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

  • Mfr # BCK21-3/8"-9MM-A

  • Zoro # G3419780


product price:  $124.99
/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)
Max. Parallel Misalignment (In.)
0.006 in (0.15 mm)
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Specifications

Product Information

MFR #
BCK21-3/8"-9MM-A
Zoro #
G3419780
UPC #
634529291719
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
Max. Parallel Misalignment (In.)
0.006 in (0.15 mm)
Max. Angular Misalignment
1.5 deg
Material
Anodized Aluminum
Torsional Stiffness (Deg./In.-Lbs.)
400 lb-in/Deg (45 Nm/Deg)
Max. Temp. Range (F)
-40°F to 200°F (-40°C to 93°C)
Style
Clamp with Keyway
Weight
0.1559 lbs
B1 Shaft Penetration
0.804 in
Dynamic Torque Non-Reversing
60 lb-in (6.80 Nm)
Screw Finish
Black Oxide
Screw Seating Torque
2.1 Nm
Number of Screws
2 ea
Recommended Shaft Tolerance
+0.000 mm / -0.013 mm
Dynamic Torque Reversing
30 lb-in (3.40 Nm)
Measurement Type
Inch/Metric
Keyway (K1)
3/32 in
Screw Material
Alloy Steel
Axial Motion
0.016 in (0.40 mm)
B2 Shaft Penetration
20.4 mm
Bore Tolerance
+0.001 in / -0.000 in (+0.03 mm / -0.00 mm)
Static Torque
120 lb-in (13.6 Nm)
Keyway (K2)
3 mm

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 keyed clamp type bellows coupling consists of two anodized aluminum hubs and a stainless steel bellows creating a lightweight low inertia coupling. The addition of keyways allows for increased torque capacity and prevents the coupling from slipping on the shaft when over torqued. It has 0.375" x 9mm bores, 3/32" x 3mm keyways, 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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