RULAND MANUFACTURINGZero-Backlash Curved Jaw Coupling Hubs

RULAND MANUFACTURING Jaw Coupling Hub: MJS51 Coupling Size, 50.8 mm Outside Dia, Metric

The RULAND MANUFACTURING MJS51-20-A is a zero-backlash curved jaw coupling hub in the MJS51 coupling size, made of metric aluminum with a 50.8 mm outside diameter. This component is designed for motion control…

SKU 3G-OTH-134231

Also listed as: MJS5120A · MJS51 20 A

Brand

RULAND MANUFACTURING

Item

Jaw Coupling Hub: MJS51 Coupling Size, 50.8 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

MJS51-20-A 

Type

Metric, Aluminum 

Outside Dia

50.8 mm 

Technical Documents

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RULAND MANUFACTURING Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is a Ruland Manufacturing MJS51-20-A jaw coupling hub used for?

The Ruland Manufacturing MJS51-20-A is a zero-backlash curved jaw coupling hub used to connect two shafts in motion-control systems, such as servo motors and encoders. It accommodates misalignment while transmitting torque smoothly, making it ideal for precision automation, packaging, and robotics applications.

What are the specifications of the Ruland Manufacturing MJS51-20-A coupling hub?

The Ruland Manufacturing MJS51-20-A is a metric, aluminum jaw coupling hub with a 50.8 mm outside diameter and MJS51 coupling size. It is designed for zero-backlash curved jaw couplings, providing reliable torque transmission and misalignment accommodation in industrial machinery.

Where to buy a Ruland Manufacturing MJS51-20-A coupling hub worldwide?

You can source the Ruland Manufacturing MJS51-20-A coupling hub through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct Ruland component for your application.

How to select the correct Ruland Manufacturing jaw coupling hub size?

To select the correct Ruland Manufacturing jaw coupling hub, match the outside diameter (50.8 mm for MJS51) and bore size to your shaft dimensions. Ensure the hub material (aluminum) suits your torque and environmental needs. Ruland hubs are designed for zero-backlash curved jaw couplings, so verify compatibility with your existing coupling spider.

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.

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