Member postings for bernard towers

Been screwcutting I’m my S7 for more than 30 years and have never had a problem. The great thing with the S7 is the mainshaft locking pin enabling the chuck to be well tightened. Also when you consider that the forces for screwcutting are much lighter than for normal turning operatios

As my case hardening is all small parts sub 3 mm I have always had great success with box hardening. The parts come out pristine and a beautiful grey all over

Brings new meaning to the word mate!

I’d have to go for Valve Thread.

My Chief has a kicker similar to that but according to the Indian spares people they should be made from a ductile iron mine is, it’s supposed to withstand shocks better and lets face it hard or soft you are never going to wear it out. Plus one for fabrication. Starter ring gears are soft and they last ok.

Edited By bernard towers on 27/01/2022 22:36:51

Looks horribly like a section used on double / triple footway covers to bridge the gap between lids. I still have a little.

Andrew you can do it without grinding just be very careful and get a good surface finish finally finishing with polishing paper. Mine has been running for 6 or seven years now with no trouble except changing the bronze idlers for sheet tufnol ones. Oh and my super 7 has a dro fitted.

Some nice images on google and cutaways looks like prv in reverse

Sorry Harry but it’s a sign of the times you do have a choice of course

Heat your chilled Castings to red heat and hold for several mins then wrap in insulation to slow the cooling process.should be ok after that.

Most people have come to accept that as the norm, I for one don’t.

Try your local model engineering club ,they may have a contact. On the other hand you could ask Noel!!

I thought that the idea was to have one organisation doing things once not two organisations doing things twice . And a much more sensible idea as filling posts in these organisations seems to be getting more difficult.

Surely it’s not the southern fed anymore but the federation of model engineers

3/16 ball ended carbide mill for me

Edited By bernard towers on 22/01/2022 19:08:23

Spray with corrosion inhibitor (not wd40)and seal in polythene bags.

I used to use Binomags for years I think they were ex WD and really good but had a set of optivisors bought me (lucky me) with two sets of lenses and they are fantastic. Beautifully clear and loads of room for your specs under them.

I’d have to go with Andy G don’t think it’s likely to be CZ121. You can get curls with some tools on CZ120.

Bored a redwing casting for someone who only has small machinery.

sorry Clive but clockmaker fits fall way short of good engineering and toolmaker fits. i say this from the viewpoint of having made two coaxial finders and the fit of the parts has to be a minimum of reamed holes and polished shafts? plungers. short article for MEW awaiting printing.