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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:
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:
BC16-11MM-3/8\"-A
BC16-11MM-3/8"-A
As low as
$87.82
$128.81
Ruland BC16-11MM-3/8"-A, 11mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-12MM-3/8\"-A
BC16-12MM-3/8"-A
As low as
$87.82
$128.81
Ruland BC16-12MM-3/8"-A, 12mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-6-6-A
BC16-6-6-A
As low as
$87.82
$128.81
Ruland BC16-6-6-A, 3/8" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Download CAD File:
BC16-8-6-A
BC16-8-6-A
As low as
$87.82
$128.81
Ruland BC16-8-6-A, 1/2" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.000", OD 1.345" Length
Download CAD File:
BC21-10-6-A
BC21-10-6-A
As low as
$94.83
$139.09
Ruland BC21-10-6-A, 5/8" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313", OD 1.700" 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:
BC21-11MM-3/8\"-A
BC21-11MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-11MM-3/8"-A, 11mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-12MM-3/8\"-A
BC21-12MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-12MM-3/8"-A, 12mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-13MM-3/8\"-A
BC21-13MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-13MM-3/8"-A, 13mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-14MM-3/8\"-A
BC21-14MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-14MM-3/8"-A, 14mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-15MM-3/8\"-A
BC21-15MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-15MM-3/8"-A, 15mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-16MM-3/8\"-A
BC21-16MM-3/8"-A
As low as
$94.83
$139.09
Ruland BC21-16MM-3/8"-A, 16mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
Download CAD File:
BC21-6-6-A
BC21-6-6-A
As low as
$94.83
$139.09
Ruland BC21-6-6-A, 3/8" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313", OD 1.700" Length
Download CAD File:
BC21-8-6-A
BC21-8-6-A
As low as
$94.83
$139.09
Ruland BC21-8-6-A, 1/2" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.313", OD 1.700" Length
Download CAD File:
BC26-10-6-A
BC26-10-6-A
As low as
$105.39
$154.57
Ruland BC26-10-6-A, 5/8" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625", OD 2.035" 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:
BC26-11MM-3/8\"-A
BC26-11MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-11MM-3/8"-A, 11mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-12-6-A
BC26-12-6-A
As low as
$105.39
$154.57
Ruland BC26-12-6-A, 3/4" x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625", OD 2.035" Length
Download CAD File:
BC26-12MM-3/8\"-A
BC26-12MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-12MM-3/8"-A, 12mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-13MM-3/8\"-A
BC26-13MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-13MM-3/8"-A, 13mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-14MM-3/8\"-A
BC26-14MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-14MM-3/8"-A, 14mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-15MM-3/8\"-A
BC26-15MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-15MM-3/8"-A, 15mm x 3/8" Bellows Coupling, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BC26-16MM-3/8\"-A
BC26-16MM-3/8"-A
As low as
$105.39
$154.57
Ruland BC26-16MM-3/8"-A, 16mm x 3/8" Bellows Coupling, 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-3/8"-A
10 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-11MM-3/8"-A
11 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-12MM-3/8"-A
12 mm
0.3750 in
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-6-6-A
0.3750 in
0.3750 in
1.345 in
Aluminum
1.000 in
10,000 RPM
BC16-8-6-A
0.5000 in
0.3750 in
1.345 in
Aluminum
1.000 in
10,000 RPM
BC21-10-6-A
0.6250 in
0.3750 in
1.700 in
Aluminum
1.313 in
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
BC21-11MM-3/8"-A
11 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-12MM-3/8"-A
12 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-13MM-3/8"-A
13 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-14MM-3/8"-A
14 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-15MM-3/8"-A
15 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-16MM-3/8"-A
16 mm
0.3750 in
1.700 in (43.2 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
BC21-6-6-A
0.3750 in
0.3750 in
1.700 in
Aluminum
1.313 in
10,000 RPM
BC21-8-6-A
0.5000 in
0.3750 in
1.700 in
Aluminum
1.313 in
10,000 RPM
BC26-10-6-A
0.6250 in
0.3750 in
2.035 in
Aluminum
1.625 in
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
BC26-11MM-3/8"-A
11 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-12-6-A
0.7500 in
0.3750 in
2.035 in
Aluminum
1.625 in
10,000 RPM
BC26-12MM-3/8"-A
12 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-13MM-3/8"-A
13 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-14MM-3/8"-A
14 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-15MM-3/8"-A
15 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BC26-16MM-3/8"-A
16 mm
0.3750 in
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
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Small Bore (B2)
0.3750 in
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