Ruland DCD21-10-8-A Aluminum Disc Coupling, Double Disc Clamp Style, 0.625″ x 0.500″ Bores, 1.313″ OD

Ruland DCD21-10-8-A Aluminum Disc Coupling

Zero-backlash with anodized aluminum hubs for low inertia
Balanced design reduces vibration at speeds up to 10,000 RPM
Double disc style accommodates all forms of misalignment and is torsionally rigid making them well suited for precision positioning systems
Hardware exceeds DIN 912 12.9 standards for maximum torque capabilities
Ruland disc couplings are carefully made from select North American bar stock in our Marlborough, Massachusetts factory and are RoHS3 and REACH compliant

SKU: B016APOZL8 Categories: Couplings, Disc Tags: Disc Coupling, ruland

Description

Ruland DCD21-10-8-A Aluminum Disc Coupling

DIMENSIONS
Bore (B1)	0.6250 in	Small Bore (B2)	0.5000 in
B1 Min Shaft Penetration	0.354 in	B2 Min Shaft Penetration	0.354 in
B1 Max Shaft Penetration	0.590 in	B2 Max Shaft Penetration	0.842 in
Outer Diameter (OD)	1.313 in	Bore Tolerance	+0.001 in / -0.000 in
Length (L)	1.770 in	Hub Width (LH)	0.590 in
Recommended Shaft Tolerance	+0.0000 in / -0.0005 in
FASTENING HARDWARE
Forged Clamp Screw	M3	Screw Material	Alloy Steel
Hex Wrench Size	2.5 mm	Screw Finish	Black Oxide
Seating Torque	2.1 Nm	Number of Screws	2 ea
PERFORMANCE SPECIFICATIONS
Dynamic Torque Reversing	25 lb-in	Angular Misalignment	2.0°
Dynamic Torque Non-Reversing	50 lb-in	Parallel Misalignment	0.008 in
Static Torque	100 lb-in	Axial Motion	0.016 in
Torsional Stiffness	253 lb-in/Deg	Moment of Inertia	0.0436 lb-in²
Maximum Speed	10,000 RPM	Full Bearing Support Required?	Yes
Zero-Backlash?	Yes	Balanced Design	Yes
RECOMMENDED INSTALLATION TOOLS
Torque Wrench	TW:BT-1R-1/4-18.3	Recommended Hex Key	Metric Hex Keys
ADDITIONAL INFORMATION
Material Specification	Hubs and Center Spacer: 2024-T351 Aluminum Bar Disc Springs: Type 302 Stainless Steel	Temperature	-40°F to 200°F (-40°C to 93°C)
Finish Specification	Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize	Manufacturer	Ruland Manufacturing
Country of Origin	USA	Weight (lbs)	0.170600
UPC	634529081730	Tariff Code	8483.60.8000
UNSPC	31163008

Ruland disc couplings are zero-backlash, torsionally stiff, and have a balanced design. They are manufactured in single disc styles for compact installations and double disc styles for increased misalignment capabilities.

They are made from black anodized aluminum hubs and multiple flat stainless steel disc springs. Double disc styles also include a center spacer allowing the coupling to accommodate all forms of misalignment including parallel.

They are well suited for high precision positioning systems found in semiconductor, solar, printing, and machine tools.Combining aluminum hubs with stainless disc springs results in a lightweight, low inertia coupling that is well suited for precision applications found in a variety of industries including semiconductor, solar, printing, and machine tools.

Disc couplings are a simple assembly with few moving parts reducing the risk for coupling failure and backlash. Ruland uses a balanced design to reduce vibration in high RPM applications of up to 10,000 PRM. Ruland disc couplings are carefully made from select bar stock sourced exclusively from North American mills and are machined to a fine burr-free finish.

Hardware tests beyond DIN 912 12.9 standards for maximum torquing capabilities. Ruland, founded in 1937, manufactures all products in our Marlborough, MA USA factory under strict controls using proprietary processes. Disc couplings are RoHS2 and REACH compliant.