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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:
BC10-1/4\"-6MM-A
BC10-1/4"-6MM-A
As low as
$84.30
$123.64
Ruland BC10-1/4"-6MM-A, 1/4" x 6mm Bellows Coupling, High Stiffness, Aluminum, 0.590" (15.0mm), OD 1.076" (27.3mm) Length
Download CAD File:
BC12-1/4\"-6MM-A
BC12-1/4"-6MM-A
As low as
$79.05
$115.94
Ruland BC12-1/4"-6MM-A, 1/4" x 6mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-5/16\"-6MM-A
BC12-5/16"-6MM-A
As low as
$79.05
$115.94
Ruland BC12-5/16"-6MM-A, 5/16" x 6mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC16-1/2\"-6MM-A
BC16-1/2"-6MM-A
As low as
$87.82
$128.81
Ruland BC16-1/2"-6MM-A, 1/2" x 6mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-1/4\"-6MM-A
BC16-1/4"-6MM-A
As low as
$87.82
$128.81
Ruland BC16-1/4"-6MM-A, 1/4" x 6mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-3/8\"-6MM-A
BC16-3/8"-6MM-A
As low as
$87.82
$128.81
Ruland BC16-3/8"-6MM-A, 3/8" x 6mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC16-5/16\"-6MM-A
BC16-5/16"-6MM-A
As low as
$87.82
$128.81
Ruland BC16-5/16"-6MM-A, 5/16" x 6mm Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Download CAD File:
BC36-28MM-1\"-A
BC36-28MM-1"-A
As low as
$172.38
$252.82
Ruland BC36-28MM-1"-A, 28mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-30MM-1\"-A
BC36-30MM-1"-A
As low as
$172.38
$252.82
Ruland BC36-30MM-1"-A, 30mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC36-32MM-1\"-A
BC36-32MM-1"-A
As low as
$172.38
$252.82
Ruland BC36-32MM-1"-A, 32mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.250" (57.2mm), OD 3.235" (82.2mm) Length
Download CAD File:
BC44-28MM-1\"-A
BC44-28MM-1"-A
As low as
$192.47
$282.28
Ruland BC44-28MM-1"-A, 28mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-30MM-1\"-A
BC44-30MM-1"-A
As low as
$192.47
$282.28
Ruland BC44-30MM-1"-A, 30mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-32MM-1\"-A
BC44-32MM-1"-A
As low as
$192.47
$282.28
Ruland BC44-32MM-1"-A, 32mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-35MM-1\"-A
BC44-35MM-1"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-1"-A, 35mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-38MM-1\"-A
BC44-38MM-1"-A
As low as
$192.47
$282.28
Ruland BC44-38MM-1"-A, 38mm x 1" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC50-28MM-1\"-A
BC50-28MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-28MM-1"-A, 28mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-30MM-1\"-A
BC50-30MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-30MM-1"-A, 30mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-32MM-1\"-A
BC50-32MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-32MM-1"-A, 32mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-35MM-1\"-A
BC50-35MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-35MM-1"-A, 35mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-38MM-1\"-A
BC50-38MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-38MM-1"-A, 38mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-40MM-1\"-A
BC50-40MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-40MM-1"-A, 40mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-42MM-1\"-A
BC50-42MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-42MM-1"-A, 42mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-45MM-1\"-A
BC50-45MM-1"-A
As low as
$221.33
$324.62
Ruland BC50-45MM-1"-A, 45mm x 1" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BCK16-1/2\"-6MM-A
BCK16-1/2"-6MM-A
As low as
$104.27
$152.92
Ruland BCK16-1/2"-6MM-A, 1/2" x 6mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC10-1/4"-6MM-A
0.2500 in
6 mm
1.076 in (27.3 mm)
Aluminum
0.590 in (15.0 mm)
10,000 RPM
BC12-1/4"-6MM-A
0.2500 in
6 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-5/16"-6MM-A
0.3125 in
6 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC16-1/2"-6MM-A
0.5000 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-1/4"-6MM-A
0.2500 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-3/8"-6MM-A
0.3750 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC16-5/16"-6MM-A
0.3125 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
BC36-28MM-1"-A
28 mm
1.0000 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-30MM-1"-A
30 mm
1.0000 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC36-32MM-1"-A
32 mm
1.0000 in
3.235 in (82.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
BC44-28MM-1"-A
28 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-30MM-1"-A
30 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-32MM-1"-A
32 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-35MM-1"-A
35 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-38MM-1"-A
38 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC50-28MM-1"-A
28 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-30MM-1"-A
30 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-32MM-1"-A
32 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-35MM-1"-A
35 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-38MM-1"-A
38 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-40MM-1"-A
40 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-42MM-1"-A
42 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-45MM-1"-A
45 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BCK16-1/2"-6MM-A
0.5000 in
6 mm
1.345 in (34.2 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
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Small Bore (B2)
1.0000 in
Small Bore (B2)
6 mm
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