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

RULAND MANUFACTURING Motion Control Coupling: 3/8 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum - Clamp-On Bellows Shaft Couplings for Round Shafts
RULAND MANUFACTURINGClamp-On Bellows Shaft Couplings for Round Shafts

RULAND MANUFACTURING Motion Control Coupling: 3/8 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum

The RULAND MANUFACTURING BC21-6-5-A is a clamp-on bellows shaft coupling for round shafts, featuring a 3/8 in bore diameter 1 and a 5/16 in bore diameter 2. It is constructed with stainless steel bellows and an…

SKU 3G-OTH-135581

Also listed as: BC2165A · BC21 6 5 A

Brand
RULAND MANUFACTURING
Item
Motion Control Coupling: 3/8 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum
Category
Clamp-On Bellows Shaft Couplings for Round Shafts
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
BC21-6-5-A
Type
5/16 in Bore Dia 2, Aluminum, Inch

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 BC21-6-5-A is a clamp-on bellows shaft coupling for round shafts, featuring a 3/8 in bore diameter 1 and a 5/16 in bore diameter 2. It is constructed with stainless steel bellows and an aluminum hub, designed for inch-dimension shafts. This motion control coupling accommodates different bore dimensions and is suitable for precision positioning applications.

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 the RULAND MANUFACTURING BC21-6-5-A coupling used for?

The RULAND MANUFACTURING BC21-6-5-A is a clamp-on bellows shaft coupling designed for precision positioning applications. It connects two round shafts with different bore diameters (3/8 in and 5/16 in) in motion control systems, such as CNC machinery, robotics, and encoders, where zero backlash and high torsional stiffness are required.

What are the specifications of the RULAND MANUFACTURING BC21-6-5-A?

The BC21-6-5-A has a 3/8 in bore diameter 1 and a 5/16 in bore diameter 2, with a stainless steel bellows and aluminum hub. It is an inch-dimension coupling from RULAND MANUFACTURING, part number BC21-6-5-A, designed for different bore dimensions and clamp-on mounting on round shafts.

Where to buy the RULAND MANUFACTURING BC21-6-5-A worldwide?

You can source the RULAND MANUFACTURING BC21-6-5-A coupling through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide competitive sourcing for this motion control coupling.

How to install a clamp-on bellows coupling like the BC21-6-5-A?

To install the RULAND MANUFACTURING BC21-6-5-A, ensure shaft ends are clean and free of burrs. Loosen the clamp screws, slide the coupling onto both shafts, align the equipment, then tighten the screws evenly to the manufacturer's recommended torque. Avoid over-tightening to prevent bellows damage. Always verify shaft alignment after installation.

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 clamp-on bellows shaft couplings for round shafts. 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
RULAND MANUFACTURING Motion Control Coupling: 5/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-10-6-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Motion Control Coupling: 5/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-10-6-A)
RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-6-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-6-A)
RULAND MANUFACTURING Motion Control Coupling: 3/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-6-6-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Motion Control Coupling: 3/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-6-6-A)
RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-5-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-5-A)
This clamp-on bellows shaft coupling connects two round shafts with bore diameters of 5/8 in and 1/2 in. It features a stainless steel bellows and an aluminum body, designed for inch-sized shafts. Typical applications include motion control systems such as servo motors and encoders where zero backlash and misalignment compensation are required
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two round shafts with bore diameters of 5/8 in and 1/2 in. It features a stainless steel bellows and an aluminum body, designed for inch-sized shafts. Typical applications include motion control systems such as servo motors and encoders where zero backlash and misalignment compensation are required
RULAND MANUFACTURING Motion Control Coupling: 5/8 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum, Inch (MPN BC21-10-5-A)
RULAND MANUFACTURING
RULAND MANUFACTURING Motion Control Coupling: 5/8 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum, Inch (MPN BC21-10-5-A)

More from RULAND MANUFACTURING

View all RULAND MANUFACTURING parts
This clamp-on bellows shaft coupling connects two round shafts with 19 mm and 16 mm bores. It features an aluminum hub and stainless steel bellows, compensating for misalignment in motion control systems. Typical applications include connecting servo motors, encoders, and linear actuators in automation equipment
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two round shafts with 19 mm and 16 mm bores. It features an aluminum hub and stainless steel bellows, compensating for misalignment in motion control systems. Typical applications include connecting servo motors, encoders, and linear actuators in automation equipment
This clamp-on bellows shaft coupling connects two round shafts with 16 mm and 14 mm bore diameters. The aluminum hub and stainless steel bellows provide torsional stiffness and compensate for misalignment. Typical applications include connecting servo motors, encoders, and linear actuators in motion control systems
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two round shafts with 16 mm and 14 mm bore diameters. The aluminum hub and stainless steel bellows provide torsional stiffness and compensate for misalignment. Typical applications include connecting servo motors, encoders, and linear actuators in motion control systems
Stainless steel clamp-on bellows shaft coupling with 8 mm bore on one side and 6 mm bore on the other. Rated for maximum speed of 10,000 RPM. Used in motion control systems requiring zero backlash and high torsional stiffness, such as servo drives, encoders, and linear actuators
RULAND MANUFACTURING
Stainless steel clamp-on bellows shaft coupling with 8 mm bore on one side and 6 mm bore on the other. Rated for maximum speed of 10,000 RPM. Used in motion control systems requiring zero backlash and high torsional stiffness, such as servo drives, encoders, and linear actuators
This clamp-on bellows shaft coupling connects two shafts with a 3/8 in bore and a 6 mm bore, featuring a 1 in outside diameter. It is constructed of stainless steel and provides zero-backlash torque transmission with high torsional stiffness, compensating for misalignment in motion-control systems
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two shafts with a 3/8 in bore and a 6 mm bore, featuring a 1 in outside diameter. It is constructed of stainless steel and provides zero-backlash torque transmission with high torsional stiffness, compensating for misalignment in motion-control systems
This clamp-on bellows shaft coupling connects two round shafts with 8 mm and 6 mm bore diameters. It is made of stainless steel and rated for speeds up to 10,000 RPM. Typical applications include motion control systems requiring precise shaft alignment, such as connecting servo motors, encoders, or linear actuators
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two round shafts with 8 mm and 6 mm bore diameters. It is made of stainless steel and rated for speeds up to 10,000 RPM. Typical applications include motion control systems requiring precise shaft alignment, such as connecting servo motors, encoders, or linear actuators
This clamp-on bellows shaft coupling from RULAND MANUFACTURING features a 20 mm bore diameter on both ends, an aluminum hub, and stainless steel bellows. It is designed for connecting round shafts in motion control applications requiring zero backlash and high torsional stiffness, such as servo motors, encoders, and precision positioning systems
RULAND MANUFACTURING
This clamp-on bellows shaft coupling from RULAND MANUFACTURING features a 20 mm bore diameter on both ends, an aluminum hub, and stainless steel bellows. It is designed for connecting round shafts in motion control applications requiring zero backlash and high torsional stiffness, such as servo motors, encoders, and precision positioning systems
This clamp-on bellows shaft coupling connects two rotating shafts with bore diameters of 25 mm and 5/8 in, enabling inch-to-metric applications. It accommodates misalignment while providing zero backlash, suitable for precision motion control and servo systems. The stainless steel construction offers corrosion resistance in industrial environments. Maximum speed is 10,000 RPM
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two rotating shafts with bore diameters of 25 mm and 5/8 in, enabling inch-to-metric applications. It accommodates misalignment while providing zero backlash, suitable for precision motion control and servo systems. The stainless steel construction offers corrosion resistance in industrial environments. Maximum speed is 10,000 RPM
This clamp-on bellows shaft coupling connects two round shafts, accommodating misalignment while transmitting torque. It features a 1 1/4 in bore diameter 1 and a 15 mm bore diameter 2, with a maximum speed of 10,000 RPM. Constructed of stainless steel, it has no keyway and is suited for motion-control systems requiring zero backlash and high torsional stiffness
RULAND MANUFACTURING
This clamp-on bellows shaft coupling connects two round shafts, accommodating misalignment while transmitting torque. It features a 1 1/4 in bore diameter 1 and a 15 mm bore diameter 2, with a maximum speed of 10,000 RPM. Constructed of stainless steel, it has no keyway and is suited for motion-control systems requiring zero backlash and high torsional stiffness