MDCDK33-12-8-A

$156.61 ea
Quantity Price (USD)
1 $156.61 ea
10 $93.97 ea
25 $78.31 ea
50 $70.47 ea
100 Request Quote
Built to Order Lead Time: 0-2 Days
Ruland MDCDK33-12-8-A, 12mm x 8mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 33.3mm OD, 45.0mm Length

PRODUCT SPECIFICATIONS

Ruland MDCDK33-12-8-A is a double disc coupling with 12mm x 8mm bores, 33.3mm OD, 45.0mm length, and 4mm x 2mm keyways. 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. MDCDK33-12-8-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. Ruland manufactures MDCDK33-12-8-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 RoHS2 and REACH compliant. MDCDK33-12-8-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.

PRODUCT SPECIFICATIONS

Dimensions

Large Bore B1

12 mm

Small Bore B2

8 mm

Keyway K

4 mm

Keyway K2

2 mm

B1 Shaft Penetration

21.4 mm

B2 Shaft Penetration

21.4 mm

Outer Diameter OD

33.3 mm

Bore Tolerance

+.03 mm / -.00 mm

Length L

45.0 mm

Hub Width LH

15.0 mm

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

Static Torque

11.3 Nm

Angular Misalignment

2.0°

Dynamic Torque Non-Reversing

5.65 Nm

Parallel Misalignment

0.20 mm

Dynamic Torque Reversing

2.83 Nm

Axial Motion

0.40 mm

Torsional Stiffness

28.6 Nm/Deg

Maximum Speed

10,000 RPM

Additional Information

Material Specification

Hubs and Center Spacer: 2024-T351 Aluminum Bar
Disc Springs: Type 302 Stainless Steel

Temperature

-10°F to 200°F
-23°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.)

0.1650

UPC

63452917442

Product Notes

Note 1

Stainless steel hubs are available upon request.

Note 2

Torque ratings are at maximum misalignment.

Note 3

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

Note 4

Torque ratings for the couplings are based on the physical limitations/failure point of the disc springs. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the disc springs. 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 disc springs. Keyways are available to provide additional torque capacity in the shaft/hub connection when required. 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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