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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:
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:
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:
BC21-5/8\"-12MM-A
BC21-5/8"-12MM-A
As low as
$94.83
$139.09
Ruland BC21-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) 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:
BC26-3/4\"-12MM-A
BC26-3/4"-12MM-A
As low as
$105.39
$154.57
Ruland BC26-3/4"-12MM-A, 3/4" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-5/8\"-12MM-A
BC26-5/8"-12MM-A
As low as
$105.39
$154.57
Ruland BC26-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-1\"-12MM-A
BC32-1"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-12MM-A, 1" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) 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:
BC32-3/4\"-12MM-A
BC32-3/4"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-3/4"-12MM-A, 3/4" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-5/8\"-12MM-A
BC32-5/8"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-7/8\"-12MM-A
BC32-7/8"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-7/8"-12MM-A, 7/8" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) 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:
BCK21-1/2\"-12MM-A
BCK21-1/2"-12MM-A
As low as
$113.14
$165.94
Ruland BCK21-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BCK21-5/8\"-12MM-A
BCK21-5/8"-12MM-A
As low as
$113.14
$165.94
Ruland BCK21-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BCK26-1/2\"-12MM-A
BCK26-1/2"-12MM-A
As low as
$135.16
$198.24
Ruland BCK26-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-3/4\"-12MM-A
BCK26-3/4"-12MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-12MM-A, 3/4" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-5/8\"-12MM-A
BCK26-5/8"-12MM-A
As low as
$135.16
$198.24
Ruland BCK26-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK32-1\"-12MM-A
BCK32-1"-12MM-A
As low as
$162.57
$238.43
Ruland BCK32-1"-12MM-A, 1" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-1/2\"-12MM-A
BCK32-1/2"-12MM-A
As low as
$162.57
$238.43
Ruland BCK32-1/2"-12MM-A, 1/2" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-3/4\"-12MM-A
BCK32-3/4"-12MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-12MM-A, 3/4" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-5/8\"-12MM-A
BCK32-5/8"-12MM-A
As low as
$162.57
$238.43
Ruland BCK32-5/8"-12MM-A, 5/8" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-7/8\"-12MM-A
BCK32-7/8"-12MM-A
As low as
$162.57
$238.43
Ruland BCK32-7/8"-12MM-A, 7/8" x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
MBC25-12-12-A
MBC25-12-12-A
As low as
$87.82
$128.81
Ruland MBC25-12-12-A, 12mm x 12mm Bellows Coupling, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
Download CAD File:
MBC33-12-12-A
MBC33-12-12-A
As low as
$94.83
$139.09
Ruland MBC33-12-12-A, 12mm x 12mm Bellows Coupling, High Stiffness, Aluminum, 33.3mm, OD 43.2mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
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
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
BC21-5/8"-12MM-A
0.6250 in
12 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 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
BC26-3/4"-12MM-A
0.7500 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-5/8"-12MM-A
0.6250 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-1"-12MM-A
1.0000 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 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
BC32-3/4"-12MM-A
0.7500 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-5/8"-12MM-A
0.6250 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-7/8"-12MM-A
0.8750 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 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
BCK21-1/2"-12MM-A
0.5000 in
12 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BCK21-5/8"-12MM-A
0.6250 in
12 mm
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BCK26-1/2"-12MM-A
0.5000 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-3/4"-12MM-A
0.7500 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-5/8"-12MM-A
0.6250 in
12 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK32-1"-12MM-A
1.0000 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-1/2"-12MM-A
0.5000 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-3/4"-12MM-A
0.7500 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-5/8"-12MM-A
0.6250 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-7/8"-12MM-A
0.8750 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
MBC25-12-12-A
12 mm
12 mm
34.2 mm
Aluminum
25.4 mm
10,000 RPM
MBC33-12-12-A
12 mm
12 mm
43.2 mm
Aluminum
33.3 mm
10,000 RPM
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12 mm
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