The Wangtek :) Ok, what diameter is it supposed to be? Cheers Karl ------------------------------------------------------------------------------ Karl Maftoum Computer Engineering student at the University of Canberra, Australia Email: k.maftoum(a)student.canberra.edu.au

On Sun, 2 Aug 1998, Tony Duell wrote: A year or so ago, I made up a replacement 'tire' (tyre for you, Tony) for a drive in an old Televideo TS816 from a rubber grommet. Fortunately, the spindle was about .25" and the groove diameter of the grommet was slightly larger than the diameter that the tire needed to be. I was able to cut and sand it down to the desired diameter and cement it onto the spindle. Worked like a champ! When I did it, I used a lathe to spin a rod on which the grommet was mounted, but an electric drill would probably work as well. - don

On Mon, 3 Aug 1998, Tony Duell wrote: With a very sharp cutting tool! Rather dependent upon the drive. In many, the tyre is rather inaccesible, and then there is the risk of jamming things up with rubber dust/shavings. - don

On Mon, 3 Aug 1998, Tony Duell wrote: [snipsnip] A trick I have used when faced with turning rubber, neoprene, and the like, is to fix the piece strongly to whatever spindle you are using, (lathe, mill, 1/4" drill motor, etc) and then freeze it solid with either liquid nitrogen or 'freeze mist' from an electronics parts store... both substances are readily available... LN2 is much more enviro-friendly, though... and a liter of it is wonderful fun if you're into science-pranks and demos. I especially like the super-conducting levitating magnets from Edmund Scientific.. At any rate, frozen rubber resembles wood and can be worked the same. Cheers John

On Tue, 4 Aug 1998, Tony Duell wrote: Over here, it is commonly available for etching/cleaning swimming pools - at least on the left coast. But we have the same high degree of idiocy, also! - don

Jim wrote: I believe he was referring to the H2SO4, sulfuric acid. Liquid nitrogen would probably be too cold and crack the outer concrete/tiles. I used to love taking stuff into liquid nitrogen in school and then tossing it against the wall - what a mess a green grape made. This was until someone got the neat idea to use a mouse...yuk Don't they still sell a cooling spray for tracing heat related faults? I have a case of it (maybe less) that I bought at Tandy on sale some time back and it lasts a while if you use it carefully. I bought it with the oncoming of all the BS with restrictions on certain compounds putting holes in our outer atmosphere and because it was about 1/3 of normal cost. I don't have a TRS catalog handy but even if the stuff I have is off market, they should have suitable substitute available. I'm sure MCM, Mouser, Digikey and others must have something. -- -------------------------------------------------------------------- Russ Blakeman RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 Phone: (502) 756-1749 Data/Fax:(502) 756-6991 Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.tripod.com/~RHBLAKE/ ICQ UIN #1714857 AOL Instant Messenger "RHBLAKEMAN" * Parts/Service/Upgrades and more for MOST Computers* --------------------------------------------------------------------

On Tue, 4 Aug 1998, Jim wrote: Hardly! Cleaning/etching swimming pools with dilute hydrochloric (muriatic) acid. - don

On Mon, 3 Aug 1998, John Lawson wrote: I recall one of the machinists doing that when I was a summer intern in a machine shop whilst in high school. Seems like I took the excess LN2 and froze a chap's sponge rubber chair cushion. It turned to dust, of course, when he sat on it. - don