Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 15 of 15
-
3rd April 2015, 08:01 PM #1Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
Carbide turning tools - need help
Hi brains trust!
I've been given a job to turn a stiletto handle for a WW2 knife. The blank was prepared using sheoak and a material called G10.
G10 is a fibrous matt-like material, impregnated with an incredibly hard resin and baked. Its an awesome looking material, but cutting it with HSS should be regarded as impossible.
The sharpest points and sharpest edges barely touch it. However, confusingly, it sands readily.
I cannot fathom this dichotomy.
After very careful and truly sharp edges on the HSS chisels touch the blank, it does... nothing. Nothing other than blunting the tool! Files are virtually useless.
Im hoping a carbide cutter might be better.
Does anyone know where I can get a carbide cutter mounted on a chisel at short notice? I've looked at the forum sponsors and I'd be buggered if I can find them there.
-
3rd April 2015 08:01 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
3rd April 2015, 08:21 PM #2
Here is one option
http://www.timberbits.com/robert-sor...r-handled.html
-
3rd April 2015, 09:07 PM #3Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
-
3rd April 2015, 09:07 PM #4GOLD MEMBER
- Join Date
- May 2011
- Location
- Albury
- Posts
- 3,040
Don't you dare take to this material on your router table with that new bit!
-
3rd April 2015, 09:25 PM #5Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
Aldav, I promised to flog it - and flog it I will. My mate is a physicist at the ANU (Ilya) and even he won't believe the universe bending torments I'll be subjecting it to
-
3rd April 2015, 09:33 PM #6
Try scraping it, some of the hard western timber that is hopeless with a cutting tool scrapes beautifully.
Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
-
4th April 2015, 12:50 PM #7
Ev did you order a turn master? Would be great to see in action. Wonder what sort of finish I'd get. On acrylic pens with these type of cutters
Sent from my iPad using Tapatalk
-
5th April 2015, 12:18 PM #8Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
I sure did. Hopefully they'll post Tuesday. It's for the stiletto that Matt is making for the Melbourne Knife-Fest, so I'll want to do my most handsome work.
Remember that time when we were noodling on your lathe with that black acrylic? BOOM! Bits everywhere!
I read some things about carbide cutters that don't make a lot of sense, but I'll repeat what I "know"... But they do run contrary to my experience...
-- HSS is sharper and will cut almost anything
-- carbide wont cut as well as HSS
My experience so far is that carbide is magical. My router bits and the new cutters for the thicknesses are fracking AWESOME. I'm thinking that the G10 composite can't be touched by the HSS, then the carbide surely has to cut it. The G10 absolutely kills the edge on the HSS instantly.
I'd also recon it has to be awesome for your acrylic pens too.
-
5th April 2015, 01:29 PM #9
Evan, carbide scrapers have their place in society. With the Turnmaster, you can set the angle of the scraper to 45° and shear scrape for a better finish off the tool.
The G10 material sound interesting. Maybe cutting on a Bandsaw to octagonal shape might help minimise the chance of a blow out.Pat
Work is a necessary evil to be avoided. Mark Twain
-
5th April 2015, 05:40 PM #10Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
Pat, I committed the most egregious of wood turning sins... Sandpaper!
I grabbed the Festool Rotex, put in a fresh 50 grit Rubin disk and cranked it to high. The DC snugged right close to catch the lung cancer dust and ground that mongrel to shape.
Now what's needed is detail I'm hoping the diamond point of that Sorby Carbide does the job...
I will say, that this little stabber is going to be classy
-
5th April 2015, 05:54 PM #11
Evan, sometimes it takes the 60# gouge to make progress.
Post a pic of the finished product and I'll compare it to my Sykes Fairbairn KnifePat
Work is a necessary evil to be avoided. Mark Twain
-
5th April 2015, 08:53 PM #12
I turned up a new shifter nob for my car out of Bakelite (fine cloth weave layered) and cutting it blunted my bandsaw and HSS tools where useless. My Vermec tungsten hollowing tool was all I used to shape it and even that was slow work. Sanded beautifully though!
-
5th April 2015, 10:22 PM #13Retired
- Join Date
- May 2012
- Location
- Canberra
- Posts
- 1,820
Pat, it is a Sykes Fairburn stiletto. it isn't mine but Matts. Matt is a member here, I think that's how we first met.
He's a tallented knife maker. The ones he has shown me are incredible.
I'm not sure for the reason for the G10, but I can speculate its to replicate the original handles. It's a pretty interesting story, there is a very considerable amount of research on another forum.
Matts idea is make a very fancy box and have it for the knife show.
It's been a very interesting turning job. It's been a pleasure to do due to the history.
-
5th April 2015, 11:33 PM #14
Evanism, I have turned some very hard, abrasive timbers. as Cliff suggested, scraping may work better than a cutting technique. Also try slowing the speed down, that works for timbers that have a high level of silica that blunts tools quickly.
JimSometimes in the daily challenges that life gives us, we miss what is really important...
-
8th April 2015, 12:42 PM #15
Sounds a bit like woven bamboo. I made a couple of pens and it was horrible to cut. I think I ended up using a scraper and sanding paper to finish.
Similar Threads
-
Carbide tip Turning Tools
By Mulgabill in forum WOODTURNING - GENERALReplies: 4Last Post: 17th December 2011, 04:29 PM -
carbide turning tools site
By hughie in forum WOODTURNING - GENERALReplies: 9Last Post: 3rd August 2010, 02:38 PM -
Carbide insert turning tools - another supplier
By Sawdust Maker in forum WOODTURNING - GENERALReplies: 8Last Post: 5th March 2010, 08:03 PM -
Carbide Wood Turning Tools
By carbidetools in forum WOODTURNING - GENERALReplies: 16Last Post: 5th March 2010, 10:35 AM