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Climax Metal Products SDA-100 step down adapter, steel with black oxide finish, clamp-on design, 1 inch bore

Climax Metal Products

Climax Metal Products SDA-100 Step Down Adapter, 1 in Bore

SKU CH-9BP0-1NTCG

A steel step-down adapter with a 1 in bore and 3/4 in shaft for power transmission applications

  • Precision bore fit with +0.003/-0.000 tolerance
  • Secure clamping via 1/4-28 set screw
  • Hardened ASTM A108 steel body resists wear
  • Black oxide finish protects against corrosion
  • Compact 3-5/8 in overall length saves space

Step-Down Adapter for 1 Inch Bores

The Climax Metal Products SDA-100 is a steel step-down adapter designed to connect a 1 inch bore to a 3/4 inch shaft. It suits maintenance technicians and machine-shop operators who need to reduce a bore size on existing equipment. The clamp-on design allows installation without dismantling the surrounding assembly.

Upgrade from makeshift bushings or loose fits

This adapter replaces improvised shims or worn-out bushings that allow play and vibration. The jump is worth it when a precise transition between a 1 inch bore and a 3/4 inch shaft is required to restore concentricity and torque transmission. The ASTM A108 steel body and ASTM A574 screw provide the necessary hardness for industrial duty cycles.

Fits into inch-system power-transmission builds

The adapter requires a 1 inch bore with a tolerance of +0.003/-0.000 inches and a 3/4 inch shaft held to -0.000/-0.003 inches. A 1/4-28 set screw secures the connection. The 2 inch bore depth and 1 1/4 inch shaft length determine the engagement window, while the 2 inch outside diameter clears adjacent components in standard inch-series hubs.

Highlights

  • Precision bore fit with +0.003/-0.000 tolerance
  • Secure clamping via 1/4-28 set screw
  • Hardened ASTM A108 steel body resists wear
  • Black oxide finish protects against corrosion
  • Compact 3-5/8 in overall length saves space

Specifications

No published specifications for this item yet.

Questions about this item

What bore diameter does the SDA-100 adapter fit onto?

The adapter accepts a 1 in bore with a tolerance of +0.003/-0.000 in.

How do you secure the step down adapter to the shaft, and what mistake should be avoided?

Clamp it on using the 1/4 in.-28 set screw; the common error is not tightening the screw fully against the shaft flat.

When will the black oxide finish or set screw need replacement?

The black oxide coating on the ASTM A108 steel body wears over time; replace the ASTM A574 screw if threads strip or the 5/8 in. length no longer clamps securely.

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