Keyed Clamp Bellows Cplg, Bores 0.375"x8mm, OD 1.313", L 1.688", Alum

  • Mfr # BCK21-3/8"-8MM-A

  • Zoro # G3414384


product price:  $124.99
/ea
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Key Features

Bore Dia.
0.375 in x 8 mm
Max. RPM
10000 RPM
Outside Dia.
1.313 in (33.3 mm)
Overall Length
1.688 in (42.9 mm)
Material
Anodized Aluminum
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Specifications

Product Information

MFR #
BCK21-3/8"-8MM-A
Zoro #
G3414384
UPC #
634529291702
Country of Origin
United States

Dimensions

Bore Dia.
0.375 in x 8 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
Material
Anodized Aluminum
Max. Temp. Range (F)
-40°F to 200°F (-40°C to 93°C)
Torsional Stiffness (Deg./In.-Lbs.)
400 lb-in/Deg (45 Nm/Deg)
Max. Angular Misalignment
1.5 deg
Style
Clamp with Keyway
Max. Parallel Misalignment (In.)
0.006 in (0.15 mm)
Weight
0.1573 lbs
Screw Finish
Black Oxide
Recommended Shaft Tolerance
+0.000 mm / -0.013 mm
Number of Screws
2 ea
B1 Shaft Penetration
0.804 in
Keyway (K2)
2 mm
Screw Material
Alloy Steel
Bore Tolerance
+0.001 in / -0.000 in (+0.03 mm / -0.00 mm)
Dynamic Torque Reversing
30 lb-in (3.40 Nm)
B2 Shaft Penetration
20.4 mm
Measurement Type
Inch/Metric
Axial Motion
0.016 in (0.40 mm)
Screw Seating Torque
2.1 Nm
Static Torque
120 lb-in (13.6 Nm)
Keyway (K1)
3/32 in
Dynamic Torque Non-Reversing
60 lb-in (6.80 Nm)

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 8mm bores, 3/32" x 2mm 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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