The Shop > Tools
More lathe gadgets
awemawson:
I use an Eclipse Demagnitiser - basically the 'E' part of an 'E&I' shaped transformer core suitably mounted - it works well. I used to use it for wiping floppy disks as well :ddb:
SwarfnStuff:
Just out of curiosity Vtsteam, are your machines aligned North South? Only ask because I read on another forum that being in line with the Earth's magnetic flux can often cause this phenomenon. Also read on the same forum that one machine shop tried re-orienting one of their lathes to be East West after degaussing it. This machine remained magnetically stable whilst the others re-magnetised. If I remember the post correctly the company decided that although the concept was proven, in their case the cost of moving all the machines was greater than the degaussing as needed so left things as they were. Sorry, I cannot recall the forum - interesting though. Incidentally my small 7x is North South and does suffer slightly from magnetism but turning it 90deg is not practicable in my miniscule shop.
John B
vtsteam:
Swarfnstuff, the lathe is E/W, and mill vertical, but good idea to check anyway. Not that I have the space to move them.
I'm guessing the problem started with my magnetic base indicator holder. I have a separate metal drip tray under the lathe (auto floor drip pan) that I'd sometimes stick the mag base to. I think that magnetised swarf and other objects/tools on the pan, and they in turn transferred it around the lathe and shop.
It doesn't take much magnetism to hold iron filings, so even a weakly magnetized tool can be a problem around swarf. I'm not sure how the magnetism got transferred to chuck jaws, but it has on the 4 jaw, which is a big problem with its exposed jaw threads. I need a de-gausser. I do wonder if It's possible that the swarf is magnetised, maybe and not the jaws? -- I don't know I'll have to check that.
Anyway, I really want to get rid of magnets in my shop (where possible) to see if that will help, and ironically Mick you started your other lathe gadget thread with the very toolpost clock holder I need to build to get rid of my mag indicator base at the lathe. A great little project for me in this situation!
guds777:
one quick question, doesn't the magnet affect the accuracy of the dial indicator.
rotorhead:
Hi Mick,
Just asking, but would an Aluminium disk in place of the steel or plastic reduce the magnetic field towards the gauge.
I'm no expert on these things or owt really, but I had the thought, any non magnetically attracted metal might serve this purpose.
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