JasonB | 04/08/2014 15:10:27 |
![]() 25215 forum posts 3105 photos 1 articles | Mine are all horizontal except the boring bars where the negative rake also gives a bit mor eclearance under the tip so it fits a smaller dia hole.
J |
Ian S C | 05/08/2014 11:23:00 |
![]() 7468 forum posts 230 photos | Mine are flat, but these tips that I use in the 50 mm face cutter on the vertical milling machine are slightly negative at the edge. Ian S C |
Oompa Lumpa | 05/08/2014 21:34:11 |
888 forum posts 36 photos | Spurred on by the recent posts about toolholders I decided to set to and start making some holders for the rather large quantity of carbide tips I have accumulated. I had decided some time back that I would use Silver Steel for my toolholders, that way I could harden and temper them if I thought that was needed but I would be using a good quality material if I didn't so the chance of failure would be minimised. Silver steel is not hard to machine, in fact it machines well and the finish shows a quality tool. First up was this toolholder to hold these threading tips I had been given some time back. They are the perfect pitch for a good number of threads I cut, metric fine: This is just one particular type from a good selection: Some of the tips have a chipped edge but the boxes are all good tips so I will make those toolholders first, but there are some good tips in the trays - especially some of the grooving cutters: This is my first attempt at the threading toolholder and it turned out well. I made the 3mm retaining screw from a cap screw as shown by one of the other forum members in another thread (Thanks for that):- There is 2.5mm of meat under the tip so I am hoping that's going to be enough, I am comfortable with it - we will see how it will work out because the cut doesn't take off much material so it will be fine: I hope this inspires others to do the same. It isn't hard and is a cheap way of getting more toolholders. I started off with a piece of 12mm silver steel, machined two flats opposite each other effectively making it 10mm top to bottom but leaving it 12mm across. I machined the flat for the carbide tip itself at 90 degrees to the two flats and this should make it easy to line up square for use. graham. |
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