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Bellows Coupling: Inch to Metric
Bellows couplings with inch to metric bore combinations are available with clamp style hubs with or without keyways in bore dimensions ranging from 1/8" (3mm) to 1-3/4" (45mm). Stainless steel hubs and other custom features are available by special order.
Features High torque with low inertia
Balanced design for high RPM
Long Life with no maintenance
High torsional stiffness
Constant velocity
Zero backlash
RoHS3 and REACH Compliant
Maximum speed: 10,000 RPM
Bore tolerance:
+.001 in / -.000 in
+.03mm/–.000mm
Temperature Range: -40°F to 200°F
Material
Aluminum hubs are standard
Stainless steel hubs available upon request
How to Specify Part numbers are in the following format with numbers representing sixteenths of an inch or millimeters:
Products
Download CAD File:
BCK26-3/4\"-10MM-A
BCK26-3/4"-10MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-10MM-A, 3/4" x 10mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-3/4\"-11MM-A
BCK26-3/4"-11MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-11MM-A, 3/4" x 11mm 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:
BCK26-3/4\"-13MM-A
BCK26-3/4"-13MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-13MM-A, 3/4" x 13mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-3/4\"-14MM-A
BCK26-3/4"-14MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-14MM-A, 3/4" x 14mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) 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:
BCK26-3/4\"-16MM-A
BCK26-3/4"-16MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-16MM-A, 3/4" x 16mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) Length
Download CAD File:
BCK26-3/4\"-17MM-A
BCK26-3/4"-17MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-17MM-A, 3/4" x 17mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) 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:
BCK26-3/4\"-19MM-A
BCK26-3/4"-19MM-A
As low as
$135.16
$198.24
Ruland BCK26-3/4"-19MM-A, 3/4" x 19mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.625" (41.3mm), OD 2.035" (51.7mm) 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:
BCK32-3/4\"-13MM-A
BCK32-3/4"-13MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-13MM-A, 3/4" x 13mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-3/4\"-14MM-A
BCK32-3/4"-14MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-14MM-A, 3/4" x 14mm 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:
BCK32-3/4\"-16MM-A
BCK32-3/4"-16MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-16MM-A, 3/4" x 16mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK32-3/4\"-17MM-A
BCK32-3/4"-17MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-17MM-A, 3/4" x 17mm 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:
BCK32-3/4\"-19MM-A
BCK32-3/4"-19MM-A
As low as
$162.57
$238.43
Ruland BCK32-3/4"-19MM-A, 3/4" x 19mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BCK36-3/4\"-14MM-A
BCK36-3/4"-14MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-14MM-A, 3/4" x 14mm 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
Download CAD File:
BCK36-3/4\"-16MM-A
BCK36-3/4"-16MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-16MM-A, 3/4" x 16mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BCK36-3/4\"-17MM-A
BCK36-3/4"-17MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-17MM-A, 3/4" x 17mm 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:
BCK36-3/4\"-19MM-A
BCK36-3/4"-19MM-A
As low as
$199.99
$293.32
Ruland BCK36-3/4"-19MM-A, 3/4" x 19mm 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
BCK26-3/4"-10MM-A
0.7500 in
10 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-3/4"-11MM-A
0.7500 in
11 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
BCK26-3/4"-13MM-A
0.7500 in
13 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-3/4"-14MM-A
0.7500 in
14 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 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
BCK26-3/4"-16MM-A
0.7500 in
16 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
BCK26-3/4"-17MM-A
0.7500 in
17 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 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
BCK26-3/4"-19MM-A
0.7500 in
19 mm
2.035 in (51.7 mm)
Aluminum
1.625 in (41.3 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
BCK32-3/4"-13MM-A
0.7500 in
13 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-3/4"-14MM-A
0.7500 in
14 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
BCK32-3/4"-16MM-A
0.7500 in
16 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK32-3/4"-17MM-A
0.7500 in
17 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
BCK32-3/4"-19MM-A
0.7500 in
19 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BCK36-3/4"-14MM-A
0.7500 in
14 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
BCK36-3/4"-16MM-A
0.7500 in
16 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BCK36-3/4"-17MM-A
0.7500 in
17 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
BCK36-3/4"-19MM-A
0.7500 in
19 mm
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
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Bore (B1)
0.7500 in
Keyway
Yes
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