Thanks: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 91 to 98 of 98
Thread: Diamond Tool Holder
-
8th July 2013, 05:29 PM #91Senior Member
- Join Date
- Mar 2009
- Location
- Melbourne
- Age
- 54
- Posts
- 380
Sorry for going a bit off topic but I was just wondering if Bryan had a copy of the Milling speeds nomogram he could post?
They had these posted around the workshop when I was going to tafe but they never had any copies. I took photos of them but they came out fairly ordinary.
I really like these charts but was never able to find them anywhere so I'd be eternally grateful for a copy or info on what book you found them in.
Back on topic, Keith Fenner has a three part youtube clip on getting an import grinder up to spec which is interesting to watch:
There must be a lesson in here somewhere! Part 1 - YouTube
Cheers,
Greg.
-
8th July 2013 05:29 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
8th July 2013, 06:10 PM #92Distracted Member
- Join Date
- May 2010
- Location
- Lower Lakes SA
- Age
- 58
- Posts
- 2,557
Greg, I'm guessing the missing word is 'bigger'? The one I posted should come up quite large. In my browser I can keep clicking on it and it will blow up. Anyway try a right click and save as, then see how it looks in your preferred image viewer. If you have no joy I can email you a copy.
Oh wait, I just re-read your post and the missing word - from my comprehension - was 'milling'. The answer is yes I have it in the book but not scanned as yet. Things are a little crazy around here but I will see if I can scan it for you. Soon.
-
9th July 2013, 12:01 AM #93Senior Member
- Join Date
- Mar 2009
- Location
- Melbourne
- Age
- 54
- Posts
- 380
-
11th July 2013, 10:28 PM #94SENIOR MEMBER
- Join Date
- Oct 2011
- Location
- sydney
- Posts
- 880
Hi,
I've done so more cutting with the DTH using both standard HSS and Crobalt HSS.
I used the Crobalt on the bright bar following Gary's suggestions, the biggest DOC was 1.5mm, anything more than that was too scary on my little Hercus. I'm happy enough with that, even with a carbide insert tool I don't really go much bigger.
I'm still not getting a big DOC with the HSS, from memory the biggest was about .5mm but the finish is really good.
I turned up a brass mortar barrel tonight using the HSS and DTH, and it came up really nice. So overall I'm happy with my purchase so far.
Ben.
I'm now thinking maybe I should get a bigger lathe, like that Harrison on ebay and gumtree...
-
11th July 2013, 11:15 PM #95GOLD MEMBER
- Join Date
- Nov 2007
- Location
- melbourne australia
- Posts
- 2,648
Ben,
Glad you like the DTH. Just to clarify, Crobalt is not HSS. There is Cobalt HSS. Crobalt (with a r) is an alloy that does not contain any iron.
http://www.crobaltusa.com/whatiscrobalt.htm
Cheers,
Chris
-
12th July 2013, 07:23 AM #96SENIOR MEMBER
- Join Date
- Oct 2011
- Location
- sydney
- Posts
- 880
Hi Chris,
Thanks for that, I had a look but couldn't find anything about Crobolt. I didn't try CroboltUSA though. Good site. It does work much better than HSS. I knew there was a difference between HSS Cobalt and Crobolt but I did think Crobolt was still HSS.
Cheers Ben.
-
30th December 2013, 05:28 PM #97SENIOR MEMBER
- Join Date
- Oct 2011
- Location
- sydney
- Posts
- 880
Hi,
Thought I'd quickly post these pictures of some black bar I turned up today.
I think the biggest cut was 1.2mm off the Diam at roughly 720 rpm. The DTH with Crobolt finish is nearest the headstock and carbide cut is on the right. Probably hard to tell but the DTH has much smoother finish, still comes out greyish with wavy lines but a lot better than the carbide (which i used to remove the hard scale). Also, the tip hasn't been sharpened for awhile.
Ben
-
1st January 2014, 01:46 AM #98
Hi Ben,
What Dia is the bar? I'm guessing 20-25mm? It looks to me like your surface speed with the carbide tool was too low, i generally push carbide at 400fpm (higher for finishing cuts) for a 1" bar thats 1600rpm. Probably higher then the hercus will go but carbide loves speed.....
The DTH cuut looks good, i keep telling myself i will buy one but other things always seem to crop up.
Ew1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
Similar Threads
-
tool holder id
By azzrock in forum METALWORK FORUMReplies: 10Last Post: 8th December 2011, 03:25 PM -
Diamond Tool Holders - AGAIN
By eskimo in forum METALWORK FORUMReplies: 9Last Post: 3rd October 2011, 11:51 PM -
Diamond Tool Holder
By Stustoys in forum METALWORK FORUMReplies: 151Last Post: 15th September 2011, 01:57 PM -
tool holder
By glenn k in forum THE HERCUS AREAReplies: 5Last Post: 17th April 2009, 03:50 PM -
Diamond tool holder
By Pete F in forum THE HERCUS AREAReplies: 22Last Post: 9th December 2008, 08:27 PM