Member postings for Bernard Start

Hi All for those of you interested in mounting a QCTP type 250-111 there is an excellent youTube

posted by WBR Works "Lathe Rebuild Pt2" from 3:36 to6:18

Regards to all Bernard Start

Sorry David I'm not sure if I have joined the correct topic.

My comment is directed at your HBM 250-550 lathe.

I see in other videos the 250-111 QCTP fitted to this lathe.

Can you tell me how this is done with the existing post on the HBM top slide?

Regards Bernard

Very interesting!

I have a AMABL250Fx550 Aka Wiess WBL250F.

I see from the HBM Lathe rebuild Pt 3 YouTube that they have a QCTP 250-111 as does Precision Mathews but there is a boss on my 250 that prevents this.

Any ideas please to circumvent this obstacle?

Bernard

Not at all Dalboy. Sharing throws more light on the subject.

However, I have just managed to stretch a Mitutoyo 25-50mm to 52.04mm

Thanks Dalboy, I am belt & braces and my skill with gessing sticks in restricted space and internal diameters is poor.

I like to get measure three times, one independant before cutting.

There seems to be a reluctance to discuss and share actual dimensions. Do you know why?

Thank you Dalboy, I see from your classic work bench you have lots of experience!

I see you measured it. What was the register measure (5x.xxmm)?

Thank you Circlip, This machine is just off the production line and has not been used in anger to wear it.

I wish I had a go - nogo plug gauge or I'll be happy with the dimensions.

Hi Jason & Mike thank you for your latest posts. Especially Jason's photo.

I have enough ammunition now.

I want the exact dimension of the register so I can make a plug gauge to bore the hole in the new backplate.

I cannot keep stripping down the chuck to test it on the nose!

I find it extreemly funny (and anoying) that this basic dimension is not in the manual.

Hi Jason & Mike thank you for your latest posts. Especially Jason's photo.

I have enough ammunition now.

I want the exact dimension of the register so I can make a plug gauge to bore the hole in the new backplate.

I cannot keep stripping down the chuck to test it on the nose!

I find it extreemly funny (and anoying) that this basic dimension is not in the manual.

Hi Niel thank you for your interest.

The lathe is a Weiss WBL250F manufactured 11/2022

The spindle is basic 3 hole and not camloc. The spindle flange is : -

15mm thick

100mm diameter

52mm diameter register boss

8mm register boss hieght

24.5mm spindle bore

3 M8 fixing studs on 75mm PCB

All with my guessing stick

I hope you are unbaffled

Thanks SOD your solution is on hold for the worst senario even with a BP. In the meantime I try to do the best.

I am sorry I think I may have caused some confusion here.

The EC32 Collet chuck I have has a 72mm register rebate on rear and cannot be offered to mate with the spindle which has a 52mm boss register. Hence the back plate and the need for accuracy.

I will not be happy with any solution that involves drilling, reaming and pining the spindle face in situ.

Jason you hit the nail!

Thank you Mike. I do indeed mean ER32. I should know I own one already. It has spent the last 10 years on my ML7 which is being replaced by a Weiss WBL250F

I just want to put it on my new 250 and need a new FP which I hope to make as good as I can.

Gentelmen thank you for your interest and help.

The title was FP (Face Plate) for Wiess 250 (Chinese) look-alike Warco WM250.

I am searching for a simple drawing of the spindle face (nose) showing register and stud PCB dimensions with tolerances. The UK dealers Warco and Amadeal have no stock.

This I am sure you know this is so critical to get minimum run out so I do not want to rely on my guessing stick.

HI I am Bernard Start in Corbridge.

I am preparing to make a backplate for a EC32 collet chuck.

I have measured the spindle face with a caliper and find register 51.96mm and 65.20mm btween 3 studs or 75.20 PCD (Pitch Circle Diameter)

I would apreachiate guidance to more accurate measurments.

I would be happy to share a beer at my expense.