Magnets on the work bench
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From: Greegor on 10 Feb 2010 23:20 Jan Panteltje wrote [...] JP > Very easy, also used the magnets to magnetise my screwdrivers... JP > Works much easier. lil > Not in the real world of stainless steels being in wide use. Depends on the alloy. Aren't most stainless machine screws made from alloys of stainless with ferrous steel in them?
From: D Yuniskis on 10 Feb 2010 23:32 Hi Jan, Jan Panteltje wrote: [attributions elided] >>>> <grin> We don't allow magnets in the house (way too much magnetic >>>> media!) >>> My floppies are far away in the attic, next to the CRT monitors... >>> The CRT stuff was why I kept magnets away. >> I think the only floppies I now have left are those for the Unisite. >> I'm more concerned with disks, mag tape, video tape and audio tape >> (the last two just until I can finish transcribing everything to >> digital format) > > OK, your posting reminded me to keep the magnets aways from my 1TB USB harddisk.... > it is full, can you imagine, wiping out 1 Terabyte ... <grin> I have 5T spinning and another ~10T "off-line" (tape and disc). Not counting audio/video media. Note that an OS failure can trash your drive in half an Ohnosecond (been there, done that... opted not to buy the T-shirt). This is why I backup on tape and optical media :< > I still have an old VHS in the attic, but everything was copied to CD (DivX) or DVD long ago. I've been slowly moving tape and LVD onto DVD but it is a time-consuming process. I've rescued a pair of "decent" pro-grade VCR's that I hope to bring to the task (once I get them running :< ). >>>>> Normally screws are all over the place, but with these magnets everything just jumped to it :-) >>>>> Very easy, also used the magnets to magnetise my screwdrivers... >>>>> Works much easier. >>>> Only works with ferrous screws. Someday you'll find yourself wondering >>>> why a particular screw "doesn't stick" (even if only for a moment). >>>> Then, you'll find a more universal way to hold screws on your >>>> screwdriver! ;-) >>> Glue? >> There are some mechanical devices that can do this. > > Yes I had one, a screwdriver with a split point in a hollow tube, > but that did not work on those cross-head screws. > No idea what happened to it... The split shaft is only good for slotted screws. Also, you have to discipline yourself *not* to use it "as a screwdriver" (i.e., not to apply much torque with it). There are other devices that will clip onto the shaft of a {round, hex} screwdriver and grasp the screw from beneath the head. This works with even nylon (soft) screws. And, allows you to use whatever screwdriver you need (e.g., phillips, reeds and prince, clutch, torx, etc.) for the fastener at hand. >> I used to use >> a magnetic screwdriver until encountering painted/plated nonferrous >> screws (and wondering why it wouldn't "stick"). The same holds >> true for nylon, of course. Also, when working in tight quarters >> in a ferrous box, screws tend to "lean" off the screwdriver >> towards the wall of the box -- since mounting holes are often >> close to the edges of a box. > > Drop of ten second glue, but if you do it too often the screw head gets full and impossible to unlock.
From: Archimedes' Lever on 11 Feb 2010 02:44 On Wed, 10 Feb 2010 20:20:37 -0800 (PST), Greegor <greegor47(a)gmail.com> wrote: >Jan Panteltje wrote [...] >JP > Very easy, also used the magnets to magnetise my screwdrivers... >JP > Works much easier. > >lil > Not in the real world of stainless steels being in wide use. > >Depends on the alloy. > >Aren't most stainless machine screws made >from alloys of stainless with ferrous steel in them? Yes, but not enough iron to be magnetic or to rust with any great speed. Most are non-magnetic. If your "stainless" dinnerware sticks to a magnet, it is because it is plated or clad, not because of the stainless. I have had heavy stainless dinnerware that was all stainless through and through, and it never rusted, nor would it stick to a magnet.
From: Falk Willberg on 11 Feb 2010 03:39 Am 10.02.2010 23:54, schrieb Jan Panteltje: > Falk Willberg wrote .... >> I was wondering, why those fine HMC104Xs kept showing wrong values, even >> though I had removed all magnetic stuff and put it at least 2m away. >> >> After an hour I found some old Deutschmark coins, NT$ coins and >> paper-clips in the drawer below the work bench.... >> >> Falk > > Hey, my workbench has steel drawers :-) Even worse... Falk P.S.: My workbench is entirely made from wood. Before ~1970 it was a standard desk at the Krupp Widia Company in Essen.
From: legg on 11 Feb 2010 06:45
On Wed, 10 Feb 2010 20:09:08 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >Just got myself some small magnets, these are not very strong, >specified as about 1.2 Tesla IIRC, but anyways, >had to take some stuff apart, and had them on the work bench. >Normally screws are all over the place, but with these magnets everything just jumped to it :-) >Very easy, also used the magnets to magnetise my screwdrivers... >Works much easier. Magnetized tools can make manual smd placement a nightmare. RL |