know how to reboring QD bush and Taper lock bush
21 May, 2021

Sintered steel having a yield strength of 1020 hot iron is used to manufacture reboring QD bush and taper lock bushing.

Unlike other bushings, reboring QD bush and Taper lock bushing are furnished without a saw slot. For QD bushings, the saw slot is the end step and is used to cut opposite the keyway. On the contrary, the taper lock bushing is cut opposite the threaded half-hole.

Use high-speed steel tools with 0.005” nose radius, 12° side relief angle, 16.5° back rake angle, the side rake angle of 14°, and front relief angle of 8°.

High-speed steel broach to cut keyway

Use an “A” taper raker tooth saw at 150 per minute speed.

Features & Benefits

  • Sprockets, timing pulleys require taper bushing.
  • No additional alteration is required. Moreover, these bushings suit almost all types of assemblies and sizes.
  • These are best suited for mechanical connections.
  • To complete designations add bore size. For example, a 1215 taper bushing requires a 16mm bore.
  • Doesn’t require a costly reboring: the full range of metric and imperial sizes are available
  • Application is dependent on hub diameter
  • A short reach range is available for compact lightweight assemblies.
  • Installation and removal are simple.
  • Tapped and Taper bored, drilled consist QD weld-on hubs.

Features of QD bushing


Sintered steel

Cast iron

Ductile iron

Steel and stainless steel

Modifications / accessories

Special bores and keyseats also have reborable bushings.

These are best for any kind of application that requires mounting.

Synchronous drives, mechanical drive components, roller chain drives.

The following materials are used to make reborate bushings, with approximate tensile strengths shown.

30 kg of cast iron

Sintered Steel 50 (similar properties to 1020 hot)

Steel that has been rotted)

Kai (97)

For the most amount of carbide, use high-speed steer with the following:

The study of geometry

0.005 angular side relief 12

The eleventh radius

The angle of the front neilet

The main difference is around the outside diameter in QD, whereas the taper lock has straight sides.

To drive the bushing into the bore, the taper bushing uses a set screw.

QD bushings have a compact design and a proven industry standard. It does not require wobble and also gives a superior performance.


Knowing these differences between QD bushings and Taper lock is important before reboring. Also, take the necessary precautions before starting with the procedure. Lubricants or anti-seize compounds should not be used on tapered bores, shafts, or screws.

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