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Aluminum Oldham coupling clamp hub, 1 inch outside diameter, 1.25 inch overall length, 1/4 inch bore

Ruland Manufacturing

Ruland Manufacturing OCT16-4-A Oldham Coupling Clamp 1/4 in Bore

SKU CH-F9RA-CC978

Oldham clamp coupling with 1/4 in bore, 1 in outside diameter, 1.25 in length, 4,500 RPM max speed, 0.5° angular and 0.008 in parallel misalignment capacity

  • TypeCouplings, Collars & Adapters
  • Clamp-on locking simplifies installation on 1/4 in shafts
  • Aluminium hubs reduce rotating mass for faster response
  • 5° angular misalignment tolerance protects connected components
  • 008 in parallel offset capacity handles shaft alignment errors
  • 4,500 RPM rating supports high-speed motion control applications

Application Fit

The Ruland OCT16-4-A Oldham coupling joins two 1/4 in round shafts with a clamp-on hub design. It handles angular misalignment of 0.5 degrees and parallel offset of 0.008 in while transmitting motion at up to 4,500 RPM. The aluminum hubs keep the assembly light for precision instrumentation and small automation axes.

Upgrade Path

This coupling replaces rigid or jaw-type connectors when shafts cannot be held to tight concentricity. The 0.004 in axial compliance absorbs thermal growth or assembly tolerance without preloading bearings. The jump is worth it when misalignment exceeds what a bellows or beam coupling can accept without side loads.

Sustained Operation

At continuous speeds near 4,500 RPM the aluminum hubs dissipate heat while the polymer center disc maintains the 0.1 in over-standard parallel misalignment limit. Clamp-on locking prevents backlash creep during long duty cycles. The 1.25 in overall length and 0.467 in bore engagement keep the package compact inside guarded machine envelopes.

Highlights

  • Clamp-on locking simplifies installation on 1/4 in shafts
  • Aluminium hubs reduce rotating mass for faster response
  • 5° angular misalignment tolerance protects connected components
  • 008 in parallel offset capacity handles shaft alignment errors
  • 4,500 RPM rating supports high-speed motion control applications

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

What bore diameter does the OCT16-4-A coupling clamp onto?

The coupling uses a clamp-on locking type for a 1/4 in round bore with a length through bore of 0.467 in and an outside diameter of 1 in.

How do you install the clamp-on hub correctly?

Slide each hub onto its shaft, align the center disc, then tighten the clamp screws evenly to secure the 1/4 in bore without over-torquing.

What wear items will need replacement over time?

The aluminum hubs and center disc handle angular misalignment up to 0.5 degrees and parallel misalignment of 0.008 in; inspect the disc for wear at 4,500 RPM max.

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