M. Georges Savoie must be feeding his hens something special then:

https://www.georgessavoie.com/en/store/collets-zugspannzangen-2/product-1.html

.

Very nice too, Stuart

… and having viewed the rest of your Album, I will now rewind to 2011

MichaelG.

I just love the image of a hen putting in her false teeth in the morning before she tackles something a bit tough! To be honest, I thought the fact that it took me several sessions on the Internet to find one supplier with a handful of second hand P9 collets qualified them as "rare as hen's' teeth" but no matter.

i'm in the process of rebuilding a pair of Hauser mills which came to me as a box of bits, essentially. I'll post some photos when I've done some painting but I think I can make one good one at least from the bits. What I am missing are the threaded end stops which regulate the movement of the laver action y slide. Seems to be just some threaded rod but measuring the bore of the slide end plate gives me 7mm with a .75 mm pitch thread so I assume that will correspond to an M8 x 0.75 thread. I've been looking all over for a supplier of this 8mm extra fine but can't find any. Lots of 8mm by 1.25 and 1.0 but no 0.75. A few suppliers list nuts this size but no threaded rod. Can anyone else with a Hauser mill confirm this is the thread and point me to a source or is this also "rare as hen's teeth?

Sandy

Shame that it's not P10 you're looking for Sandy as I have several dozen of those.

Apologies for the delay in getting back to thank people for responding but I wanted to get my thread gauge out and check things very carefully.

thanks for taking the time Stuart to measure all those threads. It's all tucked away for future use. The one that I can't make fit is the slide end stop which on yours is M8 x 0.5.but on mine fits better with M8 x 0.75 with my thread gauge. I can't find any studding that size or a bolt to try it but if all else fails I'll get a tap from Tracy. It's great that they have all these taps so thanks for that pointer.

Pete- thanks for thinking of me and a shame that yours are P10 rather than P9 – what uses a P10 collet?

I had a quick look at the French Savoie site where I got a couple of collets- it looks as though he no longer sells to the UK – BREXIT presumably.

thanks again to everyone Sandy

Cracked it! I was looking online last night for M8 x 0.75 bolts or something cheap to confirm that the end stop thread on my Hauser mill really was as I had measured and I kept getting ads for a small chuck to fit on the spindle of a Dremel or similar grinder. Off I went and after unscrewing the nose collet closer I had a perfect M8 x 0.75 threaded spindle which is a perfect fit for my end stops. I can only assume that Hauser used different threads in different models or different dates to explain the difference between mine and Stuart's. I also managed to finally find one supplier ba-bolts.co.uk who supply the appropriate threaded rod.

thanks to everyone for the help.

sandy

I posted details of the threads on my Hauser mill to assist Greensands and Alexandraeo Smith 1. Oily Rags contribution may have caused confusion. Hauser used different threads on their machines; the thread on the endstops of my circular table and slides are different. The following will explain why Alexander's purchased rod fits.

Prior to the eighteenth century screw threads for fasteners were mostly cut by hand but increasing demands deemed it necessary for them to be factory made. The lack of thread standardisation made fastener interchangeability problematical.

To overcome these problems Joseph Whitworth collected sample screws from a large number of British workshops and in 1841 put forward two proposals:
1. The angle the thread flanks should be standardised at 55 degrees.
2. The number of threads per inch should be standardised for various diameters.
His proposals became standard practice in Britain in the 1860's, so that ‘a nut made in Glasgow would fit a bolt made in Manchester’.

In 1864 in America, William Sellers independently proposed another standard based upon a 60 degree thread form and various thread pitches for different diameters. This became adopted as the U.S. Standard and subsequently developed into the American Standard Coarse Series (NC) and the Fine Series (NF). The thread form had flat roots and crests that made the screw easier to make than the Whitworth standard that has rounded roots and crests.

Around the same time metric thread standards were being adopted in continental Europe with a number of different thread flank angles being adopted. For example the German Löwenherz had a thread flank angle of 53 degrees 8 minutes and the Swiss Thury thread an angle of 47.5 degrees. The standard international metric thread (ISO 68-1:1998) eventually evolved from German, French and Swiss metric standards based upon a 60 degree flank angle with flat crests and rounded roots. The main differences between the early European standards was the shape and truncation of root and crest.

Since the introduction of thread standards large manufacturing companies have not always complied. A notable example is the pre-WWII Morris Motors bolts having metric threads and Whitworth form hexagonal heads! My Schaublin 65 lathe feedscrews have a diameter of 6.5 mm., 1 mm. pitch and 55̊ flank angle, which meant that I had to make my own tap when replacing the worn nuts. Therefore, when repairing or restoring old equipment it is essential to measure diameter and pitch of threads as well as examining their form. If the thread conforms, within tolerances to a standard then commercially available taps and dies can be utilised. I have posted a photograph comparing the Hauser thread to a ISO M8 x 0.75 mm. tap. This shows the threads to be similar within tolerance limits. I stated the Hauser threads in my post as standard ISO metric threads.

I have posted a photo of a relevant page in the English edition of the contemporary Hauser catalogue. These machines accommodated 10 mm diameter collets (0.393" = 9.98 mm.). The spindle on Greensands’, Alexander Smith I’s and mine, having a 9 mm. spindle were specially made for Woolwich Arsenal. I originally thought that I would make a new spindle for my machine so that I could use my extensive collection of Schaublin 10 mm collets but have now decided to bore out the Hauser spindle to 10 mm. If the spindle is made of case-hardened steel then the final finishing of the bore should not be too difficult to lap to the desired accuracy of concentricity and runout.

Wishing everone a quiet, safe and contented Christmas,

SH

Dear Greensands,

Thank you for posting a photo of your makers plate. It shows that your machine is not a Woolwich cast off and that Hauser produced 9 mm. spindles for other buyers. The same supplier sold the machine depicted on the Lathes.co.uk website. Is it yours?

The photo shows the 9mm ER11 collet holder that I have made and used succesfully. I used the 30 degree cone to centre the collet rather than the body.

Great to see the photos and the info that some of these machines were designed specifically for Woolwich Arsenal. The two that I was given both came from Ferranti's in Manchester and may have been engaged on War work as while both have the Hauser badge (one brass and the other more a chrome appearance) one has a MOD badge as well. I assume they both came from the same batch as all the individual castings are numbered (one no 10 and the other No 11). As you can see, they were in pretty poor condition when I got them with one more or less complete and the other missing the milling carriage (I've since found some of it) so I need to do some extensive repainting and fettling. Fun project if we have a new lockdown!

Can I suggest to the moderator that it might be a good idea to rename this thread to "Hauser mill" as info one these machines is difficult to find and a better title would make life easier for someone doing a search.