Ruland MDCD19-4-4-A 2024 or 7075 Aluminum Hubs Disc Coupling
Dimensions
| Bore Dia. | 4mm x 4mm |
| Outside Dia. | 19.1 mm |
| Overall Length | 30.2 mm |
| Length through Bore (mm) | 15.10 |
| Length through Bore | 15.1 mm |
| Outside Dia. (mm) | 19.10 |
| Overall Length (mm) | 30.2 |
| Hub Dia. | 19.1 mm |
| Screw Size (mm) | M2.5 |
| Screw Size | M2.5 |
| Clearance Dia. (mm) | 19.1 |
| Bore Diameter 2 | 4 mm |
| Length Through Bore 1 | 14.6 mm |
| Screw Thread Size | M2.5 |
| Minimum Bore Diameter | 4 mm |
| Length Through Bore 2 | 14.6 mm |
| Different Bore Sizes | No |
| Coupling Outside Diameter | 19.1 mm |
| Bore Diameter 1 | 4 mm |
| Maximum Bore Diameter | 4 mm |
| Hub Length | 10.6 mm |
Details
| Shaft Locking Type – Couplings | 1 Piece Clamp |
| Item | Motion Control Coupling |
| System of Measurement | Metric |
| Material – Couplings | Aluminum |
| Finish | Anodized Aluminum |
| Max. RPM | 10,000 RPM |
| Torsional Stiffness (Deg./In.-Lbs.) | 0.013 |
| Max. Parallel Misalignment (In.) | 0.004 in |
| Item – Motion Control Couplings | Motion Control Coupling |
| Max. Temp. | 200 Degrees F |
| Disc Type | Stainless Steel |
| Rated Torque | 25 in-lb |
| Style | Double Disc Clamp |
| Max. Angular Misalignment | 2 Degrees |
| Material | Aluminum |
| Torque (In.-Lbs.) | 25 |
| Max. Axial Misalignment (In.) | +/-0.008 |
| Screw Type | Cap Screw |
| Max. Temp. Range (F) | 200 |
| Application | Precise Positioning Stepper Servo |
| Standards | Conflict Minerals Compliant, DIN 912 12.9 Screws, REACH Compliant, RoHS Compliant |
| Screw Material | Alloy Steel |
| Bore Tolerance | +0.03 mm / -0.00 mm |
| For Misalignment Type | Angular, Axial, Parallel |
| Parallel Misalignment | 0.1 mm |
| Screw Material Finish | Black Oxide |
| Maximum Torque | 2.8 N-m |
| Shaft Locking Type | Clamp On |
| Torsional Stiffness | 5.8 N-m/Deg |
| Full Bearing Support Required | Yes |
| Hub Material Finish | Anodized Aluminum |
| Dynamic Torque Non-Reversing | 1.4 N-m |
| Disc Material | Stainless Steel |
| Dynamic Torque Reversing | 0.7 N-m |
| Minimum Operating Temperature | -23 Degrees C |
| For Environment | Angular Misalignment, Axial Motion, Parallel Misalignment |
| Maximum Operating Temperature | 93 Degrees C |
| Shaft Tolerance | +0.000/-0.013 mm |
| Included Screws | (2) Hex Socket Cap Screw |
| Features | Balanced Design for Reduced Vibration, Disc Spring Sets Bend Independent of Each Other, Lightweight and has Low Inertia |
| Hub Material | Aluminum |
| Angular Misalignment | 2 Degrees |
| Zero Backlash | Yes |
| Disc Material Grade | 302 |
| Number of Locking Screws | 2 |
| Number of Discs | 2 with Center Spacer |
| Fastener Tightening Torque | 1.21 N-m |
| Bore Type | Round |
| Maximum Speed | 10,000 RPM |
| Moment of Inertia | 0.000000964 kgf/m sq |
| Hub Material Grade | 2024 |
| Center Spacer Material | Aluminum |
| Axial Motion | 0.2 mm |
| Disc Material Finish | Black Anodized |
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 torqueing 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.
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