We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

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 JC21-6-A is a zero-backlash curved jaw coupling hub in the JC21 coupling size, made of inch-dimension aluminum with a 1 5/16 in outside diameter. This hub is designed for motion-control…

SKU 3G-OTH-134259

Also listed as: JC216A · JC21 6 A

Brand
RULAND MANUFACTURING
Item
Zero-Backlash Curved Jaw Coupling Hub
Category
Zero-Backlash Curved Jaw Coupling Hubs
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

RULAND MANUFACTURING
Manufacturer Part Number
JC21-6-A
Type
Inch, Aluminum
Outside Dia
1 5/16 in

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

RULAND MANUFACTURING Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The RULAND MANUFACTURING JC21-6-A is a zero-backlash curved jaw coupling hub in the JC21 coupling size, made of inch-dimension aluminum with a 1 5/16 in outside diameter. This hub is designed for motion-control applications requiring precise torque transmission without backlash.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a Ruland Manufacturing jaw coupling hub used for?

A Ruland Manufacturing jaw coupling hub connects two shafts in motion-control systems, transmitting torque while accommodating minor misalignment. It is commonly used in servo motors, encoders, and industrial automation equipment where zero-backlash operation is critical for precision positioning and reduced vibration.

What are the specifications of the Ruland Manufacturing JC21-6-A jaw coupling hub?

The Ruland Manufacturing JC21-6-A is a zero-backlash curved jaw coupling hub in the JC21 coupling size. It has a 1 5/16 in outside diameter, is made of aluminum, and is designed for inch-series shafts. The manufacturer part number is JC21-6-A.

Where to buy a Ruland Manufacturing JC21-6-A jaw coupling hub worldwide?

3G Electric supplies and delivers the Ruland Manufacturing JC21-6-A jaw coupling hub worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order reaches any international destination. Contact us for availability and lead time.

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., JC21) to your shaft diameters and torque requirements. Verify the outside diameter (1 5/16 in for JC21) and material (aluminum for low inertia). Always consult the manufacturer's catalog for bore and keyway specifications.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
This zero-backlash curved jaw coupling hub is made of aluminum with a 1 5/16 in outside diameter. It is designed for motion-control applications requiring precise torque transmission without backlash, accommodating misalignment between connected shafts. Typical uses include servo motors, encoders, and other precision drive systems
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub is made of aluminum with a 1 5/16 in outside diameter. It is designed for motion-control applications requiring precise torque transmission without backlash, accommodating misalignment between connected shafts. Typical uses include servo motors, encoders, and other precision drive systems
This zero-backlash curved jaw coupling hub from RULAND MANUFACTURING is designed for precise torque transmission in motion control systems. Made of aluminum with an outside diameter of 1 5/16 in, it accommodates misalignment while maintaining accuracy. Suitable for applications such as servo motors, encoders, packaging, robotics, and CNC machinery
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub from RULAND MANUFACTURING is designed for precise torque transmission in motion control systems. Made of aluminum with an outside diameter of 1 5/16 in, it accommodates misalignment while maintaining accuracy. Suitable for applications such as servo motors, encoders, packaging, robotics, and CNC machinery
This aluminum zero-backlash curved jaw coupling hub has a 1 5/16 in outside diameter and is designed for inch-series JC21 couplings. It connects two shafts in motion-control systems, accommodating misalignment and dampening vibration in industrial machinery, packaging equipment, and servo-drive applications. The aluminum construction provides low inertia for high-speed operation
RULAND MANUFACTURING
This aluminum zero-backlash curved jaw coupling hub has a 1 5/16 in outside diameter and is designed for inch-series JC21 couplings. It connects two shafts in motion-control systems, accommodating misalignment and dampening vibration in industrial machinery, packaging equipment, and servo-drive applications. The aluminum construction provides low inertia for high-speed operation
This zero-backlash curved jaw coupling hub is made of aluminum and has a 1 5/16 in outside diameter. It is designed for inch-series applications requiring precise torque transmission. Typical uses include connecting shafts in power transmission systems such as pumps, gearboxes, and conveyors
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub is made of aluminum and has a 1 5/16 in outside diameter. It is designed for inch-series applications requiring precise torque transmission. Typical uses include connecting shafts in power transmission systems such as pumps, gearboxes, and conveyors
Aluminum zero-backlash curved jaw coupling hub with 1 5/16 in outside diameter. Inch series, JC21 coupling size. Used to connect shafts in power transmission applications, accommodating minor misalignment and providing vibration damping
RULAND MANUFACTURING
Aluminum zero-backlash curved jaw coupling hub with 1 5/16 in outside diameter. Inch series, JC21 coupling size. Used to connect shafts in power transmission applications, accommodating minor misalignment and providing vibration damping
RULAND MANUFACTURING Jaw Coupling Hub: JC21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JCC21-8-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Jaw Coupling Hub: JC21 Coupling Size, 1 5/16 in Outside Dia, Inch, Aluminum (MPN JCC21-8-A)

More from RULAND MANUFACTURING

View all RULAND MANUFACTURING parts
This zero-backlash curved jaw coupling hub is made of aluminum with an inch-series design and 2 in outside diameter. It is intended for use in motion control systems to connect shafts while compensating for minor misalignment and transmitting torque accurately. Typical applications include servo motors, encoders, and precision positioning equipment
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub is made of aluminum with an inch-series design and 2 in outside diameter. It is intended for use in motion control systems to connect shafts while compensating for minor misalignment and transmitting torque accurately. Typical applications include servo motors, encoders, and precision positioning equipment
This aluminum curved jaw coupling hub is designed for use with matching jaw couplings to transmit torque while accommodating misalignment. It features a 2 3/4 in outside diameter and inch dimensions, suitable for power transmission systems requiring precise positioning and vibration damping
RULAND MANUFACTURING
This aluminum curved jaw coupling hub is designed for use with matching jaw couplings to transmit torque while accommodating misalignment. It features a 2 3/4 in outside diameter and inch dimensions, suitable for power transmission systems requiring precise positioning and vibration damping
This zero-backlash curved jaw coupling hub is made of aluminum with a 3 1/8 in outside diameter. It is designed for inch-series applications and is part of the JC50 coupling size. Used in power transmission to connect shafts, it accommodates minor misalignment while transmitting torque. Typical applications include motion control, packaging, and automation equipment
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub is made of aluminum with a 3 1/8 in outside diameter. It is designed for inch-series applications and is part of the JC50 coupling size. Used in power transmission to connect shafts, it accommodates minor misalignment while transmitting torque. Typical applications include motion control, packaging, and automation equipment
Inch-dimensioned aluminum hub for JC36 curved jaw couplings. Outside diameter 2 1/4 in. Connects two shafts in motion-control systems, compensating for minor misalignment while transmitting torque. Used with matching curved jaw spiders in servo motors, encoders, and precision positioning equipment
RULAND MANUFACTURING
Inch-dimensioned aluminum hub for JC36 curved jaw couplings. Outside diameter 2 1/4 in. Connects two shafts in motion-control systems, compensating for minor misalignment while transmitting torque. Used with matching curved jaw spiders in servo motors, encoders, and precision positioning equipment
Metric aluminum hub with 33.3 mm outside diameter for zero-backlash curved jaw couplings. Connects rotating shafts while compensating for minor misalignment in motion control, packaging, and automation equipment
RULAND MANUFACTURING
Metric aluminum hub with 33.3 mm outside diameter for zero-backlash curved jaw couplings. Connects rotating shafts while compensating for minor misalignment in motion control, packaging, and automation equipment
Aluminum curved jaw coupling hub for JC16 coupling size. Inch design with 1 in outside diameter. Used in motion-control systems to connect shafts, transmit torque, and accommodate minor misalignment while reducing vibration and backlash
RULAND MANUFACTURING
Aluminum curved jaw coupling hub for JC16 coupling size. Inch design with 1 in outside diameter. Used in motion-control systems to connect shafts, transmit torque, and accommodate minor misalignment while reducing vibration and backlash
This zero-backlash curved jaw coupling hub is made of aluminum with a 50.8 mm outside diameter. It is designed for precision motion control applications requiring accurate torque transmission without backlash, accommodating misalignment while transmitting torque smoothly
RULAND MANUFACTURING
This zero-backlash curved jaw coupling hub is made of aluminum with a 50.8 mm outside diameter. It is designed for precision motion control applications requiring accurate torque transmission without backlash, accommodating misalignment while transmitting torque smoothly
Zero-backlash curved jaw coupling hub for motion control applications. Made of metric aluminum with 57.2 mm outside diameter. Compensates for minor misalignment while transmitting torque without backlash. Used in servo motors, encoders, and precision positioning systems
RULAND MANUFACTURING
Zero-backlash curved jaw coupling hub for motion control applications. Made of metric aluminum with 57.2 mm outside diameter. Compensates for minor misalignment while transmitting torque without backlash. Used in servo motors, encoders, and precision positioning systems