IGRL Posted February 28, 2014 Share Posted February 28, 2014 Hello. I can no longer find a supply of carborundum slitting discs. 22mm (approx) which are less that .5mm thick. They all seem to be .6 now and they are usesless. Does anyone have any ideas? This is the currect project. A Gwalior Rlys mikado with English cab! Link to post Share on other sites More sharing options...
Kenton Posted February 28, 2014 Share Posted February 28, 2014 As one who rarely, if ever, uses them, what exactly are you using them for where that 0.1mm is so critical? A very good looking model though the prototype no my "cup-o-tea" Link to post Share on other sites More sharing options...
IGRL Posted February 28, 2014 Author Share Posted February 28, 2014 I cut all my sheet brass with them. Thicker discs just make a mess. I am fond of the loco as I spent a day driving one from Gwalior. Link to post Share on other sites More sharing options...
Kenton Posted March 1, 2014 Share Posted March 1, 2014 I have always cut sheet brass (I do very little as I do not scratch build if I can avoid it - I build kits) using a combination of tin shears and saws. But still am having difficulty understanding why a 0.1mm difference in thickness of the disc can have an apparently dramatic difference on the cut. These discs have a tendency to disintegrate in use dispatching shards all over the show, a top reason for not using them. They are also very uncontrollable unless fixed in position, another good reason to replace with something more workable. Tin snips/cutters can cut nearly all sheet brass thickness that we use as modellers. Saws are generally safe, by comparison. The edge is never going to be perfect whatever tool is used and will need some dressing with a file. Is it that the material used on the cutting face has changed rather than simply the 0.1mm thickness, perhaps coarser and the disc is catching more as it cuts? Link to post Share on other sites More sharing options...
IGRL Posted March 2, 2014 Author Share Posted March 2, 2014 Thanks very much for that. I shall contact them. Link to post Share on other sites More sharing options...
Sandy Harper Posted March 2, 2014 Share Posted March 2, 2014 If you are using your discs to cut straight lines in sheet, have you considered a skrawker? They are also sold by Eileen's and, although primarily designed for cutting plastic sheet, make a very nice straight cut in brass as well using a similar method for plastic. IE a number of passes to create a one third thickness (roughly) cut in the surface and then bend and snap. Finish off with a few strokes of a file. Regards Sandy Link to post Share on other sites More sharing options...
IGRL Posted March 2, 2014 Author Share Posted March 2, 2014 I have tried this but I am very good with Dremels and do most things with them. I also do silver jewelry in this manner (have done for years). Link to post Share on other sites More sharing options...
PGC Posted March 2, 2014 Share Posted March 2, 2014 If you are using your discs to cut straight lines in sheet, have you considered a skrawker? They are also sold by Eileen's and, although primarily designed for cutting plastic sheet, make a very nice straight cut in brass as well using a similar method for plastic. IE a number of passes to create a one third thickness (roughly) cut in the surface and then bend and snap. Finish off with a few strokes of a file. Regards Sandy Thanks for this tip, Sandy - I've been wondering for a long time how to cut sheet metal and get a straight line. Until now I've been trying with a piercing saw, and the line's been anything but straight (perhaps that's just lousy workmanship, of course!) Phil Link to post Share on other sites More sharing options...
IGRL Posted March 2, 2014 Author Share Posted March 2, 2014 If anyone is interested, there is a step by step thread on building this locomotive here. It is easy to join the forum. http://www.009.cd2.com/phpBB3/viewtopic.php?f=16&t=758 Link to post Share on other sites More sharing options...
Lady_Ava_Hay Posted March 2, 2014 Share Posted March 2, 2014 Hello. I can no longer find a supply of carborundum slitting discs. 22mm (approx) which are less that .5mm thick. They all seem to be .6 now and they are usesless. Does anyone have any ideas? I use Expo diamond metal discs. They are expensive but last for ages, don't explode and make the thinnest cut. Be bold as they do get extremely hot on a long cut and melting of the material being cut is a possibility. Link to post Share on other sites More sharing options...
IGRL Posted March 2, 2014 Author Share Posted March 2, 2014 Thanks for that comment. I have bought one from Enternal and will be trying it. Link to post Share on other sites More sharing options...
Sandy Harper Posted March 2, 2014 Share Posted March 2, 2014 Thanks for this tip, Sandy - I've been wondering for a long time how to cut sheet metal and get a straight line. Until now I've been trying with a piercing saw, and the line's been anything but straight (perhaps that's just lousy workmanship, of course!) Phil U R welcome Phil. Keep the saw for the wiggly bits! Sandy Link to post Share on other sites More sharing options...
IGRL Posted March 3, 2014 Author Share Posted March 3, 2014 For anyone who may be interested, this is a short vid. of the loco running close to completion. www.009.cd2.com/members/how_to/indian_mikado/indian_mikado.wmv Link to post Share on other sites More sharing options...
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