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This item is Discontinued.

Ruland Coupling, Bellows Set Screw, 1/2in.x1/2in. BS21-8-8-A

Coupling, Bellows Set Screw, 1/2in.x1/2in. (Discontinued)

  • Mfr # BS21-8-8-A
  • Zoro # G8258485
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Specifications

Product Information

MFR #
BS21-8-8-A
Zoro #
G8258485
UPC #
634529063323
Country of Origin
United States

Dimensions

Bore Dia.
1/2 in x 1/2 in
Outside Dia.
1.313 in
Overall Length
1.69 in
Clearance Dia. (In.)
1.313 in
Outside Dia. (In.)
1.313
Size
BS21
Clearance Dia. (mm)
33.3
Screw Size (mm)
M4
Overall Length (In.)
1.623
Outside Dia. (mm)
33.3
Length through Bore (In.)
0.811
Length through Bore (mm)
20.5
Length through Bore
0.811 in
Screw Size
M4
Overall Length (mm)
41.00
Clearance Diameter
1.31 in
Minimum Bore Diameter
1/2 in
Hub Length
0.59 in
Different Bore Sizes
No
Coupling Outside Diameter
1.31 in
Bore Diameter 1
1/2 in
Length Through Bore 2
0.8 in
Screw Thread Size
M4
Length Through Bore 1
0.8 in
Bore Diameter 2
1/2 in
Maximum Bore Diameter
1/2 in

Details

Item
Motion Control Coupling
Shaft Locking Type - Couplings
1 Piece Set Screw
System of Measurement
Inch
Material - Couplings
Aluminum
Finish
Black Anodized
Material
Aluminum
Max. Angular Misalignment
1.5 Degrees
Style
Bellows Set Screw
Max. Bore (In.)
0.5 in
Max. Temp.
200 Degrees F
Min. Bore (In.)
0.5 in
Max. Axial Misalignment (In.)
+/-0.016
Max. Parallel Misalignment (In.)
0.006 in
Max. Temp. Range (F)
200 Degrees
Max. RPM
10,000 RPM
Item - Motion Control Couplings
Motion Control Coupling
Screw Type
Set Screw
Torque (In.-Lbs.)
120
Rated Torque
120 in-lb
Torsional Stiffness (Deg./In.-Lbs.)
400
Application
Encoders, Stepper / Servo
Standards
Conflict Minerals Compliant, DIN 912 12.9 Screws, ISO 9001:2015, REACH Compliant, RoHS3 Compliant
Screw Material
Alloy Steel
Bore Tolerance
+0.001 in / -0.000 in
Parallel Misalignment
0.006 in
Fastener Tightening Torque
19.5 in-lb
Screw Material Finish
Black Oxide
Features
Balanced Design for Reduced Vibration, Lightweight and has Low Inertia, Zero Backlash
Hub Material Finish
Sulfuric Anodized MIL-A-8625 Type II; Class 2 and ASTM B580 Type B Black Anodize
Zero Backlash
Yes
Included Screws
(4) Set Screw
Shaft Locking Type
Set Screw
Torsional Stiffness
400 in-lb/Deg
Maximum Operating Temperature
200 Degrees F
Full Bearing Support Required
Yes
Bellows Material Finish
None
Maximum Torque
120 in-lb
Minimum Operating Temperature
-40 Degrees F
Bore Type
Round
Hub Material
Aluminum
Number of Locking Screws
4
Angular Misalignment
1.5 Degrees
For Misalignment Type
Angular, Axial, Parallel
Hub Material Grade
2024
Maximum Speed
10,000 RPM
Bellows Material
Stainless Steel
Axial Motion
0.016 in
Bellows Material Grade
MIL-A-8625 Type II; Class 2 and ASTM B580 Type B
Shaft Tolerance
+0.0000 in / -0.0005 in
Dynamic Torque Non-Reversing
60 lb-in
Dynamic Torque Reversing
30 lb-in

Description

Motion Control Coupling, Bore Diameter 1 1/2 in, Bore Diameter 2 1/2 in, Coupling Outside Diameter 1.31 in, Maximum Speed 10,000 RPM, Maximum Torque 120 in-lb, Hub Material Aluminum, Overall Length 1.69 in, Shaft Locking Type Set Screw, 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

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