Need end mill ground to size

vonleyser · Aug 9, 2018

Anyone capable of grinding an end mill to a specific size, I am needing a .3795 carbide 4 flute for a job.

OR

Who / what tool supplier can assist me with this.

Thanks in advance
Mark

guest · Aug 9, 2018

What's wrong with your local tool grinders?

ATG Incorporated Tool Grinding Houston Texas

Grinding Technology LLC - Grinding Technology

Custom Tool Grinding, Carbide End Mills & Drills, Custom form Tools

Mark Rand · Aug 10, 2018

I'm confused! You won't be using a four flute endmill for cutting a slot, so why can't you use a standard 3/8" or 5/16" endmill and make two cuts?

Conrad Hoffman · Aug 10, 2018

Especially because it's almost always better to climb cut.

vonleyser · Aug 10, 2018

Conrad Hoffman said:
Especially because it's almost always better to climb cut.

Not cutting a slot, I could have figured that out.
Cutting a circular hole on a manual mill, customer
wants a specific size, I’m tired of putting a piece
of paper in the taper to get a .375 endmill to cut
oversized.
Maybe I should just circular interpolate it manually.

Milland · Aug 10, 2018

While not the cheapest option, it is the fastest to get: McMaster-Carr Unless you're working with a really hard material you could use a HSS or cobalt reamer for much less.

Hazzert · Aug 10, 2018

vonleyser said:
Maybe I should just circular interpolate it manually.

Depends, can you rub your belly and pat your head at the same time?

I have had good luck using a basic cutter grinder to grind an endmill till it looked like a shallow angle dovetail cutter for use plunging.

Mark Rand · Aug 11, 2018

Boring head...

AD Design · Aug 11, 2018

You also haven't mentioned tolerance, depth, finish, or hole profile. Is it flat bottomed in a blind hole 2" deep or a through hole? Material and material condition? How many pieces? Others have made some good suggestions but perhaps a little more information can result in solutions that would better suit your circumstances. One suggestion, circular interpolation on a manual mill will likely result in a hole that's not very round or to a targeted 4 place decimal (.3795). Not trying to be a jerk, just trying to get you where you need to be for others to help you.

Larry Dickman · Aug 11, 2018

Reamer?

..…………...

vonleyser · Aug 13, 2018

AD Design said:
You also haven't mentioned tolerance, depth, finish, or hole profile. Is it flat bottomed in a blind hole 2" deep or a through hole? Material and material condition? How many pieces? Others have made some good suggestions but perhaps a little more information can result in solutions that would better suit your circumstances. One suggestion, circular interpolation on a manual mill will likely result in a hole that's not very round or to a targeted 4 place decimal (.3795). Not trying to be a jerk, just trying to get you where you need to be for others to help you.

Blind hole
Material is both Magnesium & Aluminum
Head of mill tilted 15 degree
36 holes on one part
24 holds on another
.230 deep on the deepest side
Cermatic buttons are installed
My tolerance is .379 to .3795 works the best

I was being sarcastic about circular interpolation

AD Design · Aug 15, 2018

Blind hole- End mill or boring head (much slower) Can you relieve the center of the hole?
Material is both Magnesium & Aluminum- Use kerosene or something made for the white metals, evacuate chips often w/air
Head of mill tilted 15 degree- spot face for full contact of final cutter size to avoid partial contact deflection
36 holes on one part- HSS will hold up just fine, be cheaper/easier to obtain and less likely to chip
24 holds on another- Only two parts in total? HSS over carbide for reasons above
.230 deep on the deepest side- Bottom of hole (square corners?) and taper of end mill face (most are) a problem? Center relief in part (if possible) helps a lot
Cermatic buttons are installed- Better mic the button, most ceramic doesn't like to be squeezed very much
My tolerance is .379 to .3795 works the best- You know your job better than I would

I was being sarcastic about circular interpolation- I'm a little slow to catch on sometimes.

Coadster32 · Aug 15, 2018

I'd go either the reamer route, or boring head. A ground emdmill may still cut a taper or possibly score the walls a bit. In a manual, it is quite possible that the emdmill you purchase may have a slight runout to it when in a collet clamped up, and won't "float" like a reamer would, producing an oversized hole. That is alot of holes, and understand your concern. Best of luck.

Search

Largest Manufacturing Technology Community on the Web

Search

Need end mill ground to size

vonleyser

Cast Iron

guest

Guest

Mark Rand

Diamond

Conrad Hoffman

Diamond

vonleyser

Cast Iron

Milland

Diamond

Hazzert

Stainless

Mark Rand

Diamond

AD Design

Stainless

Larry Dickman

Titanium

vonleyser

Cast Iron

AD Design

Stainless

Coadster32

Aluminum

Similar threads