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Bellows Couplings for Printing Applications
Ruland bellows couplings are made of two lightweight anodized aluminum hubs joined by a flexible stainless steel bellows creating a low inertia, zero-backlash coupling. The thin walls of the bellows allow the coupling to flex under misalignment while remaining rigid under torsional loads. Engineers designing large format printing 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. Their high torsional stiffness and balanced design is critical in large format printers to prevent banding. Ruland manufactures bellows couplings with balanced design for reduced vibration at speeds up to 10,000 RPM. 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. Ruland bellows couplings are manufactured in our Marlborough, MA factory under strict controls using proprietary processes.
Products
Download CAD File:
BC16-10MM-1/4\"-A
BC16-10MM-1/4"-A
As low as
$87.82
$128.81
Ruland BC16-10MM-1/4"-A, 10mm x 1/4" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-10MM-3/8\"-A
BC16-10MM-3/8"-A
As low as
$87.82
$128.81
Ruland BC16-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-10MM-5/16\"-A
BC16-10MM-5/16"-A
As low as
$87.82
$128.81
Ruland BC16-10MM-5/16"-A, 10mm x 5/16" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC21-10MM-3/8\"-A
BC21-10MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-10MM-5/16\"-A
BC21-10MM-5/16"-A
As low as
$94.83
$139.09
Ruland BC21-10MM-5/16"-A, 10mm x 5/16" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC26-10MM-3/8\"-A
BC26-10MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-20MM-1/2\"-A
BC26-20MM-1/2"-A
As low as
$105.39
$154.57
Ruland BC26-20MM-1/2"-A, 20mm x 1/2" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
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:
BC26-20MM-3/8\"-A
BC26-20MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-20MM-3/8"-A, 20mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-20MM-5/8\"-A
BC26-20MM-5/8"-A
As low as
$105.39
$154.57
Ruland BC26-20MM-5/8"-A, 20mm x 5/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC32-20MM-1/2\"-A
BC32-20MM-1/2"-A
As low as
$126.47
$185.49
Ruland BC32-20MM-1/2"-A, 20mm x 1/2" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) 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:
BC32-20MM-5/8\"-A
BC32-20MM-5/8"-A
As low as
$126.47
$185.49
Ruland BC32-20MM-5/8"-A, 20mm x 5/8" Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC36-20MM-1/2\"-A
BC36-20MM-1/2"-A
As low as
$172.38
$252.82
Ruland BC36-20MM-1/2"-A, 20mm x 1/2" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) 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:
BC36-20MM-5/8\"-A
BC36-20MM-5/8"-A
As low as
$172.38
$252.82
Ruland BC36-20MM-5/8"-A, 20mm x 5/8" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK16-10MM-1/4\"-A
BCK16-10MM-1/4"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-1/4"-A, 10mm x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-10MM-3/8\"-A
BCK16-10MM-3/8"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK16-10MM-5/16\"-A
BCK16-10MM-5/16"-A
As low as
$104.27
$152.92
Ruland BCK16-10MM-5/16"-A, 10mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BCK21-10MM-3/8\"-A
BCK21-10MM-3/8"-A
As low as
$113.14
$165.94
Ruland BCK21-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BCK21-10MM-5/16\"-A
BCK21-10MM-5/16"-A
As low as
$113.14
$165.94
Ruland BCK21-10MM-5/16"-A, 10mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BCK26-10MM-3/8\"-A
BCK26-10MM-3/8"-A
As low as
$135.16
$198.24
Ruland BCK26-10MM-3/8"-A, 10mm x 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-20MM-1/2\"-A
BCK26-20MM-1/2"-A
As low as
$135.16
$198.24
Ruland BCK26-20MM-1/2"-A, 20mm x 1/2" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) 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
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC16-10MM-1/4"-A
10 mm
0.2500 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-10MM-3/8"-A
10 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-10MM-5/16"-A
10 mm
0.3125 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC21-10MM-3/8"-A
10 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-10MM-5/16"-A
10 mm
0.3125 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC26-10MM-3/8"-A
10 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-20MM-1/2"-A
20 mm
0.5000 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
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
BC26-20MM-3/8"-A
20 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-20MM-5/8"-A
20 mm
0.6250 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC32-20MM-1/2"-A
20 mm
0.5000 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 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
BC32-20MM-5/8"-A
20 mm
0.6250 in
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC36-20MM-1/2"-A
20 mm
0.5000 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 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
BC36-20MM-5/8"-A
20 mm
0.6250 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK16-10MM-1/4"-A
10 mm
0.2500 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-10MM-3/8"-A
10 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK16-10MM-5/16"-A
10 mm
0.3125 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BCK21-10MM-3/8"-A
10 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BCK21-10MM-5/16"-A
10 mm
0.3125 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BCK26-10MM-3/8"-A
10 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-20MM-1/2"-A
20 mm
0.5000 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 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
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