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Product Specifications:
| Item | Jaw Coupling Hub |
| B1 Max Shaft Penetration | 20.8 mm |
| Balanced Design | Yes |
| Bore (b1) | 15 mm |
| Bore Tolerance | -0 mm to +0.03 mm |
| Fail Safe | Yes |
| Finish | Bright |
| Finish Specification | Bright, No Plating |
| Forged Set Screw | M6 |
| Full Bearing Support Required | Yes |
| Hex Wrench Size | 3 mm |
| Hub Width (lh) | 20.83 mm |
| Length (l) | 2.4" |
| Material Specification | 2024-T351 Aluminum Bar |
| Max. Speed | 8000 RPM |
| Misalignment | Misalignment Ratings Vary With Insert Selection |
| Moment Of Inertia | 4.502 x 10 |
| Number Of Screws | 2 EA 90° Apart |
| Outer Diameter | 2" |
| Recommended Gap Between Hubs | 0.05" |
| Recommended Inserts | JD32/51-98R |
| Recommended Shaft Tolerance | -0.013 mm to 0 mm |
| Screw Finish | Black Oxide |
| Screw Material | Alloy Steel |
| Seating Torque | 7.2 N-m |
| Temperature | -10°F to 180°F |
| Torque Specifications | Torque Ratings Vary With Insert Selection |
| Zero-backlash | Yes |
Shipping Info:
| Ship weight (kg) | 0.12 |
| Ship height (cm) | 5.08 |
| Ship length (cm) | 6.1 |
| Ship width (cm) | 5.08 |
| Country of Origin | US |
Product Variants
| Model | Outside Dia. | Coupling Size | Bore Dia. | Bore Tolerance | Size | Overall Length | Length Through Bore | Hub Projection | Price | |
|---|---|---|---|---|---|---|---|---|---|---|
| MJS15-3-A | 15 mm | MJS15 | 3 mm | 0 mm to 0.05 mm | MJS15 | 7.6 mm | 7.6 mm | 7.6 mm | €36.59 | |
| MJS15-4-A | 15 mm | MJS15 | 4 mm | 0 mm to 0.05 mm | MJS15 | 7.6 mm | 7.6 mm | 7.6 mm | €36.59 | |
| MJS15-5-A | 15 mm | MJS15 | 5 mm | 0 mm to 0.05 mm | MJS15 | 7.6 mm | 7.6 mm | 7.6 mm | €36.59 | |
| MJS15-6-A | 15 mm | MJS15 | 6 mm | 0 mm to 0.05 mm | MJS15 | 7.6 mm | 7.6 mm | 7.6 mm | €36.59 | |
| MJS19-4-A | 19.1 mm | MJS19 | 4 mm | 0 mm to 0.05 mm | MJS19 | 9.8 mm | 9.8 mm | 9.8 mm | €41.02 | |
| MJS19-5-A | 19.1 mm | MJS19 | 5 mm | 0 mm to 0.05 mm | MJS19 | 9.8 mm | 9.8 mm | 9.8 mm | €41.02 | |
| MJS19-6-A | 19.1 mm | MJS19 | 6 mm | 0 mm to 0.05 mm | MJS19 | 9.8 mm | 9.8 mm | 9.8 mm | €39.97 |
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Contact us
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RULAND MANUFACTURING MJS51-15-A 15mm Jaw Coupling Hub, Aluminum, Set Screw Style, 50.8mm OD, 20.8mm Lg.
€138.37 /unit

