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Black oxide steel step-down adapter with clamp-on bore and set screw

Climax Metal Products

Climax Metal Products SDA-075 Step Down Adapter 3/4 in Bore

SKU CH-SE5G-KVZK8

A step-down adapter with a 3/4 in bore, 1/2 in shaft diameter and 3 1/2 in overall length, made from ASTM A108 steel with black oxide finish

  • Steps down from 3/4 in bore to 1/2 in shaft for flexible mounting
  • Steel body with black oxide finish resists corrosion in shop environments
  • Precision bore tolerance +.003/-.000 ensures accurate fit on shafts
  • Grade 8 set screw (ASTM A574) locks adapter securely in place
  • Compact 3-1/2 in overall length fits tight machine spaces

Step-Down Adapter for 3/4 Inch Bore

This Climax Metal Products step-down adapter fits a 3/4 inch bore and provides a 1/2 inch output shaft. It is intended for machinery builders who need to connect a smaller shaft to a larger hub. The clamp-on design secures the adapter with a 1/4-28 set screw. The overall length is 3 1/2 inches.

Steel Construction with Black Oxide Finish

The adapter body is made from ASTM A108 grade steel with a black oxide coating for corrosion resistance. The set screw uses ASTM A574 alloy steel. Bore tolerance is held to +0.003/-0.000 inches while shaft tolerance is -0.000/-0.003 inches. These tolerances ensure a precise interference fit.

Verify Bore and Shaft Dimensions Before Ordering

Confirm that your driven component has a 3/4 inch bore with a depth of at least 1 5/8 inches. Ensure the driving shaft measures exactly 1/2 inch in diameter. Check that the 1/4-28 set screw thread matches your locking requirements and that the 3 1/2 inch overall length fits your assembly space.

Highlights

  • Steps down from 3/4 in bore to 1/2 in shaft for flexible mounting
  • Steel body with black oxide finish resists corrosion in shop environments
  • Precision bore tolerance +.003/-.000 ensures accurate fit on shafts
  • Grade 8 set screw (ASTM A574) locks adapter securely in place
  • Compact 3-1/2 in overall length fits tight machine spaces

Specifications

No published specifications for this item yet.

Questions about this item

What bore diameter does the 3/4 in adapter accept, and what tolerance applies?

The adapter accepts a 3/4 in bore with a tolerance of +0.003 / -0.000 in, allowing a precise fit on the shaft.

What shaft diameter and overall length does the SDA-075 require for mounting?

The step-down adapter provides a 1/2 in shaft diameter with -0.000 / -0.003 in tolerance and an overall length of 3 1/2 in for mounting clearance.

How is the adapter secured to the shaft, and which detail is often missed?

A 1/4 in.-28 set screw, 5/8 in long and made from ASTM A574 steel, clamps the adapter; the screw must be tightened against the shaft flat for a secure hold.

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