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Member postings for Breva

Here is a list of all the postings Breva has made in our forums. Click on a thread name to jump to the thread.

Thread: Machining - sitting or standing?
08/09/2014 22:36:12

I use one of those shower stools with the adjustable legs,used by invalides . Light and strong and easy to set at "your" height. It was my dear departed mother in law's. Only thing she left medevil

I am recently making a habit of sitting any time I can and it has made a great difference to my level of backpain.

There are some things you just can't sit for but the secret (for me anyway) seems to be to alternate from standing to sitting frequently. I keep the chair set fairly high and have no problem working at the bench. I use bed-stops, set the lathe on power-drive and sit and watch it work!

John

Thread: Free Plastic
04/09/2014 22:52:30

Graham,

A very helpful gesture indeed. Many thanks, I would love some.

PM on its way

John

Thread: Did you ever see one of these??
02/09/2014 22:55:06

Julian, please excuse my ignorance of clocks. What function would the unit you describe in Church clocks have?

One thing not shown in the photos is the round knob that was on each handle. The knobs are about 30mm. dia with a straight knurled edge of a reddish brown material like a soft bakelite that seemed to delaminate with age.

Quite a puzzle this one.

John

01/09/2014 23:20:12

It certainly could be used in the way described in your posts but it is so small that it could not support much weight. My best guess is that it was of use to line up something accurately to something else.

It looks like it was probably made pre-1950. Unless somebody has actually seen one of them before it is difficult to imagine it's exact use. Bob's guess is as good as any so far!

Thanks for all your suggestions.

John

31/08/2014 21:35:21

Thanks for the replies gentlemen. I doubt if it was any of the items suggested. It is quite a small unit being less than 6" tall. It is fairly accurately machined.

Could it be anything to do with aircraft instruments of the WW2 era? Anything to do with aiming etc? It is a pure guess but I know several came down in the area and one of them went on fire and was partly burned out.

My father lived in a quiet rural area and there would have been no connection with factories, printing etc. in the area. The most complicated bit of machinery in the area would have been a car or a tractor at the time!

It's a bit of mystery but I'd love to knw what it was.

30/08/2014 21:34:54

I found this while clearing out my late father's workshop. I wonder if anyone on the Forum can identify what it might have been or what it might have been part of?

It stands less than 150mm. tall. The shaft on the bottom rotates and traverses the whole unit along in a dovetail track using a rack and pinion. The higher up shaft raised / lowers the brass platform on it's stem.

Total travel left to right is about 70mm and rise and fall movement is about the same. There is no name of any sort on it. Most of it is made from brass and both movements are still tight with little "play". The rusted base plate had it's edges angled as though it also ran in a dovetailed track. This would have given movement in he x,y and z planes.

All ideas of it's origin or use would be welcome.

It strikes me as a possible building block for a Tool and Cutter grinder.

Thread: Bantam
20/07/2014 01:38:39

Jack,>>

FWIW, I got a Transwave static convertor manf. by Power Capacitors rated at 0.37kW - 3.0kW for mine. It works well. You do have to turn a switch occasionally on the front to match the load. usually on low speeds seems to need more torque and therefore you dial it up a bit and vice versa. It is really not a big deal and your ear will tell you when it needs a bit more or less. I chose it at the time as it allowed me to keep the original two speed ranges on the original motor.>>

After a bit of head-cratching I wired it in myself and I'm no genius with 3 phase setups. The literature that came along with it was scant on the wiring but if you go that way ask the company for help.I found them helpful.>>

Re the bandsaw, depending on model, you may be able to make up a layshaft to reduce the speed for metal cutting. I have a Startrite Bandit but the motor is sort of built in in such a way that it would require a fair bit of tinkering to set up a layshaft so I went for another option. There's info on the Forum here about bandsaws. I would still suggest you aim for some sort of mechanical way of cutting metal. Sell the hacksaw!>>

I have a copy of the American owners book for the Bantam. It is good on dismantling and setting up which is almost completely absent in the English version. I can PM it if you need it. (It no help on the wiring)>>

John>>

19/07/2014 01:10:11

Jack,

Hope you enjoy your Bantam. Mine works off a converter from the same source and runs well. Solid and straightforward, it should live up to your expectations if it has been cared for in its previous life.

I see you have wisely got yourself a bandsaw. Although not quite 70 I found out long ago that the joys of the hacksaw were much over-rated!

Have you any projects in mind?

John

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