Turned stainless steel precision bushing with a finished bore and chamfered ends.

Precision Turned Parts

Precision Bushing

Name: Precision Bushing
Brand: Yiwu Hongpin Mechanical Equipment Company

A turned sleeve that carries a shaft, sets the running clearance and takes the wear instead of the housing.

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Made to your drawing. Every dimension below that depends on your print is marked To drawing rather than given a number that would only be a guess.

Overview

What This Part Does

A bushing does two jobs. It gives the shaft a bearing surface, and it makes wear a replaceable item rather than a reason to scrap a housing. Both jobs depend on the bore: its diameter relative to the shaft, its roundness once the bushing is pressed into the housing, and its finish. Hongpin turns bushings to drawing in stainless steel, aluminium alloy and engineering plastic, and will machine them as a matched pair with the shaft where the clearance is critical.

Key Benefits

Why It Is Made This Way

Wear goes where you want itThe bushing is the consumable, so the housing and the shaft survive.
Clearance controlled as a pairBore and shaft can be made together, which controls the difference rather than two separate dimensions.
Bore finished after pressing where neededA bore can close up when the bushing is pressed in; the drawing can call for finishing in situ.
Material chosen for the dutyStainless for washdown, aluminium for weight, engineering plastic for dry running.

Problems It Solves

What Goes Wrong Without It

Worn housings get scrappedBoring the housing out and fitting a bushing restores it instead.
The bore closes on pressingAn interference fit into the housing shrinks the bore; if that is not allowed for, the shaft binds.
Dry running is not allowedWhere oil would contaminate the product, an engineering plastic bushing runs without it.

Application Scenarios

Where It Is Used

Carrying a shaft or pivot pin in a machine frame
Lining a housing bore so a worn assembly can be refurbished
Acting as a guide bush on a production fixture or an inspection jig
Running dry where lubrication is not allowed, using an engineering plastic

Who It Is For

Who Specifies It

Maintenance and design engineers replacing worn bearing surfaces, and fixture builders who need guide bushes made to a specific bore.

Related Capability

Technical Features

How It Is Made

ProcessCNC turning, with a finishing pass on the bore where the drawing requires
GeometryPlain or flanged, chamfered ends, with grooves, cross holes or lubrication features to drawing
MaterialStainless steel as shown; aluminium alloy and engineering plastic to the same print
FinishTo the bore finish called out on the drawing

Specifications

Specification Table

Bore diameter	To drawing
Outside diameter and housing fit	To drawing
Length	To drawing
Bore tolerance	Confirmed per project against your print
Bore finish	To drawing
Material	Stainless steel, aluminium alloy or engineering plastic
Flange	To drawing where required
Minimum order	Confirmed per project

Values marked to drawing or confirmed per project are set against your print at quotation. No certification, capacity or tolerance figures are published because none were published by the business.

Comparison

How It Compares

Against a rolling-element bearing, a plain bushing is cheaper, tolerates shock and contamination better and takes less radial space, but it has more friction and needs a good shaft. Against running a shaft directly in the housing, it moves the wear into a part you can replace.

Use Guide

Check the housing bore before pressing; the interference is what it is against the actual bore, not the nominal.
Press squarely with a proper mandrel, not by hammering on the flange.
Re-check the bore after pressing if the drawing calls for a close running fit.
Replace bushings in pairs where two carry the same shaft, so the alignment stays true.

Questions

Questions About The Precision Bushing

Should I give you the finished bore or the pre-finish bore?

Say which you mean on the drawing. If the bushing is an interference fit in the housing, state whether the bore dimension applies before or after pressing, because the two are not the same.

Can you make bushings to fit a housing I have already bored?

Yes. Measure the housing bore and send the measurement with the print, and the outside diameter will be machined to the fit you want against that actual size.

Which material for a food or washdown line?

Stainless steel is the usual answer for washdown. Where lubrication is not permitted, an engineering plastic bushing running dry may suit better. The duty decides it.

Can you make a flanged version of an existing plain bushing?

Yes. Adding a flange is a drawing change, not a new part family. Give the flange diameter, thickness and which end it goes on.

Often Quoted Alongside

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A turned ring that joins two tube or housing sections and holds them concentric while the assembly is fastened.

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Precision Shaft

A turned and finished shaft that runs in a bearing or a bushing and holds its diameter along the whole working length.

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Machined aluminium saddle tube clamp with a curved seat and four counterbored fixing holes

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Aluminium Tube Clamp Saddle Type

A curved saddle block that clamps a round tube down onto a flat surface with four fasteners.

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Engineering Notes

Machined locating and clamping components of the type used to build production fixtures

How to Specify a Production Fixture

What a fixture supplier actually needs from you and the four decisions that set the cost.

Read The Note

Precision turned components of the kind used as references in inspection jigs

Inspection Jig Design Basics

How to build a check fixture that gives the same answer regardless of who is using it.

Read The Note

Quote The Precision Bushing

Send the drawing with tolerances, the material and the quantity. Say what the part fits against and any tolerance that is doing no work will be flagged before it is priced.

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