MBCK33-12-11-A
$204.81
ea
Ruland MBCK33-12-11-A, 12mm x 11mm Bellows Coupling, Aluminum, Clamp Style With Keyway, 33.3mm OD, 42.9mm Length
PRODUCT SPECIFICATIONS
Ruland MBCK33-12-11-A is a bellows coupling with 12mm x 11mm bores, 33.3mm OD, 42.9mm length, and 4mm x 4mm keyways. It is zero-backlash and has a balanced design for reduced vibration at high speeds. MBCK33-12-11-A is comprised of two anodized aluminum hubs and a stainless steel bellows. The bellows are able to flex while remaining rigid under torsional loads allowing for all types of misalignment to be accommodated. This bellows coupling is lightweight and has low inertia making it suitable 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 MBCK33-12-11-A to be torsionally rigid and an excellent fit for precise positioning stepper servo applications as well as encoders. It is machined from solid bar stock that is sourced exclusively from North American mills and RoHS2 and REACH compliant. MBCK33-12-11-A is carefully manufactured in our Marlborough, MA factory under strict controls using proprietary processes.
PRODUCT SPECIFICATIONS
| Dimensions | |||
|---|---|---|---|
Large Bore B1 |
12 mm |
Small Bore B2 |
11 mm |
Keyway K1 |
4 mm |
Keyway K2 |
4 mm |
B1 Shaft Penetration |
20.4 mm |
B2 Shaft Penetration |
20.4 mm |
Outer Diameter OD |
33.3 mm |
Bore Tolerance |
+.03 mm / -.00 mm |
Length L |
42.9 mm |
Hub Width LH |
15.00 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 |
13.6 Nm |
Angular Misalignment |
1.5° |
Dynamic Torque Non-Reversing |
6.80 Nm |
Parallel Misalignment |
0.15 mm |
Dynamic Torque Reversing |
3.40 Nm |
Axial Motion |
0.40 mm |
Torsional Stiffness |
45 Nm/Deg |
Maximum Speed |
10,000 RPM |
| Additional Information | |||
Material Specification |
Hubs: 2024-T351 Aluminum Bar |
Temperature |
-40°F to 200°F |
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 |
63452916522 |
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| 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 metal bellows. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the metal bellows. Please consult technical support for more assistance. |
Prop 65 |
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WARNING This product can expose you to chemicals including Ethylene Thiourea and Nickel (metallic), known to the State of California to cause cancer, and Bisphenol A and Ethylene Thiourea, known to the State of California to cause birth defects or other reproductive harm. For more information go to 
