Member postings for JohnF

Niall exactly right, grind off the tooth on jaw 2 and the remains of the one on jaw 4 also make sure there is no remnants of the broken off jaws on 1 & 3 it should then work OK but as you are aware with reduced capacity.

No looked but try Rotagrip for spare jaws.

John

Welcome David, good luck with your Boxford refurb, a couple of links here that may be useful, Boxford spares & Boxford user group - it mat be worth asking the group for any info you need as well as on here. Also consider contacting Boxford and ask if they can provide you with a drawing of the half nuts, I have found the spares department very helpful.

**LINK**

**LINK**

Broken teeth, its worth drilling and tapping to insert some screws on each broken tooth then brazing, if you know anyone with Eutectic metal spraying facilities that works very well. To file cut the new teeth first make a template from sheet metal using another part of the gear then place it over you new teeth as a guide - obviously cut enough teeth on your template to allow alignment for the new teeth.

Hope this helps a little

John

Here's one I got unexpectedly on Ebay for an absolute song quite a few years back, being 1-2" its use is limited but fairly recently I made a GO plug gauge for Myford spindle thread using 3 wire method -- long story as to why I needed this even of accuracy but its a useful tool to have. We used them regularly when I worked in industry.

Thanks Joe I bought it new in 1984 always been very please with it and its a very versatile machine -- great for small parts but surprising what its capable of as well.

John

Looks the same at the one I use on Newal 2436 jig borer they were made by OMT [Optical Measuring Tools] part of the Newal group. The one i used was unfortunately not the best tool in the shop, eventually went over to Wohlhaupta and Kaiser boring heads however we were looking for tenths not thous !

John

John Hinckley this is how i balanced the wheel for my Christen drill grinder an impromptu method but it worked well providing you make sure the thin parallels are level to mother earth. Regarding the finish -- have you checked the spindle bearings ? Had a similar problem and it was the bearing causing the problem

At this time of year it’s most likely to be a male of the species and since Peter says it was a brown colour , assuming it is the bird he’s heard, I would go for Thrush, either a Song Thrush or the larger Missile Thrush, both sing loudly but have sweater song than Blackbird.

However the bird Peter saw could have been a hen Blackbird attracted by the male singing ?

John

Greensands try dampening your finger, lick it ! then try the button, I have found this seems to work when having similar problems. I have no idea how the touch technology works but this works for me

John

Lathe-argic, It would be worthwhile adding some details about your Super 7 these machines have been around since the 1950's and there are several marks with mods done on various parts of the machines.

I appears your has a gearbox, does it have power cross feed ? probably posting a photo or two in your albums would help member identify the most likely area of age or you could look on the Myford site and with you machine number you can tell when it was made.

The method of lead screw removal varies depending on the model and you need to do this to strip down the saddle/apron.

John

Here is a link to a Super 7 Manual PDF file **LINK**

https://groups.io/g/myfordlathes/files/Super%207/Super%207%20manual.pdf

John

Michael, try these , no experience with Nexchem also look up Walsall chemicals they manufacture metal treatment salts which do contain said compound, I have used these folk for supplies. There is another one in Brum that supplied the gun trade— name escapes me right now but if the memory bank opens I’ll PM you

John

**LINK**

Hmm! interesting, my nephew is a paediatrician and speaking with him some time back about why there are so many people [children in particular] now with allergies - it seems to me there were far fewer when I was young, indeed I don't recall anyone I knew having an allergy -- his reply was that we live in a world that is too clinically clean thus our immune system has little or nothing to do so looks for something it perceives is a threat and attacks it. Somewhat simplistic explanation on my part but I'm sure you will get the idea !

John

Matthew I think you need to look at this link by Neil to see how to post photo's **LINK**

John

Ian, when you have gone to the trouble of setting up your lathe to screw cut the thread why not just cut it to size and you will have a better more accurate thread than finishing with a die ! Measure it with wires or a thread mic if you have one or use the mating part as a gauge.

John

Hello all and apologies for the late reply but I have been absorbed in another project ! Looks like the bookbinders press is the answer -- pity my mother was not around, she was a Bookbinder & printer at a local firm !

I will pass the info to my friend Allan. Thanks again to all

John

On Amazon it says the supplier is H S Walsh which a well respected supplier of jewellery & clock makers supplies so one would expect them to be genuine Vallorbe / Grobert files -- strangely the H S Walsh web site will not open ? maybe the times we are in.

John

A possibility Rod, thanks I will ask my pal if his Dad was involved such activity. It's strange that it has two clamping systems, one in between the wood then the metal clamps mounted on top !

Vallorbe are possibly the best around, not cheap but they do last extremely well, I have also used Bacho and they are not bad. Not tried Ketan's at Arc yet but intend to do so next time I need some. Most of my work is in tool steels, SS, gauge plate etc.

John

Hi not engineering and have posted on the sister woodwork forum but a pal has been clearing out his Dad's workshop, he was a woodworker/DIY chap and he came across the item below, asked me did I know what it was for -- no idea ! So wondering if the team has any input ??

It is about 20" long and the two timber parts are 2.5" square, it seems to be commercially made rather than home made. It may of course have nothing at all to do with woodwork but ????

Thanks in advance.

John

Mark, I was taught this method as an apprentice in the early 1960's having been asked many time how to I typed this up same years back. You may fined it useful : --

John

Screwcutting Metric / Imperial August 2010 This was passed to me by my apprenticeship mentor in the early 1960’s When screw cutting a metic thread on an imperial lathe you can use the chaser dial and disconnect the half nuts when cutting up to a shoulder by doing the following : -

First make sure you engage the half nuts with the chasing dial on a particular number — number 1 is best

Then make your first cut and at the end of the cut disengage the half nuts and stop the lathe asap now retract your tool exactly as you would if it was an imperial thread — DO NOT move the carriage — this is very important.

Now the thread dial will have passed number 1 so start the lathe in reverse and re-engage the half nuts on number 1 and run it back to the start point of the thread.

No need to disengage here just stop the lathe, apply the second cut and start the lathe forward then repeat the above at the end of the cut.

This allows you to thread up to a shoulder or undercut without fear of a disaster !

Link to an excellent video demonstrating this method from the ME forum March 2019

https://youtu.be/HXt4TWa382Q

Some of my free hand ground threading tools

Edited By JohnF on 10/05/2020 07:30:06