Tools help - buying advice

[Highpower]

  +1

[EdK]

A cut knurler is on my long list of projects.

Ed

[svk]

Hi, finding good machine tools in Norway for a reasonable cost is like finding a whale in the desert. The industri are higly proffesional
and the market is not really for us home shop guys. There are a couple of companies like gasolin.no and maskinbutikken.no but it 
is mostly far east stuff.
Ironman, where are you living? I am on the border of Nordland/ Troms. Pm me if you like.

If you cant wait for Toms tutorial, you can look on the net for a scissor type knurling tool, dont buy the push in types as its designed for 
heavy lathes.

oh..my first post here..guess I should post on in the new member area 

[Mayhem]

(11-14-2014, 07:21 AM)svk Wrote: Hi, finding good machine tools in Norway for a reasonable cost is like finding a whale in the desert...

I think Norway must be like Australia then (well at least Perth).

I spend some time in Gothenburg, Sweden each year and I'd love an excuse to visit Norway...

[stevec]

Ironman, just a word or 2 further on what Tom wrote. Grinding wheels for your needs are more important than the grinder itself. White Aluminum oxide is the best choice for HSS. When and if you start using carbide tools a diamond wheel, although more expensive than AO, is the best choice.

  

[ironman]

Thanks for all the great input! I wait for Toms vids :)
In the meantime i will practice on other things. A friend just come by and showed me some stuff, and he really made nice cuts with my lathe compared to the ones i have made. I made okey ones, but he made it look all clean. (He has lots of practice though).

Svk: i live just north of Oslo, so you are far away from me. But nice to see more Norwegian in here :)

[arvidj]

(11-14-2014, 04:58 AM)Mayhem Wrote:

(11-13-2014, 09:41 PM)PixMan Wrote: I'm looking forward to seeing what your knurling tool looks like Tom...

[ironman]

Im looking around for tool bit holders. Are there different sizes on the bits itself?
The ones i have today is from KOMET. Here are some of the numbers that are on the boxes:
P1-R-P25
P1-K20 N
P1-L-P25

What does the numbers say?

[DaveH]

(11-14-2014, 10:03 AM)ironman Wrote: Im looking around for tool bit holders. Are there different sizes on the bits itself?
The ones i have today is from KOMET. Here are some of the numbers that are on the boxes:
P1-R-P25
P1-K20 N
P1-L-P25

What does the numbers say?

Ironman,

I think - (I only think) those numbers refer only to the type of carbide and the material they are designed to cut. ie P25 for steel (turning), the carbide is a medium toughness and medium wear resistance.
Now P25M is the same as above but for Milling.
K20 N for cast iron the N, I have no idea.
There web site should give more info.

This is where it all goes to pot and becomes complicated and I can explain why.   Most if not all inserts are made to machine to a specific purpose - whether it is  material types, types of cut and so on. The inserts companies make them for industry and for industrial use not for hobbyists however this does not mean we cannot use them, we can provided we choose the correct insert suited to our purpose.
As hobbyists TIME isn't a major concern regarding the manufacturing process nor is taking massive depths of cuts. So choosing an insert that is capable of taking 3mm depth of cut, will probably give a rubbish finish when trying to take a couple of cuts of a few thou finishing cuts. (Might not want to cut at all )

There are trade offs with hardness, toughness, how sharp the cutting edge is, wear resistance these parameters seem to work against each other nevertheless if we choose the inserts with care, we as hobbyists can nearly get a "general use" insert. The development of inserts is on going and they seem to improve every day and over the last 15 years I have seen a vast improvement.

Just to say I only use ISO inserts (and holders) the main reason I can buy inserts to fit my holder from most insert manufacturers and I am not tied down to a specific manufacturer.

There is a start.


DaveH