| Gallery, Projects and General > How do I?? |
| a question about dies |
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| Chuck in E. TN:
I'e cut HSS tool lathe bits with a Dremel tool and reinforced cutoff disks. Should work for the die, but I don't know about drilling and tapping for an adjustment screw. Chuck |
| awemawson:
The adjusting screw would be in the holder, which is unlikely to be hard |
| mattinker:
You don't need to drill and tap for an adjuster screw. You need a pointed grub-screw to screw into the newly cut slot ( "V" the slot to provide a surface for the pointed grub screw to push on) that will open the tap. Two grub-screws into the dimples (drill tap and thread die stock [the handle] if absent) will close the die. Regards, Matthew. |
| Fergus OMore:
I think that you may be mislead. It's all good advice but the notch in the unsplit die is simply to hold the die from rotating. What you have bought is actually for re-threading a worn male thread rather than to cut a new one. With a bit of careful grinding, you can make it into a split die by cutting through where the notch is now. However, there is a catch- the die has no lead( pronounced leed) and you still may have trouble commencing the start of the tapping operation. What you need is to make a taper lead( leed) into the die with a tapered abrasive point. If you have followed an earlier posting there was someone who was making one single tap on a lathe- 1/4" x40 tpi - which is actually a measuring tap and is not cut but ground. If you follow the correct description of taps you will find that normally three taps are available. the first is obviously a First lead tap with a long taper and the 2nd cut a wee bit shorter taper and the third a bottoming tap which has virtually no lead. So, if you are still with me- you have something akin to a bottoming die. It is not called that but that is what it is for. Again, you have a 1/2" die and to use it without needing to be an Olympic athlete to add this necessary taper to your die. Does this help? Norman |
| stirling lad:
thanks guys for all your help,, Chuck, i've got a couple of the dies your talking about with the screw actually in the die split but most of my other ones just push a pointed screw into the split to open it up a little.. So is the consensus this; splitting this die would probably work in theory but that it's not meant to be split and the slot is just to stop it turning,,plus the tapered start is'nt enough for starting a cut,??mmmm, so why the 2 extra dimples just where you'd put them to close a die? .. :Doh: life would be so much easier if the lottery would hurry up and give me my turn at being loaded :ddb: then i would'nt have to faff about with dodgy tools in the first place... :zap: mike.. |
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