Marker paint that changes colour with heat - someone mentioned this to me and I wondered what it is called? - used for sweating out studs in aluminum castings and turns colour just before the Al starts to melt. Charlie+
Page 592 of mcmaster carr catalog on line has crayons that will melt at specific temperatures.
Wes
-- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller
Tempilstiks and Tempilaq are what's normally used to check surface temps. They melt on reaching the stated temp. Might be cheaper to get a reflected IR surface temperature gauge than a whole set of Tempilstiks, the guns with laser spotters run about $20-40 now, cheaper if you've got an HF coupon...
Stan
Tempilac or Tempilsticks depending on what you want.
There's no need to get the casting that hot to remove a stud. Just wipe a little motor oil on the area of interest and heat til the oil smokes, that's hot enough. phil
Temperature Indicating Crayons -- McMaster Carr; available in the following indication points:
104° F 188° F 256° F 350° F 463° F 650° F 1022° F 1500° F 109° F 194° F 263° F 363° F 475° F 700° F 1050° F 1550° F 119° F 200° F 275° F 375° F 488° F 750° F 1100° F 1600° F 125° F 206° F 288° F 388° F 500° F 800° F 1150° F 1650° F 140° F 213° F 300° F 400° F 518° F 850° F 1200° F 1700° F 150° F 219° F 313° F 413° F 525° F 900° F 1250° F 1800° F 158° F 225° F 325° F 425° F 550° F 932° F 1300° F 1900° F 169° F 239° F 338° F 437° F 575° F 950° F 1400° F 1950° F 175° F 250° F 344° F 450° F 600° F 1000° F 1450° F 2000° FLLoyd
On Wed, 21 Apr 2010 08:33:38 +0100, Charlie+ wrote as :
Just to say thank you all for your answers and information - the motor oil idea sounds cheap and cheerful also and might be worth a try to start! Thanks everyone - Charlie+
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