Member postings for Peter Hodkinson

Thanks Moderator -got a fix. Had to install Google Chrome instead of my favourite DuckDuck Go browser.

All is well I needed access to MEW Nov18 to follow the 3D mod of Alibre.

Many Thanks I have been trying for weeks phoning the publishers who seem to think Pocket mags is the answer. They only go back 6 month(ish)

As a fully paid up member of MEW and ME for both print and digital, I can no longer acces back issue. When I log on and click on the tool bar for 'Magazine' all the covers of back issues are shown. When I click on these a message appear 'ERROR sorry we cannot process you request bod refferer' Can any body help. I am looking fo an article Nov 2018. Pocket mags dont go back this far.

Help Peter Hodkinson

Maurice. This might help. I have a copy of the DORMER Technical Handbook, purchased from Greenwoods at the Harrogate Exhb. The book contains vast amounts of information on all sorts of cutting tools. I would agree with one reply the quality of the dies is crucial. I purchased a set of ME dies from a recognised trader and they are poor quality HSS.Some of the dies are OK but several have faults as follows

1) the two dimples set at 90 deg for closing down the die are not in the same plane so when adjusted twist the die and consequently thin the threads.

2) The split in the dies are not symetrical ie the 90 deg 'V' is off centre or not at perpendiculr to the two faces

3) The lead angle on the dies is not sufficient.

DORMERS advise that and appropriate chamfer is applied to the bar to be threaded to form a centralising lead

Good quality dies to BS or similar standards should not be expanded as this causes rubbing.

You might find ( if the dies are of good quality the the lead chamfer is different on one face to the other If so start with the greates lead. This is usually the face with the makers name on it.

Hope this helps

Peter

Many thanks to all of you who have considered my dilemma. I,m begging to think a dove tail column is a better option and perhaps the WARCo VM16 could be persauded to do what I want. Just a little worried about the elctronics and an unheated workshop.

Thanks again

Thanks to all so far who have mind to the problem. The tome Senior E is the same cast as the Rishton. The Rishton is a single base casting bored to tke the column and clamping is 'closing slot' 2/3 Cap Head screws close the slot and therfore clamp the column. The Tome Senior appears to be two cotter type clamps tighten the screws puls both halves of the cotters together and therfore clamp the column. This action forces the column against the vertical face of the bore, whereas the Riston by closing the gap the column could be forced in any direction when tightened. Swarf muck or bruising is a possibility of the bore - not easy to check given I would have to lift it out. Howerver I might slacken the screwws and give the column a spin and re check at 90 deg intervals.

Many thanks

Peter H

Hello to anybody interested in my problem. I have the chance to purchase a Rishton Metric Milling machine - little used with power feed on the table. I have checked the machine alignment very carefully and no problem with the X & Y. However when I checked the column with a prescion cyclindrical square I found the column to be leaning towards the front. The column is round has a vertical gib fitted and is of similar construction to the EMCO fb2. The cylindrcal square is 250 mm long and shows an error of 0.86mm over this length against the column to the table. The table is flat and free from any tool marks. Can this be corrected or is this normal. Any help would be gratefully recieved.

PS the Rishto Mill or the Tom Senior E are ideal for the work I want to undertake

Peter H

Thanks for all your help.

My next task is the aquire a Tom Senior E metric. This is because my ML10 and Cowell 90ME are metric and I have generally set my stall out to go with the flow. for those who have Dore Westbury MK1 machines I have now list on improvment or things to look out for. The most devious was the lower quill bearing. The bearing I believe should have been a press fit and or bearing lock adhesive. When I dismantled the quill to remove grease the bearing pushed out with nothing more than a light tap. Having recently re adjusted the bearing using the two large nuts I used Delta bearing lock and a noticable improvement was made.

Thanks again

Thanks for the replies.

My DW MK1 is in pretty good condition. and slide ways are well adjusted. I have recently overhauled the machine which made a great improvement. For general face cutting I use SOMTA fine rippers and then I replace the cutter with a standard DORMER end mill. With 1mm of end cut 'full width' vibration and deflection appear abnormal. I have wondered if the column is not stiff enough. The head bearing are adjusted correctly and lubricated using a medium gear oil. As regards the proverbial spline issues I have fitted an adjustable gib to the bronze drive section which again has made improvements to the DW. I tend not to use cutting emulsion but do use a Lubrisil neat cutting oil. I'm glad to hear the the Tom Senior E is more rigid. I have read odd notes with regard to not exceed 1/3 the cutter dia with and no more the 25% of the dia in depth. This I would be happy with at 16mm dia. Cutter range 6mm to 16mm speed 300 to 700 nominal

Am I expecting too much?

Thanks for all your help.

Edited By Peter Hodkinson on 07/02/2013 13:34:33

I'm thinking of purchasing a Tom Senior E to replace my Dore Westbury MK1 which works well but is limited in metal removal. The Tom Senior fits the space I have available and would live in an unheated garage/workshop. I would like to know as a ref what a 16mm cutter mounted in a 2MT ER25 collet chuck could be expected to remove in unleaded mild steel. The electronics of the ready availble alternative worries me with the wide change in temp and humidity in my workshop. Any help or comment would be appreciated even warnings

Phody

Edited By Peter Hodkinson on 06/02/2013 19:51:08

Edited By David Clark 1 on 13/09/2010 08:31:35