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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:
BC44-35MM-1 1/4\"-A
BC44-35MM-1 1/4"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-1 1/4"-A, 35mm x 1 1/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-35MM-1 1/8\"-A
BC44-35MM-1 1/8"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-1 1/8"-A, 35mm x 1 1/8" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-35MM-1 3/8\"-A
BC44-35MM-1 3/8"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-1 3/8"-A, 35mm x 1 3/8" 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:
BC44-35MM-3/4\"-A
BC44-35MM-3/4"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-3/4"-A, 35mm x 3/4" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC44-35MM-7/8\"-A
BC44-35MM-7/8"-A
As low as
$192.47
$282.28
Ruland BC44-35MM-7/8"-A, 35mm x 7/8" Bellows Coupling, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BC50-35MM-1 1/4\"-A
BC50-35MM-1 1/4"-A
As low as
$221.33
$324.62
Ruland BC50-35MM-1 1/4"-A, 35mm x 1 1/4" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-35MM-1 1/8\"-A
BC50-35MM-1 1/8"-A
As low as
$221.33
$324.62
Ruland BC50-35MM-1 1/8"-A, 35mm x 1 1/8" Bellows Coupling, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BC50-35MM-1 3/8\"-A
BC50-35MM-1 3/8"-A
As low as
$221.33
$324.62
Ruland BC50-35MM-1 3/8"-A, 35mm x 1 3/8" 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:
BCK44-35MM-1 1/4\"-A
BCK44-35MM-1 1/4"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-1 1/4"-A, 35mm x 1 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK44-35MM-1 1/8\"-A
BCK44-35MM-1 1/8"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-1 1/8"-A, 35mm x 1 1/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK44-35MM-1 3/8\"-A
BCK44-35MM-1 3/8"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-1 3/8"-A, 35mm x 1 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK44-35MM-1\"-A
BCK44-35MM-1"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-1"-A, 35mm x 1" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK44-35MM-3/4\"-A
BCK44-35MM-3/4"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-3/4"-A, 35mm x 3/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK44-35MM-7/8\"-A
BCK44-35MM-7/8"-A
As low as
$223.26
$327.45
Ruland BCK44-35MM-7/8"-A, 35mm x 7/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 2.750" (69.9 mm), OD 3.439" (87.4 mm) Length
Download CAD File:
BCK50-35MM-1 1/4\"-A
BCK50-35MM-1 1/4"-A
As low as
$256.75
$376.56
Ruland BCK50-35MM-1 1/4"-A, 35mm x 1 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BCK50-35MM-1 1/8\"-A
BCK50-35MM-1 1/8"-A
As low as
$256.75
$376.56
Ruland BCK50-35MM-1 1/8"-A, 35mm x 1 1/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BCK50-35MM-1 3/8\"-A
BCK50-35MM-1 3/8"-A
As low as
$256.75
$376.56
Ruland BCK50-35MM-1 3/8"-A, 35mm x 1 3/8" Bellows Coupling with Keyways, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Download CAD File:
BCK50-35MM-1\"-A
BCK50-35MM-1"-A
As low as
$256.75
$376.56
Ruland BCK50-35MM-1"-A, 35mm x 1" Bellows Coupling with Keyways, High Stiffness, Aluminum, 3.125" (79.4 mm), OD 3.816" (96.9 mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC44-35MM-1 1/4"-A
35 mm
1.2500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-35MM-1 1/8"-A
35 mm
1.1250 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-35MM-1 3/8"-A
35 mm
1.3750 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
BC44-35MM-3/4"-A
35 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC44-35MM-7/8"-A
35 mm
0.8750 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BC50-35MM-1 1/4"-A
35 mm
1.2500 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-35MM-1 1/8"-A
35 mm
1.1250 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BC50-35MM-1 3/8"-A
35 mm
1.3750 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
BCK44-35MM-1 1/4"-A
35 mm
1.2500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK44-35MM-1 1/8"-A
35 mm
1.1250 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK44-35MM-1 3/8"-A
35 mm
1.3750 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK44-35MM-1"-A
35 mm
1.0000 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK44-35MM-3/4"-A
35 mm
0.7500 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK44-35MM-7/8"-A
35 mm
0.8750 in
3.439 in (87.4 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
BCK50-35MM-1 1/4"-A
35 mm
1.2500 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BCK50-35MM-1 1/8"-A
35 mm
1.1250 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BCK50-35MM-1 3/8"-A
35 mm
1.3750 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
BCK50-35MM-1"-A
35 mm
1.0000 in
3.808 in (96.7 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
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