Type identification of a endmill tool holder (Hauser)

[Jon HolmesParticipant @jonholmes92873]

Stuart, if you are still reading these posts. I am interested in how you went with casting the endstops. I have some straight ones, so can copy but do not have any circular stops. Did the 3d printed patterns work well?

Jon

[Stuart HarrisonParticipant @stuartharrison30824]

Jon, the 3d printed endstops were a failure and so I am now about to cast in Admiralty bronze using a 3d printed pattern. If successful I will be able to cast for other users. I have now bored out my spindle to fit the W10 collets of my Schaublin 65 lathe. Will post photographs shortly. I am still unsure of how to mount the circular endstops on a faceplte to machine the bearing surface.

Stuart

[Jon HolmesParticipant @jonholmes92873]

Stuart, thanks for reply. I am lucky that my Hauser is a w10/P10 spindle. Yes, somehow holding those circular stops for machining is a problem. One of my thoughts was to drill and thread the hole for the stop itself (mine are M7x0.75 but I would consider changing to the more available M8x1.0) and then use that to attach the body of the stop onto a faceplate. Do you have a drawing of a circular stop?

Thanks, Jon

[Jon HolmesParticipant @jonholmes92873]

I noticed one of the brass bushings on an original stop had started to come out so I removed it. Interesting! The bush has 3 cuts in it to create a “tang”. Could this be a method to help lock the screw?

[Jon HolmesParticipant @jonholmes92873]

Well, it “only” took me about 24 hours to work out what the tang was for! Lucky I did not have to make any important decisions in that time with my lack of seeing the obvious!

The tang lines up with the locking screw which is on the side of the end stop and gets forced onto the thread of the stop.

[Howard LewisParticipant @howardlewis46836]

"Oddball" fasteners persisted into the 70s.

On the Bristol RE bus, (Using Unified fasteners ) the clutch was secured to the still Whitworth fastener Gardner engine by Imperial A/F hexagon bolts with a 5/16 BSW thread!

My Record vice is secured to the bench with non standard hexagon nuts, tapped with Unified threads.. very much the matter of using what happened to be available at the time .

Howard

[DiogenesIIParticipant @diogenesii]

Posted by Jon Holmes on 15/07/2022 07:51:43:

Well, it “only” took me about 24 hours to work out what the tang was for! Lucky I did not have to make any important decisions in that time with my lack of seeing the obvious!

The tang lines up with the locking screw which is on the side of the end stop and gets forced onto the thread of the stop.

It's a normal practice in all kinds of assemblies where a lock screw acts on the threads of another screw to provide a brass 'pad' to prevent deformation of the threads – sometimes a neat solution like this, on lesser machines it can be nothing more that a small disc, or slug, of brass.

Likewise a plain rod intended to be locked by a screw will often have a flat machined on it, so that any burrs will not cause it to bind in it's bore; if there is no flat, then a brass pad ought to be fitted.

Aluminium alloys are generally too soft – the pressure of the lockscrew often causes them to expand sideways and jam.

[Stuart HarrisonParticipant @stuartharrison30824]

Jon,

I have drawings and photographs of the circular stop as a .pdf file which I find difficult to post on this website. Please contact me.

SH

[Jon HolmesParticipant @jonholmes92873]

Stuart, did you get my message?

[Stuart HarrisonParticipant @stuartharrison30824]

Jon,

No, please send an e-mail to stuart@fionchra.co.uk

Stuart

[Author]

Posts