RULAND MANUFACTURINGZero-Backlash Curved Jaw Coupling Hubs

RULAND MANUFACTURING Zero-Backlash Curved Jaw Coupling Hub

The RULAND MANUFACTURING JS21-10-A is a zero-backlash curved jaw coupling hub in the JS21 coupling size, constructed from aluminum with an outside diameter of 1 5/16 inches. This inch-type hub is designed for motion…

SKU 3G-OTH-134390

Also listed as: JS2110A · JS21 10 A

Brand

RULAND MANUFACTURING

Item

Zero-Backlash Curved Jaw Coupling Hub

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

RULAND MANUFACTURING

Manufacturer Part Number

JS21-10-A 

Type

Inch, Aluminum 

Outside Dia

1 5/16 in 

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 JS21-10-A jaw coupling hub used for?

The RULAND MANUFACTURING JS21-10-A is a zero-backlash curved jaw coupling hub used to connect two rotating 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 JS21-10-A coupling hub?

The JS21-10-A is a JS21 coupling size hub with a 1 5/16 in outside diameter, made of aluminum. It is part of RULAND MANUFACTURING's zero-backlash curved jaw coupling hub series, designed for inch-sized shafts. The manufacturer part number is JS21-10-A.

Where to buy RULAND MANUFACTURING JS21-10-A coupling hubs worldwide?

3G Electric supplies RULAND MANUFACTURING JS21-10-A coupling hubs 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 hub bore size to your shaft diameter and confirm the coupling size (e.g., JS21) fits your torque and misalignment needs. The JS21-10-A has a 1 5/16 in outside diameter and is designed for inch shafts. Consult RULAND's catalog for load ratings.

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 →