Ruland DCD12-4-3-A Aluminum Disc Coupling, Double Disc Clamp Style, 0.250″ x 0.188″ Bores, 0.750″ OD

Name: Ruland DCD12-4-3-A Aluminum Disc Coupling, Double Disc Clamp Style, 0.250" x 0.188" Bores, 0.750" OD - Twin Spring Coupling - Universal joint, jaw coupling and elastomeric coupling replacements
SKU: B016APOZ1S
Price: 84.99 USD
Availability: InStock

Ruland DCD12-4-3-A Aluminum Disc Coupling

Ruland DCD12-4-3-A is a clamp double disc coupling with 0.2500″ x 0.1875″ bores, 0.750″ OD, and 1.189″ length.

It is zero-backlash and has a balanced design for reduced vibration at high speeds. The double disc design is comprised of two anodized aluminum hubs, two sets of thin stainless steel disc springs, and a center spacer allowing each disc to bend individually and accommodate all types of misalignment.

DCD12-4-3-A is lightweight and has low inertia making it well suited for applications with speeds up to 10,000 RPM. Hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities.

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Ruland manufactures DCD12-4-3-A to be torisionally rigid and an excellent fit for precise positioning stepper servo applications commonly found in semiconductor, solar, printing, machine tool, and test and measurement systems. It is machined from solid bar stock that is sourced exclusively from North American mills and RoHS3 and REACH compliant.

DCD12-4-3-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.

SKU: B016APOZ1S Categories: Couplings, Disc Tags: Disc Coupling, Industrial, ruland

Description

Ruland DCD12-4-3-A Aluminum Disc Coupling

DIMENSIONS
Bore (B1)	0.2500 in	Small Bore (B2)	0.1875 in
B1 Min Shaft Penetration	0.270 in	B2 Min Shaft Penetration	0.270 in
B1 Max Shaft Penetration	0.573 in	B2 Max Shaft Penetration	0.573 in
Outer Diameter (OD)	0.750 in	Bore Tolerance	+0.001 in / -0.000 in
Length (L)	1.189 in	Hub Width (LH)	0.418 in
Recommended Shaft Tolerance	+0.0000 in / -0.0005 in
FASTENING HARDWARE
Forged Clamp Screw	M2.5	Screw Material	Alloy Steel
Hex Wrench Size	2.0 mm	Screw Finish	Black Oxide
Seating Torque	1.21 Nm	Number of Screws	2 ea
PERFORMANCE SPECIFICATIONS
Dynamic Torque Reversing	6.25 lb-in	Angular Misalignment	2.0°
Dynamic Torque Non-Reversing	12.5 lb-in	Parallel Misalignment	0.004 in
Static Torque	25 lb-in	Axial Motion	0.008 in
Torsional Stiffness	51 lb-in/Deg	Moment of Inertia	0.0033 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-1/4-10.7	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)	0.042700
UPC	634529081556	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.