RULAND MANUFACTURINGZero-Backlash Curved Jaw Coupling Hubs

RULAND MANUFACTURING Jaw Coupling Hub: MJS57 Coupling Size, 57.2 mm Outside Dia, Metric

SKU 3G-OTH-134258

Also listed as: MJS5730A · MJS57 30 A

Brand

RULAND MANUFACTURING

Item

Jaw Coupling Hub: MJS57 Coupling Size, 57.2 mm Outside Dia, Metric

Local availability & support

Delivery: Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment: Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

RULAND MANUFACTURING

Manufacturer Part Number

MJS57-30-A 

Type

Metric, Aluminum 

Outside Dia

57.2 mm 

Technical Documents

No technical documents available for this product.

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RULAND MANUFACTURING Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The RULAND MANUFACTURING MJS57-30-A is a zero-backlash curved jaw coupling hub in the MJS57 coupling size, made of metric aluminum with a 57.2 mm outside diameter. 3G Electric interprets customer demand and delivers this genuine industrial component across 14 departments—and far more—with specialist depth in combustion, pumps, and controls as an authorized distributor for brands like FBR, Interpump, Riello, Beckett, Schneider, ABB, Siemens, SKF, Festo, and Fluke.

Frequently Asked Questions

What is a Ruland MJS57-30-A jaw coupling hub used for?

The Ruland MJS57-30-A is a zero-backlash curved jaw coupling hub used to connect two rotating shafts in motion-control systems. It accommodates misalignment while transmitting torque smoothly, making it ideal for servo motors, encoders, and precision industrial machinery.

What are the specifications of the Ruland MJS57-30-A coupling hub?

The Ruland MJS57-30-A is a metric aluminum jaw coupling hub with a 57.2 mm outside diameter. It is part of the MJS57 coupling size family and is designed for zero-backlash curved jaw applications. The manufacturer part number is MJS57-30-A.

Where to buy a Ruland MJS57-30-A coupling hub worldwide?

3G Electric supplies the Ruland MJS57-30-A jaw coupling hub to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this precision motion-control component.

How to select the correct Ruland jaw coupling hub for my application?

To select the correct Ruland jaw coupling hub, match the outside diameter (57.2 mm for MJS57 size) and bore dimensions to your shaft. Consider torque requirements, misalignment tolerance, and material—aluminum hubs are lightweight and corrosion-resistant. Consult Ruland's technical data for fit.

Used in

Common applications for RULAND MANUFACTURING

Automated packaging machinery — Ruland beam couplings (e.g., PSR20-8-5-A) for connecting servo motors to conveyor drive shafts.

CNC machine tools — Ruland rigid couplings (e.g., CLX-4-4-A) for precise alignment of ball screw assemblies.

Robotic arm joints — Ruland Oldham coupling hubs (e.g., OSC16-6-A) for accommodating axial motion in end-effector drives.

Pump and compressor systems — Ruland stainless steel shaft collars (e.g., CL-3-ST) for securing impeller shafts.

Printing press rollers — Ruland clamp-on beam couplings (e.g., PCR18-8-8-A) for synchronizing roller rotation with minimal backlash.

Material handling conveyors — Ruland set screw couplings (e.g., PSMR29-7-7-A) for linking gearboxes to drive rollers.

RULAND MANUFACTURING Products

3G Electric supplies RULAND MANUFACTURING zero-backlash curved jaw coupling hubs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

Browse all RULAND MANUFACTURING products →Contact our engineers →