RULAND MANUFACTURINGAluminum Shaft Collars

RULAND MANUFACTURING Shaft Collar: 2-Piece, Inch, Round, Clamp-On, 1 5/16 in Bore Dia

The RULAND MANUFACTURING Shaft Collar is a 2-piece, inch, round, clamp-on aluminum shaft collar with a 1 5/16 in bore diameter (MPN SP-21-A). It is designed for secure shaft mounting in industrial applications.

SKU 3G-OTH-132289

Brand

RULAND MANUFACTURING

Item

Shaft Collar: 2-Piece, Inch, Round, Clamp-On, 1 5/16 in Bore Dia

Technical Specifications

RULAND MANUFACTURING

Manufacturer Part Number

SP-21-A 

Type

Inch, Round, Clamp-On, Aluminum 

Bore Dia

1 5/16 in 

View Full Spec Sheet

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 2-piece shaft collar used for?

A Ruland Manufacturing 2-piece shaft collar is used to position, secure, or limit components on a shaft without marring the surface. It is commonly applied in power transmission, conveyor systems, and industrial machinery where precise axial positioning is required.

What are the specifications of the Ruland SP-21-A shaft collar?

The Ruland SP-21-A is a 2-piece, round, clamp-on shaft collar with a 1 5/16 in bore diameter. It is made of aluminum and is designed for inch shafts. The clamp-on style provides secure, repeatable positioning without damaging the shaft.

Where to buy a Ruland SP-21-A shaft collar worldwide?

You can source the Ruland SP-21-A shaft collar from 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.

How to install a Ruland 2-piece clamp-on shaft collar?

To install a Ruland 2-piece clamp-on shaft collar, place the two halves around the shaft at the desired position. Align the mating surfaces, then tighten the screws evenly to the manufacturer's recommended torque. This ensures secure clamping without shaft damage.

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 aluminum shaft collars. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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