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Black oxide steel shaft collar, one-piece clamp style, 2-3/4 inch bore

Ruland Manufacturing

Ruland Manufacturing CL-44-F Shaft Collar 2-3/4 in Steel

SKU CH-EZMS-153RQ

One-piece steel shaft collar clamps a 2-3/4 in bore with alloy-steel screw and black-oxide 1215 carbon steel finish

  • TypeCouplings, Collars & Adapters
  • Black oxide finish resists corrosion on 1215 lead-free steel
  • One-piece clamp design ensures secure shaft grip
  • 27 in clearance diameter fits 2-3/4 in round bores
  • Alloy steel screw provides reliable locking force
  • Carbon steel construction delivers strength for power transmission

2-3/4 Inch Steel Shaft Collar

The Ruland Manufacturing CL-44-F is a one-piece clamp-style shaft collar with a 2-3/4 inch round bore and a 4 inch outside diameter. It is machined from 1215 carbon steel with a black oxide finish and uses an alloy steel screw for secure locking on inch-sized shafts.

Thermal and Power Characteristics

As a passive mechanical fastener, this collar generates no heat and draws no electrical power during operation. It produces no audible noise and requires no cooling or external energy source in normal use.

Critical Fit Specification

The 4.27 inch clearance diameter determines whether the collar clears adjacent components on the shaft. Buyers needing a smaller clearance envelope or a two-piece split design for installation without shaft removal should consider other configurations.

Highlights

  • Black oxide finish resists corrosion on 1215 lead-free steel
  • One-piece clamp design ensures secure shaft grip
  • 27 in clearance diameter fits 2-3/4 in round bores
  • Alloy steel screw provides reliable locking force
  • Carbon steel construction delivers strength for power transmission

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

How do I install the CL-44-F shaft collar on a 2-3/4 in shaft and what step is commonly missed?

Slide the 1-piece clamp collar onto the shaft, position it, then torque the alloy steel screw to the manufacturer's specification; the step often missed is verifying the 4.27 in clearance diameter clears adjacent components before final tightening.

What maintenance or replacement will the CL-44-F shaft collar need over time?

Periodically check the alloy steel screw torque and inspect the black oxide 1215 lead-free steel for wear or corrosion; replace the collar if the bore shows elongation, the screw threads strip, or the finish degrades beyond surface oxidation.

What is the first limit that appears when the CL-44-F shaft collar runs under sustained load?

The holding power of the single alloy steel screw on the 1215 carbon steel collar is the primary limit; under sustained axial or torsional load the clamp force can relax, causing slip before the material itself yields.

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