hardened Stainless help

Thanks for all the replies. I bought 4 hss 4mm drill bits for £2.60 in total and managed to get the job done although it was a bugger. The second hole I managed to get through with a small center drill, I turned it and drilled from other side again with the center dill before hitting it hard with a couple of the 4mm bits.

The first hole I didnt center drill I just went in with a 3mm bit which got halfway through before progress became impossible, that obviously heated and hardened the material turning it into a nightmare. Again thanks for all the advice.

Ady.

Austenitic Stainless is softened by heat and water quench.

Martensitic Stainless is hardened by heat and quench.

.

Thanks, Les

I thought I had missed them, but

I bagged me a bargain in Manchester, yesterday

MichaelG.

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Edited By Michael Gilligan on 14/03/2014 16:44:59

Grabbed myself a set last week, converted them for use as a small height gauge .. works well enough for normal marking out, anything finer I use my 'decent' gauge.

George

My main reason for buying was to have something to experiment with

... for Remote Reading, as per this thread.

I am hoping that the hearsay is true, and the 1.5 volt circuit is a good "clone" of the original Sylvac system.

MichaelG.

Hi Michael,
They were still being sold at £8.99 in Aldi Ormskirk yesterday. I will have to see if they reduce them.
On the subject of the link in your last post I have confirmed today that my design of interface to "Yuriy's Android DRO" works with iGaging scales as well as 2 x 24 bit, BIN6 and 7BCD scales. This is after building a unit to emulate the iGaging protocol.

Les.

Les,

Thanks for the update.

MichaelG.

I was very tempted to buy a pair yesterday, then I reminded myself I have four pairs of digital calipers already. Then decided I really didn't need the 33 draw cabinet either

At least I managed to get a very nice 'wixey-type' angle gauge from CPC, with built in (properly adjustable and quite sensitive) spirit level and a very handy absolute function, two features not on the typical gauges, and less than a tenner.

Neil