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This might give some insight into the different methods

Yep - see post #65 For now though, I am just using it as is. When I get bored, I might do some more testing. I wonder if the amount of times I have removed and changed the bits is adding wear onto the spindle? :rolleyes::rolleyes:

I purchased a stainless steel rod off ebay for a few quid. It's perfectly true as I tested it on my lathe.

Ideally I want no wobble, but this was ridiculous. When the drill bit approached the work it would make the whole lot vibrate. I've got it to a level I am happy with now .. I think. Whilst I mostly do woodwork, I do drill metal every now and then, and with the amount of wobble I was...

Then you haven't read it properly :) The 0.1 - 0.2mm was measured at the jaws of the chuck. At the bottom of the rod (or drill bit) it was measuring 1mm of wobble, which is bad even for woodworking. And as was mentioned, the rod being used to measure was perfectly straight. I also tried several...

I'm surprised banggood hasn't come up with a cheaper alternative, ...perhaps maybe they are just really expensive to make? I can't justify spending £60 for two as it's only for a jig, so I guess I will have to settle for a DTI base I assumed they were all the same size, but the one I linked as...

Has anyone found a reasonably priced source for these in the UK? I know you can get the DTI bases which are pretty good, but they're not quite a compact.

How would the couriers know what you have ordered? that would be disclosing private information. At best they can tell you who its from and maybe provide an order number you can reference with the original seller

What infuriates me so much about the whole situation is that we could change our habits in a very short period of time, but we don't, because that affects profits. - Why can't we completely remove cheap meat? why do we think we have the right to eat meat every single day? meat should cost as...

Ok, so new chuck has arrived (replacement from Axminster) and when used with the existing arbor (the one that came with the second replacement), I get about 0.2mm runout (measured at the point where the jaws clamp onto the rod). When used with the arbor that came with the cheap scroll chuck, I...

probably more accurate, yes That would be great if they did. I have heard they do that in some cases, but I suspect only if it's local and probably for more expensive stuff too

Axminster have agreed to send me another chuck to try ... third time lucky? :( Also, for what its worth, despite me being really disappointed with this drill press, I can't fault Axminster Customer service. (y)(y)

The arbor only has two positions. The problem is that there is always going to be error as nothing is ever going to be perfect. So sure I can measure as you say, but that doesn't tell me its the root of the problem

It's really quite difficult to measure the arbor as the changes are so small, for the most part <0.01mm (less than half a thou), my DTI only has 0.01mm increments, so even if I do try to measure between those increments, I'm not sure if they can be trusted? That's always going to be the case...

So, back with some results - When testing the arbor only (no chuck connected), I get 0.005mm for the one orientation, and about 0.01mm for the other - When testing the chuck with a straight rod inserted and measured about 10mm from the chuck jaws, for 4 orientations, 90 degrees apart, I get...

I'll try this. I do actually have a lathe, but its MT2 not MT3. How would testing between centers help? as aren't you then introducing error from the tail stock?

As I mentioned in an earlier post, they replaced the chuck with this one Axminster Workshop 16mm Keyless Chuck But I am still getting the same issues. Can you post a link to the type of high quality Jacobs chucks you're referring to?

Yes, it would be ideal to have a test bar, but at £50, and something I would only use once, probably not something I'll invest in. This is the sort of scenario when you need to know a mate you borrow this stuff off :D...

Interesting. Looking at some of the most expensive Rohm chucks (£100 +) on Cromwell state "High concentricity of up to 0.15 mm" Not entirely sure where they're measuring that though