[modeleng] Boring Bearings
- From: "shep" <shep.28@xxxxxxxxxxxx>
- To: "Modeleng" <modeleng@xxxxxxxxxxxxx>
- Date: Fri, 9 Sep 2005 11:48:13 +0100
Hi Al!
Thanks for your reply.
I wish that I had the Atlas attachment! In the meantime, I have decided to
test the following method of boring the headstock:
I will machine the material for the headstock into an accurate cube. I will
then mark out the cube with the centre points, using a height gauge and surface
table. I have produced an accurate vice, where the two jaw clamp directly
onto the bed of my milling machine, thus providing data points in two
dimensions. I then propose to drill the headstock from each side, using the
marked centre points as references, and bore out to the size of the outer
bearing with a boring head. The same head will machine the shoulder to
restrain the sideways position of the bearing. The headstock will fit onto
the vee ways of the bed, and this should give me the opportunity of 'skewing'
the headstock slightly, until it turns a perfect parallel. Not the most
elegant solution, but it may work in practice!
That is the theory, which I will check out on some scrap metal.
This is an interesting project for an old 'codger' aged 77, as it is
'stretching' me and forcing me to learn new skills. It is fortunate that
there is no time factor involved, so it may go on for months, ?years!
I have cut about a third of the changewheels, but have abandoned gear cutting,
as my son-in-law, who is an electronic engineer, has suggested electronic
control of the leadscrew! I have no ideas on this subject, as electronics
are a black art to me!
Cheers! Hubert
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