For the machinists - What type of endmill for extractor slot?
- Thread starter LVLAaron
- Start date
AlNyhus
Silver $$ Contributor
Nicely done.
-Al
LVLAaron
Gold $$ Contributor
Nicely done.
Another one of those things that makes you realize why gunsmiths can't make money, ha!
xr650rRider
Silver $$ Contributor
And at some point, you'll realize that the original design was functional and safer than the replacement.
Reminds me of the 60's when everyone wanted to make there bicycle into a chopper.
Reminds me of the 60's when everyone wanted to make there bicycle into a chopper.
Last edited:
AlNyhus
Silver $$ Contributor
I hit the Easy Button and just worked on people for a living.
4 flute carbide , stub length it won't flex as much , center cut in case you need to plunge cut.
Alex is spot on, live this everydayEdge prep is the most important thing for what we are doing. Usually far lower speeds than the tools are designed for. So a sharp edge helps. Some tools are intentionally not razor sharp to increase durability, that does not work out well for us with manual tools. In my experience, non coated end mills are the sharpest. I dont think at our speeds and feeds we really need the coatings. At least with end mills. The cheap non coated ebay end mills do as good as the expensive ones for the type work we do. 4 flutes for steel 2 for aluminum, wood, or composite is what I do. Because the stocks dull the endmills so fast and we are not using them at the correct feeds and speeds we go through them faster than we should so I prefer cheap. But not china cheap
The shorter you keep the cutter to the collet the less problem you will have with chatter and holding size, carbide doesn't take well to chatter.
Having some regrind cutters are nice for hogging out the majority of the material and then make the final pass with an onsize to bring it to size.
any good carbide 4 flute. hss is ok too but I found the cost savings vs tool life doesn't pay out. an extractor grove isn't deep enough for variable helix to make any difference. don't over think it.
shortgrass
Silver $$ Contributor
Remington 722, no 'original replacement' available
LVLAaron
Gold $$ Contributor
It made some kind of a difference. It cut perfectly on size... perhaps also due to the variable pitch of the flutes.
xr650rRider
Silver $$ Contributor
how much does the helix change over the depth of cut? Make it east and assume the cut was full depth .115" in one pass
shortgrass
Silver $$ Contributor
Have you used any? I have, a waste of 2 rivets,,,,, that are Ebay expensive by the way
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