Member postings for ega

"So is copper worse than other metals in this respect?"

Can't be pulled out with a magnet?

Posted by Clive Hartland on 10/08/2017 09:16:23:

"With regard to the small Cherry plums, here they are known as, 'Bullis'."

Here in Kent they would be Bullace, I think

I seem to remember that the Austin Seven had this arrangement on its halfshafts.

Either type of key seat can be machined on a vertical mill but the straight key way would perhaps be more difficult on a horizontal mill.

Woodruff keys and cutters are readily made in the amateur workshop.

I assume that model makers would aim for authenticity of key type.

PS Excellent illustration, Ignatz!

Edited By ega on 10/08/2017 11:02:24

Thank you. I see they are now 3D printing brain cells!

+ 1 for No Logo just marked “1548-16130”

I also have a 5" 4 jaw by Bison marked 4304 - 125 which, unlike the light pattern Pratt Burnerd item, needed a backplate but is made so as to allow the backplate to sit partly within the chuck body with the result that the chuck projects only half an inch more than the PB.

Bill Wood 2:

"What is JAR's name and what is the book called please ?"

Sorry if I assumed too much.

JAR is/was the late Jack Radford, a frequent albeit under-appreciated contributor to ME (Model Engineer). His book, Improvements and Accessories for your Lathe (TEE Publishing 1998) is a compilation of his c 1970s articles based on the Super 7 lathe. Much has changed since then but the book is still worth reading (or turn up the articles if available).

The relevant article is Stop Bars and Bushes for Lathe Mandrels.

OT: I sometimes wonder whether an in-forum glossary of accepted abbreviations would be helpful; I am still trying to fathom Neil's "PLA" - one of the most common TLAs but not the Port of London Authority!

Edited By ega on 08/08/2017 14:30:59

Alan Charleston:

As I said, I don't know the Boxford and would add that I have no wish to alarm you. The two pins on the Myford are handed and it should be possible to determine which goes where by inspection.

Good luck with your project!

Further to Robbo's post about the corresponding arrangement on the Super 7, I think I heard somewhere that it is important not to inadvertently swap the clamp pins ("thrust pads" in Myford speak) side for side as this may lead to it being difficult or impossible to remove the topslide.

I don't know if this applies to the Boxford.

If doing this job I would grip the studding in the chuck (preferably collet) and support the tail end in a bush. JAR described a way of doing this in his book. This photo shows the tool in use:

Please ignore the nut on the studding which was there as part of a temporary drawbar.

"the presenter is a bit too silly for my tastes"

Greg Wallace lost my interest when he went round the Brompton factory, hence my thanks for the pointer to something I would not otherwise have watched. His partner, who did the machining segment under discussion, seems competent at what she does bearing in mind that the programme is aimed at a general audience.

I wonder if Alan (the one-man band) ever goes off and leaves the CNC mill to get on on its own?

Stuart Bridger:

Excellent spot! Significant that it needs just one man to do this.

clogs:

Did you try O'Keeffe's Working Hands?

Silver steel would not be my choice but if it were I would want to screwcut the thread.

Am I right in thinking that silver steel would wear better than mild or tool steel?

I am awaiting with interest the experts' views on this as I have had rather similar problems: the ELCB trips when the workshop fluorescent lights are switched on, a problem which was apparently cured by changing the starter in one of the units.

Tim Stevens:

Thanks for the clarification. I was actually thinking of the (maximum) number of tools the post will hold. That said, I don't own the Myford device and am interested to learn that it indexes eight positions as opposed to the four that my GHT version provides.

Robbo:

Aren't those screws for the fourway ratchet?

I have put some photos of a friend's Grubb in my album in case anyone is interested; it seems from the seat tube transfer to have plain gauge 531.

My own classic road bike is a Tommy Godwin which has been refinished with TG transfers but no tube ID.

Neil Wyatt:

Glad to know that you are also a cyclist; I think I already knew about Mike's trike, no doubt the source of the 531 offcuts!

Tony Oliver's "Touring Bikes" is very good on the subject of frame tubing generally and includes dimensioned cross-sectional drawings of the 700 and 708 tubes and profiles of single, double, triple and taper-butted tubes.

Henry Buckeldee:

I figured out that NDT is non-destructive testing but by "A previous owner I assume has stuck a Reynolds 531 butted tubing on" did you mean a transfer or a tube?

My impression is that in the classic period the Reynolds transfers were not readily available to owners; today it seems that just about anything can be sourced on the internet.

Good to hear from a cycle enthusiast. How about a picture of the machine?

Thank you for this reassurance.

My radial arm saw has a thermal cutout which has operated only once in all the years I've had it. A cutout seems like a good idea for any continuous running motor.