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

This RULAND MANUFACTURING Motion Control Coupling is a clamp-on bellows shaft coupling for round shafts, featuring a 1/2 in bore diameter on one end and a 3/8 in bore diameter on the other. It is constructed with a…

SKU 3G-OTH-135604

Also listed as: BC2186A · BC21 8 6 A

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

Technical Documents

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

Product Description

This RULAND MANUFACTURING Motion Control Coupling is a clamp-on bellows shaft coupling for round shafts, featuring a 1/2 in bore diameter on one end and a 3/8 in bore diameter on the other. It is constructed with a stainless steel bellows and an aluminum body, and it accommodates different bore dimensions. The coupling is designed for inch-sized shafts and is identified by manufacturer part number BC21-8-6-A.

Frequently Asked Questions

What is a RULAND MANUFACTURING clamp-on bellows shaft coupling used for?

This coupling connects two round shafts of different diameters (1/2 in and 3/8 in) in motion control applications. It compensates for misalignment while transmitting torque smoothly, making it ideal for precision positioning systems, encoders, and servo drives in industrial automation.

What are the specifications of the RULAND MANUFACTURING BC21-8-6-A coupling?

The BC21-8-6-A is a clamp-on bellows coupling with a 1/2 in bore on one end and a 3/8 in bore on the other. It features a stainless steel bellows and an aluminum body, designed for inch-sized shafts. The coupling accommodates different bore dimensions and is made by RULAND MANUFACTURING.

Where to buy RULAND MANUFACTURING couplings in worldwide?

3G Electric supplies RULAND MANUFACTURING motion control couplings worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us to source the BC21-8-6-A or other RULAND MANUFACTURING components for your application.

How to install a RULAND MANUFACTURING clamp-on bellows coupling?

Clean both shaft ends and the coupling bores. Loosen the clamp screws, slide the coupling onto the shafts, and align the equipment. Tighten the screws evenly to the manufacturer's recommended torque using a hex key. Verify runout with a dial indicator before finalizing the 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.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 5/16 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-5-A)
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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 3/8 in and 5/16 in. It features a stainless steel bellows and an aluminum hub, providing zero backlash and high torsional stiffness for precision motion control applications such as positioning systems and encoders
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This clamp-on bellows shaft coupling connects two round shafts with bore diameters of 3/8 in and 5/16 in. It features a stainless steel bellows and an aluminum hub, providing zero backlash and high torsional stiffness for precision motion control applications such as positioning systems and encoders
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RULAND MANUFACTURING Motion Control Coupling: 5/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-10-6-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: 1/2 in Bore Dia 1, 1/2 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-8-A)
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RULAND MANUFACTURING Motion Control Coupling: 1/2 in Bore Dia 1, 1/2 in Bore Dia 2, Aluminum, Inch (MPN BC21-8-8-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)
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RULAND MANUFACTURING Motion Control Coupling: 3/8 in Bore Dia 1, 3/8 in Bore Dia 2, Aluminum, Inch (MPN BC21-6-6-A)

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