Ground stainless steel precision shaft with a smooth cylindrical running surface.

Precision Turned Parts

Precision Shaft

Name: Precision Shaft
Brand: Yiwu Hongpin Mechanical Equipment Company

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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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 shaft is a simple part that is unforgiving to make. What matters is not the nominal diameter but how little that diameter varies along the length, how straight the axis is, and how smooth the running surface is where a bushing or a seal rides on it. Hongpin turns shafts to customer drawings in stainless steel and in aluminium alloy, with the running surface finished to the specification on the print.

Key Benefits

Why It Is Made This Way

Consistent diameter along the lengthA shaft that tapers runs tight at one end of its stroke and loose at the other.
Finished running surfaceSurface finish is what decides whether a bushing beds in or wears out.
Made to your printLength, diameter, end features, chamfers and any cross holes follow the drawing.
Matched to the bushingShaft and bushing can be quoted and made together so the running clearance is controlled as a pair.

Problems It Solves

What Goes Wrong Without It

Stock bar is not a shaftDrawn bar is not straight enough or round enough to run in a close bushing without work.
Diameter drifts along the lengthThe clearance changes through the stroke and the motion goes from free to stiff.
Rough surface eats the bushingA shaft finished too coarse acts like a file on a plain bearing.

Application Scenarios

Where It Is Used

Running in a plain bushing on a linear or rotary motion
Carrying a pulley, roller or lever arm on an assembly
Acting as a guide shaft on a production fixture
Serving as a pivot in a mechanism that has to stay free after many cycles

Who It Is For

Who Specifies It

Designers and maintenance engineers who need a replacement or a new shaft made to a drawing, particularly where the original part is obsolete.

Related Capability

Technical Features

How It Is Made

ProcessCNC turning, with grinding or a finishing pass where the drawing requires it
GeometryPlain or stepped, with chamfers, cross holes, flats, threads or circlip grooves to drawing
MaterialStainless steel as shown; aluminium alloy and engineering plastic to the same print
FinishTo the surface finish called out on the drawing

Specifications

Specification Table

Diameter	To drawing
Length	To drawing
Diameter tolerance	Confirmed per project against your print
Straightness and roundness	Confirmed per project against your print
Surface finish	To drawing
Material	Stainless steel, aluminium alloy or engineering plastic
End features	Chamfers, threads, flats, cross holes or grooves to drawing
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 buying hardened and ground linear shafting from a catalogue, a made-to-drawing shaft costs more per piece but carries your end features and your length, with no adaptor or secondary machining. Against a hollow tube it is stiffer in bending for the same outside diameter.

Use Guide

Handle and store shafts so the running surface is not nicked; a burr is worse than wear.
Check the shaft into its bushing dry before the assembly is built up.
Lubricate according to the bushing material, not the shaft material.
Replace a scored shaft rather than polishing it undersize.

Questions

Questions About The Precision Shaft

I do not have a drawing, only the worn shaft. Can you still make it?

Usually yes. A worn shaft can be measured and drawn, but the worn running surface has to be interpreted rather than copied, so tell us what it runs in and how it failed.

Can you hold a tolerance across a long length?

The achievable tolerance depends on the length-to-diameter ratio and the material, which is why it is confirmed per project rather than promised as a blanket figure.

Should the shaft or the bushing be the sacrificial part?

Normally the bushing, because it is cheaper and easier to replace. That points to a harder shaft and a softer bushing, which is worth agreeing before either is made.

Can you supply shaft and bushing as a matched pair?

Yes, and it is the better way to buy them. Running clearance is the difference between two dimensions, so controlling both together controls the clearance.

Often Quoted Alongside

Precision Turned Parts

Aluminium Connect Ring

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

View The Part

Precision Turned Parts

Precision Bushing

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

View The Part

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

Aluminium Clamping Components

Aluminium Tube Clamp Saddle Type

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

View The Part

Engineering Notes

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

A range of machined parts of the type quoted from customer drawings

What to Include in a Machining RFQ

The six items that let a supplier quote accurately and the one that usually sets the price.

Read The Note

Quote The Precision Shaft

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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