Thread: I need some 1mm endmill any one here have them ?

1 mm is VERY small, out of interest what will you be using it for and what's the rpm of your mill? I find 2 mm end mills difficult to use without snapping them, so I can't imagine what 1 mm would be like!

Originally Posted by Pete F

1 mm is VERY small, out of interest what will you be using it for and what's the rpm of your mill? I find 2 mm end mills difficult to use without snapping them, so I can't imagine what 1 mm would be like!

Hi Peter.
i'm running them at 3600RPM .

Ok, what material? On a CNC machine?

I run my 2 mm at 6000 rpm and even with a very low feed rate it's easy to snap them. I would consider a cutter like that "disposable" on a manual machine.

Originally Posted by Pete F

Ok, what material? On a CNC machine?

I run my 2 mm at 6000 rpm and even with a very low feed rate it's easy to snap them. I would consider a cutter like that "disposable" on a manual machine.

it on the Manual machine and cutting brass and alu.
Peter

Try Bunnings... Stop laughing have you looked at the dremel accessories section in Bunnings? I remember seeing some very small cutters in that section.

Spindle rpm is going to be a problem, to get ~ 100 fpm on a 0.040 cutter you'd need 10,000.. You could strap a dremel onto the spindle

Ray

Originally Posted by thorens

Hi Peter.
i'm running them at 3600RPM .

Then you do not need ONE 1mm endmill. You need 30 1mm endmills. This assuming you keep- trying for one hour, and it takes you 2 minutes to swap the cutter

Seriously, you have no chance with such a slow spindle. Unless you have a high speed spindle that could fit into your existing spindle. I would rather question if there is another way to do what you need to do. Like for example using a 1mm slitting saw instead. But we do not know what you are trying to do...

Yes, based on my (sometimes frustrating) experience with 2 mm cutters, I agree with the above. Without over-speeding the motor, 6000 rpm is all I've got, and it's about 14,000 rpm too slow The issue I find with these small cutters is even a slight increase in feed (such as you may see when manually feeding) and they'll just instantly snap. They also take forever to do any work, unremarkably based on the 1/2 cutter diameter rule, and I think even that max is pushing these cutters too far!

RS components sell them. They're typically used in rapid prototyping of circuit boards by CNC engravers.

Buy End Mills RS 24.5mm HSCo End Mill, 2mm Cut Length, 1mm Cut Diameter, 3 Flutes RS 31-068-010 online from RS for next day delivery.

At $16 ea breakages would soon get expensive.

Originally Posted by cba_melbourne

Then you do not need ONE 1mm endmill. You need 30 1mm endmills. This assuming you keep- trying for one hour, and it takes you 2 minutes to swap the cutter

Seriously, you have no chance with such a slow spindle. Unless you have a high speed spindle that could fit into your existing spindle. I would rather question if there is another way to do what you need to do. Like for example using a 1mm slitting saw instead. But we do not know what you are trying to do...

Hi Chris.
you not wrong . i would have use the slitting saw but i don't have the Hozirontal mill only vertical and i'm trying to cut into the 8mm brass 18mm long , depth of cut is 6mm . i did one before with 1mm endmill with success .
Peter

1mm Three Carbide END MILL FOR Watchmaker Lathe | eBay

I have a Nikken spindle speeder with a 5:1 ratio, which turns my 2000 rpm into 10000 rpm. Great for small endmills but never used a 1mm size. Have seen a high speed air spindle mounted on a mill. It was water cooled and from memory was cheaper that I thought it might be (? $300) Chinese of course but much cheaper than a spindle speeder.

Mark

Comes to mind an article in Model Engineer's workshop. MEW103 page 42 to 45. Title: "DIY air turbines for PCB's, engraving, and internal grinding etc". The turbine is driven by vacuum from a vacuum cleaner (which also sucks away the cutting dust). The maker claims 18,000 to 24,000rpm no load speed, tested with a 1.6mm carbide endcutting router bit for pcb boards.

I have about a dozen carbide slot drills. 1/8" shank ranging in size from 0.08 to 2.2 mm, but as others have said you need a high speed spindle to use them effectively. The recommended speed is 30K rpm. The ones that I have are intended for routing glass re-enforced fiber ie PCB material. Even so they snap like crazy if you push them too much. Having said that the shanks are good for scribers or tool bits particularly boring bars.

Originally Posted by thorens

Hi Chris.
you not wrong . i would have use the slitting saw but i don't have the Hozirontal mill only vertical and i'm trying to cut into the 8mm brass 18mm long , depth of cut is 6mm . i did one before with 1mm endmill with success .
Peter

Is it possible to change the way you hold the workpiece and use a slitting saw in the vertical spindle, cutting from the side?

bollie7