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Steel Shaft, 30 mm: Round Bar Turned Between Centres
Martin

Dicipta oleh

Martin

14. Oktober 2026NO
20
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0
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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.
Pertengahan
An afternoon

Arahan

1

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.

Bahan untuk langkah ini:

Bar bulat keluli lembutBar bulat keluli lembut1 keping

Alatan diperlukan:

Gergaji BesiGergaji Besi
2

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

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.

Alatan diperlukan:

Mesin Pelarik LogamMesin Pelarik Logam
Set pahat larik keluli laju tinggiSet pahat larik keluli laju tinggi
Minyak pemotongMinyak pemotong
MikrometerMikrometer
Cermin mata keselamatanCermin mata keselamatan
4

Check it runs true

With the shaft back between centres, run a dial indicator along it. Break the sharp corners at the ends.

Alatan diperlukan:

Tolok DailTolok Dail
Mesin Pelarik LogamMesin Pelarik Logam

Bahan

1

Alatan Diperlukan

7

CC0 Domain Awam

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