A production shop needs enough lifetime out of their consumables that it is almost always better to buy cutters than take resources away from production for cutter grinding. A machinist at job shop is not useful if they can't make their own cutters for the occasional strange feature. Me thinks the breakdown is between production and job shops. Of course if this part is in volume, taking some time to explore the tool catalogue is more worthwhile. However, if someone is stumped enough by this problem that they are posting a question about it on this forum, they have already wasted more time than it would take to just grind the HSS, dump it into a flycutter, measure the effective diameter, and move on with the job. just isn't always the right choice economically.Nobody is saying you should make your own ball bearings. These companies are typically geared for maximum output with machines specialized for the tasks and you aren't going to make it any less expensively. Sometimes purchasing bushings, shafts, whatever doo-dad being massed produced by XYZ Corp, rather than making them yourself is a good way to cut costs. We have the machines and expertise to make just about anything within a 300x300mm envelope. ( one of my many side projects, if you will )Īll said, I do find it troubling, as well. To be honest, when working on customer's jobs I *am* more likely to order a tool for a job and charge it to that job ( unless I happen to already have one I made at some earlier time ), but *will* take the time to make something custom if I'm working on something for myself. ( used for various shaper/slotter/fly cutting tooling )
#Thread milling feature cam multiple lead full#
(I'd like to be wrong about that)Īnd, yes, I have a whole Kennedy 526 full of nothing but high speed and brazed carbide tools and blanks. I think that the number of us that *can* make their own cutters is diminishing, in rapid fashion. To keep machines running and order one for $12 from one of the many houses that schlep the chinese cutters. Vancouver Wire EDM - Wire EDM MachiningHi Marcus,įor myself, I think that there are many contributing factors for this.įor one, it seems as if most shops don't think they have time to stop and make a cutter, it being "more productive" Implant Mechanix – Design & Innovation - home Jobs like this seem so simple to me.I must really be sounding like an old fart, but back in the "Good Old Days" just about everyone would have made up their own in a few minutes on the bench grinder. Is it cheaper to spend time with a catalogue rather than in front of the grinder?ĭoes nobody have things like boring bars and HSS round blanks in their toolbox anymore? 0625 thread pitch start at the bottom helixing up in a ccw direction for a right hand thread this way with standard tooling you will be climb milling. you would program a 32 tpi double lead thread at. I've noticed that these kinds of discussions almost always result in a recommendation to buy a cutter from somewhere or other rather than grinding up a tool from scratch. Bill you can feed at what ever feed rate you want when your thread miling it's the geometery of the helix that is effected so you are right if using a lathe, you would double your thread pitch.
0 kommentar(er)
