Graham Posted September 8, 2018 Report Share Posted September 8, 2018 Ok next question anybody used one and are they any good? Seen a few videos on YouTube and they seem quite a good piece of kit Quote Link to post Share on other sites
Drewmotty Posted September 8, 2018 Report Share Posted September 8, 2018 Chilliman has used one to good effect. Quote Link to post Share on other sites
ed_h Posted September 8, 2018 Report Share Posted September 8, 2018 I have used a shrinking disc. In some cases, it worked magic. In others, not so much. It's likely just my inexperience, but I had trouble getting consistent results. Ed Quote Link to post Share on other sites
Chilliman Posted September 9, 2018 Report Share Posted September 9, 2018 I've got a set of the discs and used the large one on a bonnet earlier this year, there was a raised section over lying the reinforcement frame, took about half an hour of steady work just heating and quenching and the metal shrank back beautifully to where it should be.... Quote Link to post Share on other sites
stillp Posted September 9, 2018 Report Share Posted September 9, 2018 Seemed to be a lot of sparks in the youtube video I saw. How much metal does it remove? Pete Quote Link to post Share on other sites
Chilliman Posted September 9, 2018 Report Share Posted September 9, 2018 How much metal does it remove None, it heats the panel by friction and then when you dose with water in causes it to gradually contract, I've never produced sparks with these discs Quote Link to post Share on other sites
pfenlon Posted September 9, 2018 Report Share Posted September 9, 2018 I thought it was a new form of Braking aid for big blokes? remember the judge asking what a digital watch was, I'm in his club too. Quote Link to post Share on other sites
stuart Posted September 10, 2018 Report Share Posted September 10, 2018 I have the large and the small ones and sometimes it works well others not so, technique takes a bit of getting used to. Stuart. Quote Link to post Share on other sites
Waldi Posted September 10, 2018 Report Share Posted September 10, 2018 (edited) Interesting technique, thanks for sharing. I had a body craftsman remove bulges in an aluminium boot lid (non-TR), he used a TIG torch, without weldfiller, to give local heating followed by cooling with a wet sponge, he was a real craftman. This technique seems less risky and cheaper. Waldi Edited September 10, 2018 by Waldi Quote Link to post Share on other sites
stillp Posted September 10, 2018 Report Share Posted September 10, 2018 I did some shrinking on a front wing, using a carbon arc torch. Technique was to heat a small area red hot, which makes it expand and bulge out. Flatten the bulge with a hammer and dolly. Quench with a wet rag. Repeat as necessary. Biggest problem was that the carbon arc torch is a bit too fierce. Pete Quote Link to post Share on other sites
Ian Vincent Posted September 11, 2018 Report Share Posted September 11, 2018 I used the same approach as Pete on a rear wing but with a blow torch and a shrinking hammer. Worked a treat but if I were doing a bonnet (from what I have heard) I would think a shrinking disc would be better. Rgds Ian Quote Link to post Share on other sites
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