Member postings for Tony Pratt 1

Sorry to say I haven’t actually looked at it’s operation so my post may be a red herring

Tony

Again speaking of the 290v but the 250 will be similar, the parts diagram shows the feed gear attached to the end of the cross slide screw so I think if you do indeed over travel away from the operator the feed screw nut will hit the gear and lock up?

Tony

Hold on, so you were facing towards the middle & it jammed up, if your 250 is the same as my 290 if you travel the tool too far away from the operator doesn't the cross slide screw just come off the nut? Not sure if you have a DRO which might have jammed.

Tony

Mike, you are not actually measuring the spindle run out but a 'ground spindle held in an ER40 collet chuck, with a backplate screwed onto the spindle.' I suggest you remove the collet back plate & check for run out on the spindle outside register & internal taper, not sure about the ball race rotating at half spindle speed though.

Tony

Do you know what, the lathes are obviously copied from European models maybe Emco & the build quality is shocking in the extreme but they do cut metal & my Warco 290V also cuts parallel.

PS my inverted vee ways are not 90 degrees so not sure where they touch each other or what the angle is meant to be, they must rely on 'point' contact only!

Tony

Edited By Tony Pratt 1 on 20/06/2022 20:54:04

Chris you are quite right .0005" is neither here nor there but the guy asked a question. BTW even NASA & NPL should only use tight tolerances where appropriate.

Tony

Is it axial or radial run out?

Tony

I personally doubt a mechanical edge finder will repeat to .0002", in my book the most accurate method is to 'split the edge' with a DTI, & in reality .001" or under positional tolerance is jig boring territory.

Tony

Edited By Tony Pratt 1 on 20/06/2022 13:44:35

Edited By Tony Pratt 1 on 20/06/2022 13:53:16

You do not need to lubricate an edge finder, as said before it will attract dirt.

Tony

Same as Mike says, a bit hairy just be careful.

Tony

Unless our education system has changed which is possible UK students do not use a ‘bar’ on a 7 , but hey just for fun I occasionally do 😉

Tony

I would never buy anything via bank transfer.

Tony

That makes sense, also about 5 teeth damaged to various degrees.

Tony

Edited By Tony Pratt 1 on 06/06/2022 17:45:57

Hope you paid with credit card, Paypal or not as good a debit card? If so start making noises to the card provider.

Tony

Edited By Tony Pratt 1 on 06/06/2022 15:01:45

Sorry I missed we were only talking about metal cutting So, try a diamond segmented blade, the performance is streets ahead of discs for cutting stone but not cheap.

Tony

Iv'e watched a fair number of his videos & he seems fair enough in his tests, not sure if he is sponsored, that would be a big no no on his type of reviews.

Tony

Try a diamond segmented blade, the performance is streets ahead of discs but not cheap.

Tony

Is the OP buyer or seller? Either way unacceptable preparation for delivery

Tony

Try APT, good service & reasonable prices.

Tony

My experience with Paypal has been positive in the main, normally if goods don't turn up.

Tony