RULAND MANUFACTURINGZero-Backlash Curved Jaw Coupling Hubs

RULAND MANUFACTURING Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch

The RULAND MANUFACTURING JS21-5-A is a zero-backlash curved jaw coupling hub in the JS21 coupling size, made of inch-dimension aluminum with a 1 5/16 in outside diameter. This component is designed for motion control…

SKU 3G-OTH-134284

Brand

RULAND MANUFACTURING

Item

Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch

Technical Specifications

RULAND MANUFACTURING

Manufacturer Part Number

JS21-5-A 

Type

Inch, Aluminum 

Outside Dia

1 5/16 in 

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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 JS21-5-A jaw coupling hub used for?

The RULAND MANUFACTURING JS21-5-A is a zero-backlash curved jaw coupling hub used to connect two shafts in motion-control systems. It is commonly applied in servo motors, encoders, and precision positioning equipment where accurate torque transmission and misalignment compensation are required.

What are the specifications of the RULAND MANUFACTURING JS21-5-A coupling hub?

The JS21-5-A is a JS21-size jaw coupling hub with a 1 5/16 in outside diameter, made of aluminum. It is designed for inch-dimension shafts and is part of RULAND MANUFACTURING's zero-backlash curved jaw coupling series. The manufacturer part number is JS21-5-A.

Where to buy the RULAND MANUFACTURING JS21-5-A coupling hub worldwide?

3G Electric supplies the RULAND MANUFACTURING JS21-5-A coupling hub worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this 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 coupling size (e.g., JS21) to your shaft diameters and torque requirements. The hub outside diameter and bore size must align with your system's specifications. Consult the manufacturer's catalog for load ratings and misalignment limits.

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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