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Steel QT bushing, 38 mm bore, 1.25 in long, 2.5 in OD, transparent finish

Tb Wood'S

Tb Wood'S QT 38 mm Bushing 1.25 in collectible

SKU CH-NGAD-NQW1N

Quick-detachable steel bushing with 38 mm bore, 1.25 in length, 2.5 in overall diameter and included cap screws

  • Product typeBearings, V-belts & Power Transmission Equipment
  • Product colorTransparent
  • Quick-detach design speeds shaft changes
  • 38 mm bore fits metric shafts precisely
  • Split flange with 10 mm keyway prevents slippage
  • SAE Grade 5 steel handles high torque loads
  • Includes two cap screws for immediate installation

Quick-Detachable Steel Bushing

This new TB WOODS QT-series bushing is a steel power-transmission component with a 38 mm bore and 1.25 in overall length. It uses a split-flange, quick-detachable design that clamps onto a keyed shaft with two included SAE Grade 5 cap screws. The 1.625 in bushing diameter and 2.5 in overall diameter suit standard QT-series hubs.

Fit for keyed-shaft drives needing QT mounting

Maintenance teams and OEM builders who need a metric 38 mm bore with imperial 1.25 in length will find the dimensions match. The 10 mm keyway width and 3.5 mm keyway height follow the QT profile. Buyers who require a different bore size, a longer through-length, or a non-keyed shaft interface should look elsewhere.

The 38 mm bore diameter decides compatibility

The bore is the single dimension that must match the shaft exactly; a 38 mm shaft is required. The 1.25 in length, 2 in bolt-circle diameter, and 1/4-20 x 1 in cap screws are fixed by the QT standard. Verify the shaft diameter before ordering.

How it compares

Measured against everything we stock in Fan Collectibles & Memorabilia, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 94% of the 1,367 comparable items (median $26.99).

Specifications

Product
Brand nameTB WOODS
Product typeBearings, V-belts & Power Transmission Equipment
Product colorTransparent

Questions about this item

How do I install the QT bushing on a 38 mm keyed shaft, and which step is often missed?

Slide the bushing onto the shaft, align the 10 mm wide by 3.5 mm high keyway, insert the two 1/4 in.-20 x 1 in cap screws into the 2 in bolt circle, and torque them evenly; the step often missed is tightening the screws in a cross pattern to seat the 3/4 in per ft taper fully.

What maintenance or replacement will the QT bushing need over time?

Inspect the steel bushing and cap screws for wear or corrosion periodically; replace the bushing if the 1.625 in bore shows fretting or the 1/4 in flange width cracks, and replace cap screws if threads stretch or heads round off.

What limit appears first when the QT bushing runs under sustained load?

The SAE Grade 5 cap screws reach their clamping limit before the steel body yields, so sustained torque that exceeds the fastener preload will cause slip at the 3/4 in per ft taper interface first.

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