• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.
  • Some users may still have issues remaining logged into the forum. Please delete old bookmarks. If you are still having issues, go to the Site Issues forum here and let us know EXACTLY what you clicked on before the login issue arose, so we can try to track it down. We are working on this, and appreciate your patience. Thank you.

[4]

Indexable end mills

January Project of the Month [3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

Moper361

Active Member
Active Member
Joined
Sep 15, 2017
Messages
139
Likes
236
#1
Hello all .Finally im on my way back home to my hobby room after 3 weeks away for work for a nicely earned break .While ive been at work i have managed to fill my head with a million things i want to change and build lol as the job has been quiet so have had plenty of day dream time haha and spent a load on buying stuff online for my shop the idle mind is dangerous when you have this hobby . I would like to know if any of you can give advice on smaller indexable end mills 1/2 inch upto inch .Ive been looking at a few and wondering how they perform against the regular 4 flute end mills im using now i only use chinese brand standard end mills at the momment but maybe interested in a few smaller indexable end mills if they are any good .My use is just basic stuff cutting a ledge or slot in brass aluminium and steel .my mill is nothing fancy just a chinese unit but seems to do the job for me .Im limited to 6 speeds ranging between 75 rpm to 1600 rpm i dont run a constant cooling system .Any help or thoughts appreciated on the subject
Regards Nat
 

Hukshawn

H-M Supporter - Premium Member
H-M Supporter-Premium Member
Joined
Nov 19, 2016
Messages
1,119
Likes
741
#2
This old Tony uses 3/8, 1/2", 3/4" shars indexable end mills. I've many times considered getting some and many times almost pulled the trigger but shipping to Canada is brutal.
 

4gsr

HM Shop Superintendent
Staff member
H-M Supporter - Sustaining Member
Joined
Aug 8, 2011
Messages
4,835
Likes
3,118
#3
How heavy of a mill do you have? Is it a Bridgeport clone? or smaller?
 

Moper361

Active Member
Active Member
Joined
Sep 15, 2017
Messages
139
Likes
236
#4
How heavy of a mill do you have? Is it a Bridgeport clone? or smaller?
Think this tge best way to discribe it is not huge and i usually run a mt4 er40 collet chuck the ddrill chucks in there as i drilled some holes in a work peice last time i used it 20180111_161109.jpg
 

jdedmon91

Active Member
Active Member
Joined
Dec 29, 2017
Messages
30
Likes
86
#5
Hello all .Finally im on my way back home to my hobby room after 3 weeks away for work for a nicely earned break .While ive been at work i have managed to fill my head with a million things i want to change and build lol as the job has been quiet so have had plenty of day dream time haha and spent a load on buying stuff online for my shop the idle mind is dangerous when you have this hobby . I would like to know if any of you can give advice on smaller indexable end mills 1/2 inch upto inch .Ive been looking at a few and wondering how they perform against the regular 4 flute end mills im using now i only use chinese brand standard end mills at the momment but maybe interested in a few smaller indexable end mills if they are any good .My use is just basic stuff cutting a ledge or slot in brass aluminium and steel .my mill is nothing fancy just a chinese unit but seems to do the job for me .Im limited to 6 speeds ranging between 75 rpm to 1600 rpm i dont run a constant cooling system .Any help or thoughts appreciated on the subject
Regards Nat
211a99e51a4bec88a1216ab4d855262d.jpg This is my 3/4 insert mill. I’m working on boring bar conversation into a turning tool.

I have had this tool for 3 or so years. Use it often I picked up from a local distributor. At the time it was around $100



Sent from my iPhone using Tapatalk
 

Wreck™Wreck

Former Member
Former Member
Joined
Sep 29, 2014
Messages
2,094
Likes
1,699
#6

jdedmon91

Active Member
Active Member
Joined
Dec 29, 2017
Messages
30
Likes
86
#8
B

Buffalo20

Guest
#12
I have 3 sets of them, bought one new and got the other 2 set, in plant shut down buy ups. One set uses CCMT inserts, one uses AKPT inserts and the last set uses some unknown insert. They work okay, but they are nothing special, knowing what I know now, I would never buy another set, unless it was a Kennamatal or similar brand unit, you buy cheap, you get cheap.
 

mikey

Active User
H-M Supporter-Premium Member
Joined
Dec 20, 2012
Messages
3,550
Likes
3,622
#13
I think i will give it a go at the end of the day i dont push my mill hard and am conservative with my cuts so i cant it being an issue
Just curious as to the max speed on your mill. Reason I ask is that inserted carbide end mills run at much higher speeds than most hobby machines can run at. Take aluminum for example. Cutting speeds can vary with the insert and manufacturer but a typical average is 2000-3000 sfm. So, for a 1/2" diameter cutter used in aluminum, you are looking at a little over 19,000 rpm. Not saying it won't cut but it won't cut the way the manufacturer intended, like Wreck said. Just food for thought and at the end of the day, its your money but for a small mill like yours, HSS or cobalt might work better.
 

ericc

Active User
Active Member
Joined
Dec 24, 2013
Messages
269
Likes
66
#14
Just because your mill cannot hit 19000 rpm doesn't mean that these inserted end mills are useless. I tried to cut a slot in a mystery 4140 round. The reason I say mystery is that it was a gift and had no certs. It did have paint on the end, so it could have been pre-hard. The Chinese end mill set wouldn't cut and just made the poor Jet knee mill at Techshop rumble. I suspect that one of these inserted end mills could have done the job. After reading a bunch of negative reviews online for use on small mills, I made a poor-man's version with a small round steel bar with a slot cut for a cobalt lathe bit rigged up like a fly-cutter. It was retained with a section of water pipe used as a sleeve. It got through the cut at a slow speed and glacial feed rate. I suspect that this cut would have required substantially less than 19000 rpm with any reasonable inserted end mill, but I didn't want to spend $200, since the Internet comments were kind of negative.
 

mattthemuppet2

Active Member
Active Member
Joined
Sep 28, 2013
Messages
1,525
Likes
750
#15
personally, for small mills I would suggest getting a couple of cobalt roughing end mills in 1/4 and 3/8 sizes, then a couple of 1/4 3 flute carbide end mills. Rough out the parts with the roughers, then finish with the carbide at a higher rpm. That will cover almost all materials, the roughers will take a beating and still keep going and your carbide end mills will last longer. If you look on Amazon every so often, they have tools heavily discounted for the last one, typically as add on items. I've bought a whole bunch of taps, end mills and the like (including a beautiful 1/2in 3 flute Morse rougher) for around $5-7 each. Real quality tooling for Chinese prices. Latest find was a Mit 10-13mm hole guage for $8 posted.

Now face mills on the other hand really lend themselves to carbide. A cheap 2in 4 flute face mill and some alu specific inserts off eBay should do a lovely job. I have one high on my list :)
 

Grandpop

Active Member
Active Member
Joined
Jan 20, 2016
Messages
45
Likes
42
#16
I have an 80's 8 x 26 MSC knee mill. I have an old set of 1" dia Valenite Mini-Mills that are similar to the Shars Little Hogger sets. The Valenite 90 degree tool is my favorite and used most every time I make something. Unfortunately it uses (2) 5/16 IC triangle negative inserts, but they can still be bought on ebay easy enough. The 45 degree chamfer tool is also used a lot (3/8 square inserts).

I also have the same set in 1.5 diameter sizes, but they worked great on a Bridgeport but not too well on my little mill.

I liked the little 1" ones much that I made a 5/8 and 3/4 diameter set of 90 and 45 cutters by copying the Valenite design that uses the same inserts, but just one insert each. They work well on the little mill for steels at 1700 rpm. I run same speed for aluminum and works good for that as well, despite not being "correct" speed.
 
[6]
[5] [7]