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Three-arm brake cylinder hone with adjustable flexible shaft and medium grit stones

Powerbuilt

Powerbuilt 3 Arm Brake Cylinder Hone 3/4 to 2-1/4 Inch Range 648401

SKU CH-ZE83-F8RD7

A three-arm brake cylinder hone covering 3/4 to 2-1/4 inch bores, self-centering on a flexible shaft for on-car or bench use with 220 grit stones

  • Product typeKeepsakes
  • Hones cylinder bores from 3/4" to 2-1/4" diameter
  • Fits 3/8" drive power drills for powered operation
  • Self-aligning and self-centering design ensures accurate honing
  • Flexible shaft with adjustable tension for on-car or off-car use
  • Includes #220 medium grit stones, 1-1/8" length

Brake cylinder hone for 3/4–2-1/4" bores

This Powerbuilt specialty tool hones brake-cylinder bores from 3/4 inch to 2-1/4 inch diameter. It fits a 3/8" drive power drill and uses a flexible shaft with adjustable tension for on-car or bench work. The kit includes #220 medium-grit stones measuring 1-1/8 inch long. It is built for professional mechanics and weekend DIYers alike.

Self-centring action with adjustable shaft tension

The three-arm design self-aligns and self-centres inside the bore, delivering an even finish without manual pressure. Adjustable tension on the flexible shaft lets the operator control stone contact for consistent material removal. No cooling system or external power beyond the drill is required, so noise and vibration stay at typical hand-drill levels.

Fits standard 3/8" drill chucks for portable use

Because it mounts in any 3/8" drill chuck, the hone works with corded or cordless drills already in the shop. The flexible shaft reaches cylinders on or off the vehicle, freeing the user from a fixed bench setup. Medium-grit stones handle general brake-cylinder refinishing; finer or coarser grades are not supplied. Lifetime warranty covers the tool against defects.

How it compares

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Price $9.99
Cheaper than about 90% of the 526 comparable items (median $27.99).

Specifications

Product
Product typeKeepsakes

Questions about this item

How do I install the hone in a 3/8 inch drive drill and what step is often missed?

Chuck the flexible shaft into a 3/8 inch drive drill, set the adjustable tension so the three arms self-centre in the bore, then run the drill at low speed while feeding the hone smoothly.

When will the included #220 medium grit stones need replacement?

Replace the 1-1/8 inch long #220 stones when the cutting surface glazes over or the stone diameter wears enough that the arms no longer contact the cylinder wall evenly.

What limit appears first during prolonged honing of a 2-1/4 inch bore?

Stone wear becomes the limiting factor first; as the #220 grit dulls, material removal slows and the arms can no longer maintain consistent contact across the full 3/4 to 2-1/4 inch range.

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