Clamp Bellows Cplg, Bores 0.375"x9mm, OD 1.313", L 1.688", Aluminum

  • Mfr # BC21-3/8"-9MM-A

  • Zoro # G3409037


product price:  $96.85
/ea
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Key Features

Bore Dia.
0.375 in x 9 mm
Max. RPM
10000 RPM
Outside Dia.
1.313 in (33.3 mm)
Overall Length
1.688 in (42.9 mm)
Torsional Stiffness (Deg./In.-Lbs.)
400 lb-in/Deg (45 Nm/Deg)
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Specifications

Product Information

MFR #
BC21-3/8"-9MM-A
Zoro #
G3409037
UPC #
634529233191
Country of Origin
United States

Dimensions

Bore Dia.
0.375 in x 9 mm
Outside Dia.
1.313 in (33.3 mm)
Overall Length
1.688 in (42.9 mm)
Screw Size
M3
Length
1.688 in (42.9 mm)
Fastening Dimensions
Metric

Details

Max. RPM
10000 RPM
Torsional Stiffness (Deg./In.-Lbs.)
400 lb-in/Deg (45 Nm/Deg)
Style
Clamp
Max. Parallel Misalignment (In.)
0.006 in (0.15 mm)
Material
Anodized Aluminum
Max. Angular Misalignment
1.5 deg
Max. Temp. Range (F)
-40°F to 200°F (-40°C to 93°C)
Weight
0.156 lbs
Screw Finish
Black Oxide
Recommended Shaft Tolerance
+0.000 mm / -0.013 mm
Bore Tolerance
+0.001 in / -0.000 in (+0.03 mm / -0.00 mm)
Measurement Type
Inch/Metric
Static Torque
120 lb-in (13.6 Nm)
Axial Motion
0.016 in (0.40 mm)
Number of Screws
2 ea
B2 Shaft Penetration
20.4 mm
Dynamic Torque Reversing
30 lb-in (3.40 Nm)
Dynamic Torque Non-Reversing
60 lb-in (6.80 Nm)
Screw Seating Torque
2.1 Nm
B1 Shaft Penetration
0.804 in
Screw Material
Alloy Steel

Description

Ruland standard length bellows couplings are a high torque zero-backlash coupling commonly found in responsive systems on semiconductor, solar, test and measurement, and printing equipment. This clamp type bellows coupling consists of two anodized aluminum hubs and a stainless steel bellows creating a lightweight low inertia coupling. It has 0.375" x 9mm bores, 1.313" (33.3mm) OD, and 1.688" (42.9mm) length. This coupling has a four convolution bellows for higher torque and torsional stiffness capabilities than equivalent couplings with more convolutions. The bellows are able to flex while remaining rigid under torsional loads allowing for all types of misalignment to be accommodated. This bellows coupling has a balanced design for reduced vibration at high speeds of up to 10,000 RPM. Hardware is metric and tests beyond DIN 912 12.9 standards. It is RoHS and REACH compliant.

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