14.0mm to 14.1mm id required on a peice of ali

This topic has 18 replies, 12 voices, and was last updated 23 February 2026 at 22:42 by Nigel Graham 2.

Viewing 19 posts - 1 through 19 (of 19 total)

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18 February 2026 at 21:43 #838331
mgbglasgow
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@mgbglasgow
Hi from glasgow

anyone open to small peice of lathe work required in Glasgow?!?
Advert

19 February 2026 at 16:22 #838500
bernard towers
Participant
@bernardtowers37738
Go on tell us more
19 February 2026 at 16:26 #838502
mgbglasgow
Participant
@mgbglasgow
It’s an anodised collar either internal bore of 14.0mm , need it out to 14.1n mm
19 February 2026 at 17:25 #838506
DC31k
Participant
@dc31k
1/2″ (maybe 10mm) wooden dowel. Slit with a saw. Wrap with abrasive paper, end tucked into slit*. Spin in a cordless drill.

* it will very quickly become obvious in which direction the abrasive should be wrapped.
19 February 2026 at 20:49 #838549
bernard towers
Participant
@bernardtowers37738
Put in 14mm collet and take out 0.1mm
19 February 2026 at 21:31 #838553
Nigel Graham 2
Participant
@nigelgraham2
Anodising will blunt tools and cause a poor finish and possibly inaccurate size if you try to turn it: it is aluminium oxide, a substance itself used as an abrasive.

Lapping as Mgbglasgow suggests is probably the best method. I assume something is available – a mating part perhaps – to use a plug-gauge. Or make one, of course.
19 February 2026 at 23:49 #838569
mgbglasgow
Participant
@mgbglasgow
Seriously, is this the depth on here ?!?
19 February 2026 at 23:50 #838570
mgbglasgow
Participant
@mgbglasgow
Jesus
20 February 2026 at 07:16 #838586
JasonB
Moderator
@jasonb
Sorry wrong end of the country but post is often cheaper than fuel.

You will find a lot of answeres but often little in the way of offers.

I doubt it is hard anodised and even so anyone doing it can charge for a replacement tip if they feel it has blunted one. Personally I don’t seem to get the problem turning old bits of aluminium that have oxidised over time and as it is only skin deep a new insert for the finish cut will do.

I also don’t know how you would make a plug gauge if you don’t have the equipment to bore the part. Likewise if you are unable to bore it you are unlikely to have collets to put it in, even those magic ones at 14mm which will hold a part with a 14mm hole in them?

Length of bore and overall size would help so anyone offering will know if it will fit their machine. Also is it a clamp on collar that may have been split?
20 February 2026 at 07:27 #838588
Hollowpoint
Participant
@hollowpoint
The quality of answers is directly related to the quality of question. You’ve given us nothing.

What is it for? What shape is it? How long is the bore? How accurate does it need to be? Do you have a picture?

No one is likely to commit to helping without detail. An already round 20mm long spacer bush would take 10 minutes to bore to size. A 100mm deep bore going diagonally through on a rohmbic shaped space shuttle part still attached to the aircraft would take me over ten minutes.
20 February 2026 at 08:32 #838591
not done it yet
Participant
@notdoneityet
On 19 February 2026 at 23:49 mgbglasgow Said:

Seriously, is this the depth on here ?!?

Removing what might, or might not be, 0.1mm from an aluminium part is not a trivial matter with a lathe. Initial concentricity would require very careful set up.

Final,concentricity required is not established.

It is not a simple case of holding the part in a 3 jaw chuck.

Clearly, from your comments, you are not exactly helping yourself in getting this done accurately and (presumably?) cheaply.

I am with the suggestion that you do it yourself by lapping. An alternative would be a suggestion that you take it to an engineering company and ask them for a quote.

Bye.
20 February 2026 at 08:34 #838593
Nealeb
Participant
@nealeb
Or maybe ask the question in the “help requested” section rather than the “introduce yourself” area?
20 February 2026 at 09:22 #838599
DC31k
Participant
@dc31k
On 19 February 2026 at 20:49 bernard towers Said:

Put in 14mm collet and take out 0.1mm

How would something with a 14mm bore fit into a 14mm collet?

If, through some slight oversight on your part, you neglected to mention that it should be an internally-gripping (expanding) collet, how do then machine the part when the collet is gripping the surface to be machined?

Please read the question again and reconsider.
20 February 2026 at 09:24 #838601
DC31k
Participant
@dc31k
On 19 February 2026 at 23:49 mgbglasgow Said:

Seriously, is this the depth on here ?!?

You are the one who has specificed the depth. 0.1mm on diameter is a depth of 0.05mm. This is within the sensible range for abrasive methods and does not require turning, especially because of the surface coating.
20 February 2026 at 09:58 #838604
Jouke van der Veen
Participant
@joukevanderveen72935
It was a simple question to start with:

Is there somebody in Glasgow who is able to increase the internal hole in an anodized aluminium collar from 14.0 to 14.1mm.

It suggests that the collar does not fit on something with an external diameter larger than, lets say, 14.05mm. Perhaps the diameter of this part can be reduced a bit by abrasing?

Or the collar can be heated and then pressed on the counterpart?
21 February 2026 at 12:36 #838770
Michael Gilligan
Participant
@michaelgilligan61133
On 20 February 2026 at 09:24 DC31k Said:

On 19 February 2026 at 23:49 mgbglasgow Said:

Seriously, is this the depth on here ?!?

You are the one who has specificed the depth. 0.1mm on diameter is a depth of 0.05mm. This is within the sensible range for abrasive methods and does not require turning, especially because of the surface coating.

Spot-on, DC31k

a Delapena machine would be ideal, but abrasive on a dowel would soon get the job done.

MichaelG.
21 February 2026 at 12:58 #838776
Nicholas Farr
Participant
@nicholasfarr14254
Hi mgbglasgo, less of the sarcastic and possible offensive comments, may help others to help you.

Regards Nick.
23 February 2026 at 18:48 #839089
Trevor Drabble 1
Participant
@trevordrabble1
Hello mgb . Any chance of a couple of photos ?
23 February 2026 at 22:42 #839106
Nigel Graham 2
Participant
@nigelgraham2
Sorry – I mis-referenced my remark.

Lapping was Dc31k’s suggestion, not Mgb’s of course!

I still agree with the technique though.
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