Zoro Homepage
Clipboard Icon Quick Order
Cart Icon 0 Cart
  1. Home
  2. /
  3. Power Transmission
  4. /
  5. Bearings, V-belts & Power Transmission Equipment
  6. /
  7. Couplings, Collars, & Adapters
  8. /
  9. Rigid Clamp Couplings
  10. /
  11. Coupling, Bellows Clamp, 5/16in.x 5/16in.
Ruland Coupling, Bellows Clamp, 5/16in.x 5/16in. BC21-5-5-A - main

Coupling, Bellows Clamp, 5/16in.x 5/16in.

  • Mfr # BC21-5-5-A

  • Zoro # G8217142

product price: $116.99
/ea
Free Shipping & Returns

Key Features

Shaft Locking Type - Couplings
1 Piece Clamp
System of Measurement
Inch
Material - Couplings
Aluminum
Outside Dia.
1.313 in
Overall Length
1.7 in
See all product information
Get a 10% off coupon
Free 30-day returns
Return Policy
Get 30 days to pay with Net 30
Apply Now
Unlock tax-exempt savings
Add Tax Exemption

Specifications

Product Information

MFR #
BC21-5-5-A
Zoro #
G8217142
UPC #
634529062753
Country of Origin
United States

Dimensions

Bore Dia.
5/16 in x 5/16 in
Outside Dia.
1.313 in
Overall Length
1.7 in
Outside Dia. (In.)
1.313
Length through Bore
0.811 in
Screw Size
M3
Clearance Dia. (mm)
33.3
Overall Length (mm)
41.00
Overall Length (In.)
1.623
Size
BC21
Clearance Dia. (In.)
1.313 in
Length through Bore (In.)
0.811
Length through Bore (mm)
20.5
Outside Dia. (mm)
33.3
Screw Size (mm)
M3
Length Through Bore 2
0.8 in
Bore Diameter 2
5/16 in
Coupling Outside Diameter
1.31 in
Maximum Bore Diameter
5/16 in
Different Bore Sizes
No
Minimum Bore Diameter
5/16 in
Clearance Diameter
1.31 in
Screw Thread Size
M3
Hub Length
0.59 in
Length Through Bore 1
0.8 in
Bore Diameter 1
5/16 in

Details

Shaft Locking Type - Couplings
1 Piece Clamp
Item
Motion Control Coupling
System of Measurement
Inch
Material - Couplings
Aluminum
Finish
Black Anodized
Rated Torque
120 in-lb
Max. Angular Misalignment
1.5 Degrees
Max. Axial Misalignment (In.)
+/-0.016
Item - Motion Control Couplings
Motion Control Coupling
Torque (In.-Lbs.)
120
Screw Type
Cap Screw
Max. Temp. Range (F)
200 Degrees
Style
Bellows Clamp
Max. Parallel Misalignment (In.)
0.006 in
Min. Bore (In.)
0.313 in
Max. Temp.
200 Degrees F
Max. Bore (In.)
0.313 in
Torsional Stiffness (Deg./In.-Lbs.)
400
Max. RPM
10,000 RPM
Material
Aluminum
Standards
Conflict Minerals Compliant, DIN 912 12.9 Screws, ISO 9001:2015, REACH Compliant, RoHS3 Compliant
Application
Encoders, Stepper / Servo
Bore Tolerance
+0.001 in / -0.000 in
Screw Material
Alloy Steel
Shaft Locking Type
Clamp On
Included Screws
(2) Hex Socket Cap Screw
Torsional Stiffness
400 in-lb/Deg
Zero Backlash
Yes
Bore Type
Round
Hub Material
Aluminum
Minimum Operating Temperature
-40 Degrees F
Bellows Material Finish
None
Shaft Tolerance
+0.0000 in / -0.0005 in
Parallel Misalignment
0.006 in
Full Bearing Support Required
Yes
Dynamic Torque Non-Reversing
60 lb-in
Bellows Material Grade
MIL-A-8625 Type II; Class 2 and ASTM B580 Type B
Screw Material Finish
Black Oxide
Bellows Material
Stainless Steel
Maximum Torque
120 in-lb
Hub Material Finish
Sulfuric Anodized MIL-A-8625 Type II; Class 2 and ASTM B580 Type B Black Anodize
Maximum Speed
10,000 RPM
Maximum Operating Temperature
200 Degrees F
Features
Balanced Design for Reduced Vibration, Lightweight and has Low Inertia, Zero Backlash
Moment of Inertia
0.03744 lb-in sq
Axial Motion
0.016 in
Angular Misalignment
1.5 Degrees
Hub Material Grade
2024
For Misalignment Type
Angular, Axial, Parallel
Fastener Tightening Torque
18.6 in-lb
Dynamic Torque Reversing
30 lb-in
Number of Locking Screws
2

Description

Motion Control Coupling, Bore Diameter 1 5/16 in, Bore Diameter 2 5/16 in, Coupling Outside Diameter 1.31 in, Maximum Speed 10,000 RPM, Maximum Torque 120 in-lb, Hub Material Aluminum, Overall Length 1.7 in, Shaft Locking Type Clamp On, System of Measurement Inch, Clearance Diameter 1.31 in, Bellows Material Stainless Steel, Different Bore Sizes No, Length Through Bore 1 0.8 in, Length Through Bore 2 0.8 in, Parallel Misalignment 0.006 in, Bore Type Round, Dynamic Torque Non-Reversing 60 lb-in

Restrictions

WARNING: Cancer and Reproductive Harm For more information go to www.P65Warnings.ca.gov

Ratings & Reviews

3 Reasons You Can Count On Us

  • Supplies for every job.

    Supplies for every job.

    10 million items and the exact one you need.

  • When you need it fast, count on Zoro!

    When you need it fast, count on Zoro!

    2 million products ship in 1 day.

  • Stretch your budget further.

    Stretch your budget further.

    Everyday low prices on the brands you love.

Explore More Products