FCR20-8-8-SS

$242.77 ea
Quantity Price (USD)
1 $242.77 ea
10 $145.66 ea
25 $121.39 ea
50 $109.25 ea
100 Request Quote
In Production Lead Time: 0-2 Days
Ruland FCR20-8-8-SS, 1/2" x 1/2" Six Beam Coupling, Stainless Steel, Clamp Style, 1.250" OD, 1.750" Length

PRODUCT SPECIFICATIONS

Ruland FCR20-8-8-SS is a six beam coupling with 1/2" x 1/2" bores, 1.250" OD, and 1.750" length. It is machined from a single piece of material and features two sets of three spiral cuts. This gives it higher torque capacity, lower windup, and larger body sizes than single or four beam couplings and allows for use in light duty power transmission applications such as coupling a servo motor to a lead screw. FCR20-8-8-SS is zero-backlash and has a balanced design for reduced vibration at high speeds of up to 6,000 RPM. Ruland supplies this spiral coupling with Nypatch® anti-vibration hardware that allows for even seating of the screw, repeated screw installations, prevents galling, and maintains high holding power. All hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. FCR20-8-8-SS is made from 303 stainless steel for increased torque capacity. It is machined from bar stock that is sourced exclusively from North American mills and RoHS2 and REACH compliant. FCR20-8-8-SS is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.

PRODUCT SPECIFICATIONS

Dimensions

Large Bore B1

0.500 in

Small Bore B2

0.500 in

B1 Shaft Penetration

0.842 in

B2 Shaft Penetration

0.842 in

Outer Diameter OD

1.250 in

Bore Tolerance

+.001 in / -.000 in

Length L

1.750 in

Clearance Diameter C MAX

1.459 in

Fastening Hardware

Cap Screw

M5

Screw Material

Alloy Steel with Nypatch®

Hex Wrench Size

4.0 mm

Screw Finish

Black Oxide

Seating Torque

9.5 Nm

Number of Screws

2 ea

Performance Specifications

Static Torque

107 lb-in

Angular Misalignment

Dynamic Torque Non-Reversing

53.5 lb-in

Parallel Misalignment

0.015 in

Dynamic Torque Reversing

26.75 lb-in

Axial Motion

0.010 in

Torsional Stiffness

0.037 Deg/lb-in

Moment of Inertia

0.1094 lb-in2

Maximum Speed

6,000 RPM

Additional Information

Material Specification

Type 303 Austenitic, Non-Magnetic Bar

Temperature

-40°F to 350°F
-40°C to 176°C

Finish Specification

Bright

Manufacturer

Ruland Manufacturing

Country of Origin

USA

Weight (lbs.)

0.7530

UPC

63452904096

Product Notes

Note 1

Torque ratings are at maximum misalignment.

Note 2

Performance ratings are for guidance only. The user must determine suitability for a particular application.

Note 3

Torque ratings for the couplings are based on the physical limitations/failure point of the machined beams. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the machined beams. In some cases, especially when the smallest standard bores are used or where shafts are undersized, slippage on the shaft is possible below the rated torque of the machined beams. Please consult technical support for more assistance.

CERTIFICATIONS/STANDARDS
ISO 9001:2015

Certified

Conflict Minerals

Compliant

RoHS3

Compliant

REACH

Compliant

CUSTOMER REVIEWS

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