It's many years since I've seen one of these. Morse taper and brass/bronze hammer in a very convenient design.

Not sure about adjustment . Have you tried a little lubrication ? I would think you would need to knock out the roll pin & dismantle to find the cause of the problem.

Edited By Dinosaur Engineer on 05/07/2015 17:58:39

Capnahab.

I have one of these, found in a skip during the black days at RR in the 1971 bankruptsy. .

If you look on the end of the bronze hammer, there is a slotted screwdriver cap which holds the end of the captive spring down the shaft of the thing; undo that and you will have access to the internal gubbins from which it might be possible to do something about seeing where the sticky point is.

As the Dinosaur Engineer says, the only other thing you can remove is the roll pin, but I suspect all that does is hold the MT blade in place through a slot in the blade. Take that out and you have everything in bits.

Regards

Brian.

I have used these, I agree with John they are a godsend, so much so that I wish I could find some more so that each lathe/drill could have one next to it, I assume they are not available anywhere…..

Baldric.

For those of a more nervous disposition where things that go "BANG" are concerned there is also another option

Capnahab,

It may be too late now as you said you were going to open your's up, but for what it's worth, my model is I think earlier than yours, I have two small slotted head steel screws instead of the roll pin. They are very tight, I have not pushed my luck since they would be easy to chew up.

They are screwed into a round brass closure plate slotted to guide the MT bar

At the heavy end, under the threaded steel plug, there was just the other end of the MT slider bar with what looked like a plain brass washer fitted to the end, acting it seems as a guide in the plain bore; no compression spring as I had expected. The spring must therefore be a tension spring acting from under that top washer.

I would be interested to hear what you find. As others have said, what a useful tool it is.

Brian

Chris, I still cringe when I think about the ritual banging in. At Matrix the hooter went at 8:03 and any young apprentice coming in after that got the treatment. I used to be late two or three times a week and endured the cacaphony of lead mallets on steel benches every time and eventually this came to the attention of Mr. Langley the apprentice supervisor and got me two days suspension.

Another acutely embarrassing situation at Armstrong Whitworth Aircraft was having to walk through the routing shop where the female operatives gave me a welcome of howls and wolf whistles which always turned my face crimson.

Were they the good old days?

Alan