View Full Version : heat shrinking


03-13-2006, 06:53 PM
what does the process of heat shrinking involve and what tools are needed ??

03-13-2006, 07:52 PM
There are many ways to do it but basically you need a torch, oxy-acetylene or BernzOMatic, a spray bottle of water, and maybe a hammer and dolly. Youre simply heating the metal to make it more malleable, which also rearranges its molecular structure, and then you can work it while hot and cool it to shrink it, or you can simply heat it slowly and then cool it rapidly causing it to shrink. Its easiest to compare it to tightening/shortening a rope by tying knots in it. Although thats not an accurate explanation scientifically, its somewhat similar. :)

John Kelly
03-14-2006, 07:32 AM
Anything that will supply enough heat to make the metal steam when quenched will shrink the surface area. The lower the temperature, the less distortion you will get, as long as it steams. There is no need to get the metal red hot or blue hot to shrink.

Len has stud welders for sale that have shrink attachments, a torch will work, a clogged sanding disc can supply enough friction to shrink, and my favorite, the shrinking disc:


John www.ghiaspecialties.com