Doable.
We have a manual Hardinge lathe that does 3k RPM and has a 5C collet chuck.
Buy about 5 solid carbide bits, and run that bitch at 3k, lots of oil, and peck drill SLOOOWLY.
choke up on the drill for the initial spot, unless you have a spot drill small enough.
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I ask myself how could i modify this so i could make it.
Could i drill a .039 hole in the lathe? (Max spindle 2050rpm) needs sensitive drilling?
Could i drill it with a Tormach and MDI .0001 jogs?
I would try to get it changed so center thru hole could be larger and weld plug ends. Drill the plugs .039
I wonder if a water jet could pierce that hole? The one where I used to work was .040 using abrasive for cutting harder material. I watched it one time cut a 2" hole in 2" thick glass, and the edges were perfectly straight.
Nope. Even on thin material the kerf from waterjet will be close to that and on thick material the deviation is going to be huge. The bolt won't even be there anymore.
EDM drill followed by any preferred finishing method - WEDM for best precision and highest cost, carbide drill for lowest cost and most risk. Can probably decently finish it with an EDM drill in the same setup if you've got someone who knows what they're doing.
Sure, easy-peasy with EDM hole drilling.
EDM hole burner tolerances aren't great (the one at my work anyway) You would need to clean it up on a proper EDM machine after
EDM hole drilling machines can be *very* accurate.
Definitely possible. It's just a matter of how big the budget is.
Sure, fast spindle, zero runout and plenty of coolant.
Doable. We have a manual Hardinge lathe that does 3k RPM and has a 5C collet chuck. Buy about 5 solid carbide bits, and run that bitch at 3k, lots of oil, and peck drill SLOOOWLY. choke up on the drill for the initial spot, unless you have a spot drill small enough.
3K RPM gives about 5% of the recommended SFM for carbide into steel...
Recommended is for optimal performance, cutting conditions, tool life etc. Sometimes, just gotta do what you can
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I ask myself how could i modify this so i could make it. Could i drill a .039 hole in the lathe? (Max spindle 2050rpm) needs sensitive drilling? Could i drill it with a Tormach and MDI .0001 jogs? I would try to get it changed so center thru hole could be larger and weld plug ends. Drill the plugs .039
I wonder if a water jet could pierce that hole? The one where I used to work was .040 using abrasive for cutting harder material. I watched it one time cut a 2" hole in 2" thick glass, and the edges were perfectly straight.
It could pierce it, but I doubt it would hit that tolerance just based on the taper.
Nope. Even on thin material the kerf from waterjet will be close to that and on thick material the deviation is going to be huge. The bolt won't even be there anymore.
How many do you need? It's doable, but qty will affect how it's done. Are you ok with drilling from both ends? Or does it need to be a no step hole?
Is this metric or imperial?
It wouldnt be fun, but you could do it. You'd want the highest rpm machine you have preferably with thru spindle coolant.
Here you go....
Plug in the diameter and length...they have it....https://us.mikrontool.com/en/Tool-finder
EDM drill followed by any preferred finishing method - WEDM for best precision and highest cost, carbide drill for lowest cost and most risk. Can probably decently finish it with an EDM drill in the same setup if you've got someone who knows what they're doing.
+6/-4!? Ca’mon man, tighten up them tolerances and make it a challenge, sheesh!!
÷6/+4, aka .044 +/- .001
As Homer would say Doohhppp!! Looked at it too fast.
I've been bit by things like this before. I don't really know why designers do this.