Shop Made Tools

[JRouche]

Little follower rest for a Hardinge lathe.

Very Nice! JR

[rjazz]

Been enjoying this thread for some time. Finally got something to add.

The world's most over-engineered grinder stand.

[BCRider]

Now... THAT... is....VERY SLICK! ! ! !

I can only imagine the head scratching that went into it and the happy face you made when you tried it out for the first time. I've been known to do a little jig of Victory at stuff that is half as nice.

[rjazz]

Thanks BC, ya spent many nights lying in bed, planning it out. Once I had the basics figured out, I am lucky enough to have a 3D CAD software with motion. I was able to build the whole thing with CAD, and work out the exact placements and dimensions, and not waste materials or time. Then I had a print to follow for each individual part, and things went together perfectly. The only glitch was, I originally planned on a counterweight on the back of the stand. After it was built with grinders on it, I quickly learned the amount of weight needed was not very practical, so had to rethink, and went with gas struts. But very happy with the results.

[BCRider]

Sounds like thinking and design time well spent. And deserving of even more kudos.

As the old line goes "I love it when a plan comes together"

[Cenedd]

My single one just slides out (sideways) on a shelf.....I feel quite inadequate now!

[ATW]

My take on a "Zero It" indicator holder:

The "kit" of parts for anyone interested in the finer details:

In action:


Over the cheap import indicol and C style holders the fine radial adjust and the vertical alignment make it a real pleasure to use, although one possible downside is with the indicator sitting flat clearance around clamps may be tight (as in the last photo).

[Cenedd]

ATW Very nice. I can't really see from the pictures how the thumbscrew clamps the indicator lug - thought it might compress the hole but can't see a slit through that piece. Anyway, if you drilled a hole above that one but at around 45° and ideally so that it also clamps with the same thumbscrew (for simplicity of use) you'd be able to angle the DTI for clearance but still retain the fine adjust you've built. Was trying to think of some sort of more infinitely adjustable pivot so you could choose the angle and then lock it....but that's maybe over the top and definitely a design problem for someone with more of a clue than I!

[nickel-city-fab]

oooo nice! i'm liking the twin beams (stiff design)

[ATW]

Thanks for the kind words guys.

Cenedd it clamps using a cotter (Think that is the UK term, not sure what the US term is) pointed at in the section shown below, note the CAD model doesn't show the necessary clamping relief in the center between the cotter and the square bar. The blue stud is Loctited into the brass cotter and the thumb screw when tightened pulls the cutter onto the shaft clamping it. The DTI dovetail to round shank clamp/adapter fits into the hole that gets clamped by the cotter.



Yeah a 45° would have been a nice touch, although I can still mount the DTI vertically on its bottom dovetail for best clearance but losing the ability to see its face on a full sweep.

Andy

[Cenedd]

ATW Ah, I see them there in the picture now.
Was thinking it could be done off one of these cotter's but it's drilled off-centre and would need to be expanded to an oval shape to handle both....and then realised I was (yet again) over-thinking and over-complicating it! How about a longer needle for the DTI when you inevitably end up with clearance issues? Yes it may through the scale of the DTI off but ultimately you're looking for relative difference rather than absolute measurement so it shouldn't be a problem.

[754]

I got very used to the Indicol holder. I think one advantage it may have is if you set up wrong and run into something, its not so stiff... it will move out of the way and fold up, or swing sideways... might save your indicator.
this type looks like very little give if you crash it?.

[ATW]

A solution to angling the indicator was within arms reach - just needed the light bulb moment to realise it - the ball joint from my Robin Renzetti indicator stand can be utilised to provide an extra degree of freedom to the indicator:


754 yes the indicator is likely to be the weakest link, so got to be careful.

[754]

The long vertical part that holds the Renzetti part... if you mod it .. might have to move hole up.. you can make it clamp with plastic element on either side.. Then, with the right drag on it , it has swingaway capacity... if the indicator body runs into anything..

[Bruno Mueller]

I purchased another Bosch lathe last year.
The problem with the machines is that there are no more original lathe chucks. The manufacturer of the chucks, the company "Röhm-Spannmittel" still produces this small size, but not for direct mounting to the Bosch lathe.
A good and inexpensive alternative are the small lathe chucks from the company "Sanou". Especially the version K01 -80B. However, you also need an intermediate flange.
I have made a mounting flange for such a lathe chuck for the Bosch lathe.
Here I show some pictures of it.





This is the lathe chuck.


The back side with the centering receptacle of the lathe chuck.


The lathe chuck has a very small overall height.


This is the mounting flange to mount the lathe chuck on the Bosch lathe. The mounting thread of the lathe is M14 x 1.5mm. The centering shoulder has Ø 16mm.
The flange was turned to fit the machine side. The mount for the lathe chuck was pre-turned and only finish-turned on the Bosch lathe.
This ensures absolute concentricity of the lathe chuck.


Flange attached to the lathe chuck.