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Black oxide steel step-down adapter clamp with 7/8 inch bore and 5/8 inch shaft

Climax Metal Products

Climax Metal Products SDA-087 Step Down Adapter Clamp On 7/8 In Bore

SKU CH-R85W-SM73Q

A step-down adapter with a 7/8 inch bore and 5/8 inch shaft diameter, made from ASTM A108 steel with black oxide finish

  • TypeCouplings, Collars & Adapters
  • Reduces shaft diameter from 7/8 in to 5/8 in for flexible coupling
  • Black oxide finish on ASTM A108 steel resists corrosion in harsh environments
  • Precision bore tolerance of +0.003/-0.000 ensures accurate alignment
  • Hardened ASTM A574 steel set screw provides secure clamping force
  • Compact 3 5/8 in overall length fits tight machinery spaces

Step Down Adapter for 7/8 Inch Bore

This Climax Metal Products adapter reduces a 7/8 inch bore to a 5/8 inch shaft for power transmission assemblies. It suits maintenance engineers and machine shops that need to join mismatched shaft and hub diameters in inch based systems.

Clamp On Design with Black Oxide Finish

The clamp on collar uses a 1/4-28 set screw to lock onto the shaft without keyways or welding. A black oxide coating on ASTM A108 steel body and ASTM A574 screw resists corrosion in workshop environments.

Bore Tolerance of +0.003 / -0.000 Inch

The tight bore tolerance ensures a precise interference fit on the 7/8 inch hub. Builders who require a looser clearance fit or a different bore size must select another adapter.

Highlights

  • Reduces shaft diameter from 7/8 in to 5/8 in for flexible coupling
  • Black oxide finish on ASTM A108 steel resists corrosion in harsh environments
  • Precision bore tolerance of +0.003/-0.000 ensures accurate alignment
  • Hardened ASTM A574 steel set screw provides secure clamping force
  • Compact 3 5/8 in overall length fits tight machinery spaces

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

Will the 1/4-28 set screw need periodic retightening?

The 1/4-28 screw is grade ASTM A574 steel; check torque after initial run-in and at scheduled maintenance intervals.

What dimensional limit is reached first under continuous load?

The bore tolerance of +0.003/-0.000 inch and shaft tolerance of -0.000/-0.003 inch define the fit envelope that governs load capacity.

Does the black-oxide finish affect heat buildup during all-day operation?

The black oxide coating on ASTM A108 steel provides corrosion resistance without measurable thermal impact in steady-state use.

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