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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:
BC12-1/4\"-4MM-A
BC12-1/4"-4MM-A
As low as
$79.05
$115.94
Ruland BC12-1/4"-4MM-A, 1/4" x 4mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-1/4\"-5MM-A
BC12-1/4"-5MM-A
As low as
$79.05
$115.94
Ruland BC12-1/4"-5MM-A, 1/4" x 5mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) 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:
BC12-3/16\"-4MM-A
BC12-3/16"-4MM-A
As low as
$79.05
$115.94
Ruland BC12-3/16"-4MM-A, 3/16" x 4mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-5/16\"-4MM-A
BC12-5/16"-4MM-A
As low as
$79.05
$115.94
Ruland BC12-5/16"-4MM-A, 5/16" x 4mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-5/16\"-5MM-A
BC12-5/16"-5MM-A
As low as
$79.05
$115.94
Ruland BC12-5/16"-5MM-A, 5/16" x 5mm 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:
BC12-5/16\"-7MM-A
BC12-5/16"-7MM-A
As low as
$79.05
$115.94
Ruland BC12-5/16"-7MM-A, 5/16" x 7mm Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-5MM-3/16\"-A
BC12-5MM-3/16"-A
As low as
$79.05
$115.94
Ruland BC12-5MM-3/16"-A, 5mm x 3/16" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-6MM-3/16\"-A
BC12-6MM-3/16"-A
As low as
$79.05
$115.94
Ruland BC12-6MM-3/16"-A, 6mm x 3/16" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-7MM-1/4\"-A
BC12-7MM-1/4"-A
As low as
$79.05
$115.94
Ruland BC12-7MM-1/4"-A, 7mm x 1/4" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-7MM-3/16\"-A
BC12-7MM-3/16"-A
As low as
$79.05
$115.94
Ruland BC12-7MM-3/16"-A, 7mm x 3/16" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-8MM-1/4\"-A
BC12-8MM-1/4"-A
As low as
$79.05
$115.94
Ruland BC12-8MM-1/4"-A, 8mm x 1/4" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-8MM-3/16\"-A
BC12-8MM-3/16"-A
As low as
$79.05
$115.94
Ruland BC12-8MM-3/16"-A, 8mm x 3/16" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC12-8MM-5/16\"-A
BC12-8MM-5/16"-A
As low as
$79.05
$115.94
Ruland BC12-8MM-5/16"-A, 8mm x 5/16" Bellows Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.303" (33.1mm) Length
Download CAD File:
BC32-1\"-12MM-A
BC32-1"-12MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-12MM-A, 1" x 12mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-13MM-A
BC32-1"-13MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-13MM-A, 1" x 13mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-14MM-A
BC32-1"-14MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-14MM-A, 1" x 14mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-15MM-A
BC32-1"-15MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-15MM-A, 1" x 15mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-16MM-A
BC32-1"-16MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-16MM-A, 1" x 16mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-17MM-A
BC32-1"-17MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-17MM-A, 1" x 17mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-18MM-A
BC32-1"-18MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-18MM-A, 1" x 18mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-19MM-A
BC32-1"-19MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-19MM-A, 1" x 19mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Download CAD File:
BC32-1\"-20MM-A
BC32-1"-20MM-A
As low as
$126.47
$185.49
Ruland BC32-1"-20MM-A, 1" x 20mm Bellows Coupling, High Stiffness, Aluminum, 2.000" (50.8mm), OD 2.413" (61.3mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
BC12-1/4"-4MM-A
0.2500 in
4 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-1/4"-5MM-A
0.2500 in
5 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 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
BC12-3/16"-4MM-A
0.1875 in
4 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-5/16"-4MM-A
0.3125 in
4 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-5/16"-5MM-A
0.3125 in
5 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
BC12-5/16"-7MM-A
0.3125 in
7 mm
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-5MM-3/16"-A
5 mm
0.1875 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-6MM-3/16"-A
6 mm
0.1875 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-7MM-1/4"-A
7 mm
0.2500 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-7MM-3/16"-A
7 mm
0.1875 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-8MM-1/4"-A
8 mm
0.2500 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-8MM-3/16"-A
8 mm
0.1875 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC12-8MM-5/16"-A
8 mm
0.3125 in
1.306 in (33.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
BC32-1"-12MM-A
1.0000 in
12 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-13MM-A
1.0000 in
13 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-14MM-A
1.0000 in
14 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-15MM-A
1.0000 in
15 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-16MM-A
1.0000 in
16 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-17MM-A
1.0000 in
17 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-18MM-A
1.0000 in
18 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-19MM-A
1.0000 in
19 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
BC32-1"-20MM-A
1.0000 in
20 mm
2.413 in (61.3 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
Filter
Now Shopping by
Length (L)
1.306 in (33.2 mm)
Length (L)
2.413 in (61.3 mm)
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