Ruland BS21-10-10-A Ruland bellows couplings are zero-backlash, torsionally stiff, and have a balanced design. They are made from black anodized aluminum hubs and stainless steel bellows to offer superior performance in precision servo applications. The stainless steel bellows are ideal for transmitting torque due to their thin walls allowing the coupling to easily flex while [...]
Couplings
Ruland DCD12-4-3-A Aluminum Disc Coupling, Double Disc Clamp Style, 0.250″ x 0.188″ Bores, 0.750″ OD
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. I have to add 6 more words to make 600?? 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.
Ruland DCD16-5-5-A Aluminum Disc Coupling
Ruland DCD16-5-5-A is a clamp double disc coupling with 0.3125" x 0.3125" bores, 1.000" OD, and 1.374" 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. DCD16-5-5-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 DCD16-5-5-A to be torsionally 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. DCD16-5-5-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.
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
Ruland MBC33-15-15-A 2024 or 7075 Aluminum Hubs Bellows Coupling
- Bellows coupling have zero-backlash with high torsional stiffness for high accuracy and repeatability
- Manufactured from high strength 2024 aluminum with a balanced design for reduced vibration at speeds up to 10,000 RPM
- Thin walls of the bellows allow the coupling to flex easily while remaining rigid under torsional loads
- Manufactured from 7075 aluminum for light weight and low inertia.
- Hardware exceeds DIN 912 12.9 standards for maximum torque capabilities. Ruland beam couplings are carefully made from select North American bar stock in our Marlborough, Massachusetts factory and are RoHS3 and REACH compliant.
Ruland MBC51-20-12-A 2024 or 7075 Aluminum Hubs Bellows Coupling, Clamp Style, 20 mm x 12 mm Bores, 50.8 mm OD, 58.7 mm Length
| DIMENSIONS | |||
|---|---|---|---|
| Bore (B1) | 20 mm | Small Bore (B2) | 12 mm |
| B1 Max Shaft Penetration | 27.9 mm | B2 Max Shaft Penetration | 27.9 mm |
| Outer Diameter (OD) | 50.8 mm | Bore Tolerance | +0.03 mm / -0.00 mm |
| Length (L) | 61.3 mm | Length Tolerance | +/- 0.76 mm |
| Hub Width (LH) | 20.55 mm | Recommended Shaft Tolerance | +0.000 mm / -0.013 mm |
| FASTENING HARDWARE | |||
| Forged Clamp Screw | M5 | Screw Material | Alloy Steel |
| Hex Wrench Size | 4.0 mm | Screw Finish | Black Oxide |
| Seating Torque | 9.5 Nm | Number of Screws | 2 ea |
| PEFORMANCE SPECIFICATIONS | |||
| Dynamic Torque Reversing | 11.30 Nm | Angular Misalignment | 2.0° |
| Dynamic Torque Non-Reversing | 22.60 Nm | Parallel Misalignment | 0.25 mm |
| Static Torque | 45.2 Nm | Axial Motion | 0.50 mm |
| Torsional Stiffness | 108 Nm/Deg | Moment of Inertia | 81.191 x10-6 kg-m2 |
| Maximum Speed | 10,000 RPM | Full Bearing Support Required? | Yes |
| Zero-Backlash? | Yes | Balanced Design | Yes |
| RECOMMENDED INSTALLATION TOOLS | |||
| Torque Wrench | TW:BT-4C-3/8-86 | Recommended Hex Key | Metric Hex Keys |
| ADDITIONAL INFORMATION | |||
| Material Specification | Hubs: 2024-T351 Aluminum Bar Bellows: Type 321 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 | Bellows Attachment Method | Epoxy |
| Manufacturer | Ruland Manufacturing | Country of Origin | USA |
| Weight (lbs) | 0.476500 | UPC | 634529064351 |
| Tariff Code | 8483.60.8000 | UNSPC | 31163018 |
Ruland MBC51-20-14-A 2024 or 7075 Aluminum Hubs Bellows Coupling, Clamp Style, 20 mm x 14 mm Bores, 50.8 mm OD, 58.7 mm Length
Ruland MBC51-24-20-A 2024 or 7075 Aluminum Hubs Bellows Coupling, Clamp Style, 24 mm x 20 mm Bores, 50.8 mm OD, 58.7 mm Length
- Bellows coupling have zero-backlash with high torsional stiffness for high accuracy and repeatability
- Manufactured from high strength 2024 aluminum with a balanced design for reduced vibration at speeds up to 10,000 RPM
- Thin walls of the bellows allow the coupling to flex easily while remaining rigid under torsional loads
- Manufactured from 7075 aluminum for light weight and low inertia.
- Hardware exceeds DIN 912 12.9 standards for maximum torque capabilities. Ruland beam couplings are carefully made from select North American bar stock in our Marlborough, Massachusetts factory and are RoHS3 and REACH compliant.
Ruland MDCD19-4-4-A 2024 or 7075 Aluminum Hubs Disc Coupling
Description
Motion Control Coupling,
Angular Misalignment 2 Degrees ,
Axial Motion 0.2 mm,
Bore Diameter 1 4 mm,
Bore Diameter 2 4 mm,
Bore Type Round,
Dynamic Torque Non-Reversing 1.4 N-m,
Hub Length 10.6 mm,
Hub Material Aluminum,
Dynamic Torque Reversing 0.7 N-m,
Coupling Outside Diameter 19.1 mm,
Number of Discs 2 with Center Spacer,
Center Spacer Material Aluminum,
Length Through Bore 1 14.6 mm,
Length Through Bore 2 14.6 mm,
Maximum Bore Diameter 4 mm,
Minimum Bore Diameter 4 mm
Ruland MDCD19-8-5-A 2024 or 7075 Aluminum Hubs Disc Coupling
Ruland MDCD19-8-5-A is a clamp double disc coupling with 8mm x 5mm bores, 19.1mm OD, and 30.2mm 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. MDCD19-8-5-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 MDCD19-8-5-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. MDCD19-8-5-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.
Ruland MDCD25-10-10-A 2024 or 7075 Aluminum Hubs Disc Coupling
Ruland MDCD25-10-10-A is a clamp double disc coupling with 10mm x 10mm bores, 25.4mm OD, and 34.9mm 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. MDCD25-10-10-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 MDCD25-10-10-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. MDCD25-10-10-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.- 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
Ruland MDCD25-12-8-A 2024 or 7075 Aluminum Hubs Disc Coupling
Description
Motion Control Coupling, Angular Misalignment 2 Degrees , Axial Motion 0.3 mm,
Bore Diameter 1 12 mm, Bore Diameter 2 8 mm, Bore Type Round, Dynamic Torque Non-Reversing 2.8 N-m,
Hub Length 11.8 mm, Hub Material Aluminum, Dynamic Torque Reversing 1.4 N-m,
Coupling Outside Diameter 25.4 mm, Number of Discs 2 with Center Spacer, Center Spacer Material Aluminum,
Length Through Bore 1 11.8 mm, Length Through Bore 2 16.6 mm, Maximum Bore Diameter 12 mm, Minimum Bore Diameter 12 mm
- 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