mm Length
Download CAD File:
MBC41-20-18-A
MBC41-20-18-A
As low as
$105.39
$154.57
Ruland MBC41-20-18-A, 20mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 41.3mm, OD 51.7mm Length
Download CAD File:
MBC51-18-18-A
MBC51-18-18-A
As low as
$126.47
$185.49
Ruland MBC51-18-18-A, 18mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
Download CAD File:
MBC51-19-18-A
MBC51-19-18-A
As low as
$126.47
$185.49
Ruland MBC51-19-18-A, 19mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
Download CAD File:
MBC51-20-18-A
MBC51-20-18-A
As low as
$126.47
$185.49
Ruland MBC51-20-18-A, 20mm x 18mm Bellows Coupling, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC26-3/4"-18MM-A
0.7500 in
18 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-1"-18MM-A
1.0000 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-3/4"-18MM-A
0.7500 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-7/8"-18MM-A
0.8750 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC36-1 1/4"-18MM-A
1.2500 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-1 1/8"-18MM-A
1.1250 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-1"-18MM-A
1.0000 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-3/4"-18MM-A
0.7500 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-7/8"-18MM-A
0.8750 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK26-3/4"-18MM-A
0.7500 in
18 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK32-1"-18MM-A
1.0000 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-3/4"-18MM-A
0.7500 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-7/8"-18MM-A
0.8750 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK36-1 1/4"-18MM-A
1.2500 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-1 1/8"-18MM-A
1.1250 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-1"-18MM-A
1.0000 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-3/4"-18MM-A
0.7500 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-7/8"-18MM-A
0.8750 in
18 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
MBC41-18-18-A
18 mm
18 mm
51.7 mm
Aluminum
41.3 mm
10,000 RPM
MBC41-19-18-A
19 mm
18 mm
51.7 mm
Aluminum
41.3 mm
10,000 RPM
MBC41-20-18-A
20 mm
18 mm
51.7 mm
Aluminum
41.3 mm
10,000 RPM
MBC51-18-18-A
18 mm
18 mm
61.3 mm
Aluminum
50.8 mm
10,000 RPM
MBC51-19-18-A
19 mm
18 mm
61.3 mm
Aluminum
50.8 mm
10,000 RPM
MBC51-20-18-A
20 mm
18 mm
61.3 mm
Aluminum
50.8 mm
10,000 RPM
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Small Bore (B2)
18 mm
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