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RULAND MANUFACTURING Zero-Backlash Curved Jaw Coupling Hub - Zero-Backlash Curved Jaw Coupling Hubs
RULAND MANUFACTURINGZero-Backlash Curved Jaw Coupling Hubs

RULAND MANUFACTURING Zero-Backlash Curved Jaw Coupling Hub

The RULAND MANUFACTURING JSC21-8-A is a zero-backlash curved jaw coupling hub in the JS21 coupling size, made of inch-dimensioned aluminum with a 1 5/16 in outside diameter. This component is designed for motion…

SKU 3G-OTH-134317

Also listed as: JSC218A · JSC21 8 A

Brand
RULAND MANUFACTURING
Item
Zero-Backlash Curved Jaw Coupling Hub
Category
Zero-Backlash Curved Jaw Coupling Hubs
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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
JSC21-8-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

The RULAND MANUFACTURING JSC21-8-A is a zero-backlash curved jaw coupling hub in the JS21 coupling size, made of inch-dimensioned aluminum with a 1 5/16 in outside diameter. This component is designed for motion control applications requiring precise torque transmission without backlash.

Frequently Asked Questions

What is a RULAND MANUFACTURING JS21 jaw coupling hub used for?

A RULAND MANUFACTURING JS21 jaw coupling hub is used in motion control and power transmission systems to connect two shafts while compensating for minor misalignment. It is ideal for servo motors, encoders, and precision machinery where zero-backlash operation is required.

What are the specifications of the RULAND MANUFACTURING JSC21-8-A jaw coupling hub?

The RULAND MANUFACTURING JSC21-8-A is a zero-backlash curved jaw coupling hub with a JS21 coupling size, 1 5/16 in outside diameter, and inch bore. It is made of aluminum and is designed for use with RULAND spider inserts to transmit torque without backlash.

Where to buy RULAND MANUFACTURING jaw coupling hubs worldwide?

You can source RULAND MANUFACTURING jaw coupling hubs worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the JSC21-8-A or other sizes.

How to select the correct RULAND MANUFACTURING jaw coupling hub for an application?

To select the correct RULAND MANUFACTURING jaw coupling hub, match the coupling size (e.g., JS21) to your shaft diameters and torque requirements. Ensure the hub bore fits your shaft, and choose the appropriate spider insert material for your operating conditions. Consult RULAND's technical data for precise sizing.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
RULAND MANUFACTURING Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JSC21-6-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JSC21-6-A)
RULAND MANUFACTURING Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JSC21-10-A)
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RULAND MANUFACTURING Jaw Coupling Hub: JS21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JSC21-10-A)
This inch-series aluminum curved jaw coupling hub has a 2 in outside diameter and is part of the JS32 coupling size. It is designed for use with a spider insert to accommodate misalignment and dampen vibration in power transmission applications such as pumps, gearboxes, and conveyors
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This inch-series aluminum curved jaw coupling hub has a 2 in outside diameter and is part of the JS32 coupling size. It is designed for use with a spider insert to accommodate misalignment and dampen vibration in power transmission applications such as pumps, gearboxes, and conveyors
RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JSC32-12-A)
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RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JSC32-12-A)
RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JS32-8-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JS32-8-A)
RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JSC32-16-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Jaw Coupling Hub: JS32 Coupling Size, 2 in Outside Dia, Inch, Aluminum, Curved (MPN JSC32-16-A)

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