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Steel Shaft, 30 mm: Round Bar Turned Between Centres
A shaft carries gears, wheels and bearings, and it has to be straight, round and true to size where they fit. Turned between centres from a forged round bar, it can be taken out, checked and put back without losing its axis.
The picture: a steel bar being turned between centres, driven by a lathe dog.
Intermediate
An afternoon
Instructions
1
1
Cut the bar
Cut the bar
Saw a length of round bar a few millimetres oversize in diameter (about 33 mm for a 30 mm shaft) and a little longer than the finished shaft.
Materials for this step:
Mild Steel Round Bar1 pieceTools needed:
Hacksaw2
2
Mount it between centres
Mount it between centres
Face both ends, centre-drill them and mount the bar between centres, driven by a lathe dog, as in Turning Between Centres.
3
3
Turn to 30 mm
Turn to 30 mm
Rough down to about 30.5 mm with light oiled cuts, then take a fine finishing cut to 30.00 mm, measuring with a micrometer at both ends and the middle. Turn the dog to the other end and finish the length under it.
Tools needed:
Metal Lathe
Turning Tool Set HSS
Cutting Oil
Micrometer
Safety Glasses4
4
Check it runs true
Check it runs true
With the shaft back between centres, run a dial indicator along it. Break the sharp corners at the ends.
Tools needed:
Dial IndicatorMetal LatheMaterials
1- 1 piecePlaceholder
Tools Required
7- Placeholder
- Placeholder
- Placeholder
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