Thread: Carbide tips for DIY ex USA

Just about all the listed cutters in this thread are for metal. The up turned lip would have a small radius on it . But if one had a decent diamond polishing burr etc the edge could be touched up to produce a much sharper edge.

There are deep cup type for metal machining, used allot in the manufacture of extrusion dies etc. I am not sure who the manufacturer is, but they would be very easily converted to wood usage. I have a couple of partially worn ones that I intend to a go at sometime.

Putting all this aside I have had good success with HCS Higher Carbon Steel. The Leady cup cutter is made from HCS. I think all a matter of what you intend to use the cutter for, for me Oland type grind is what I use for roughing and it can be out TCT, Carbide, cobalt etc. I really hammer the edges with use and sometimes grind a positive rake to the top and then roll it over in a semi shear scrape if its a bit too aggressive.

Roughing out for me is bulk removal, no finesse, just hog it out.

OK, they should arrive in about one week. Bought 25 for US$85.50, that is about A$4 each. Any bulk order later on, if they work, would bring the cost under A$2. Until they realise they have a new huge market and increase the price.

I'd be interested in trying a couple F&E. If they're roughly the same size and bevel angle as the Ci0 it should only be a matter of getting a good edge up with a diamond hone (in theory ). Even bought some stainless square bar while I was way down south in readiness for just such an opportunity

Originally Posted by TTIT

I'd be interested in trying a couple F&E. If they're roughly the same size and bevel angle as the Ci0 it should only be a matter of getting a good edge up with a diamond hone (in theory ). Even bought some stainless square bar while I was way down south in readiness for just such an opportunity

No worries, if they get here they will get there . Given that they are round, sharpening should be easy with the technique hughie (IIRC?) recommended for rounding the screw's edge, revolving it with a hand drill against the grinder wheel diamond hone.

I have kept one square bar in readiness also, and a round bar for a deep hollower.

Originally Posted by hughie

most if not all are for metal and you have to sharpen up the edge for fine work. But for roughing they should do fine. Found a site for round wood cutters but lost it . Plenty available in HSS tho'

might be the answer, look for Double Back Out Knife

Quick-Lock Profile Knives - Global Tooling

Hughie,

These look promising.
Have sent email to them to find out the dimensions. Will let you know. Only thing is that they cost $us9.00 each but then cheaper than $us17.00 each

Originally Posted by WOODbTURNER

Hughie,

These look promising.
Have sent email to them to find out the dimensions. Will let you know. Only thing is that they cost .00 each but then cheaper than .00 each

Which, again, raises the question: C3 is C3 is C3 and this crowd is overcharging or C3 is not.... and I am getting duds? You brought them up last time, does this mean that you have excluded Carbide Depot for some reason? The ones I am getting are 12mm diametre, BTW, the 10mm ones (Vermec type) would be too small for a 12mm bar.

Originally Posted by Frank&Earnest

-------- You brought them up last time, does this mean that you have excluded Carbide Depot for some reason? The ones I am getting are 12mm diametre, BTW, the 10mm ones (Vermec type) would be too small for a 12mm bar.

F&E,
By no means! I'm just fishing around like everyone else to find the right ones. These ones (Round inserts) look like round versions of the square inserts for cutting wood plus they're made for wood.

No worries, if they get here they will get there . Given that they are round, sharpening should be easy with the technique hughie (IIRC?) recommended for rounding the screw's edge, revolving it with a hand drill against the grinder wheel diamond hone.

F&E, Had a look at the site and the round cutters. They look a great deal like the ones being sold in the US for wood turners, Hunter tools I think the name is. If so, then, they would not need any sharpening.
But If you do intend to sharpen them, then remember that the Silicon Carbide grinding wheel (the green one) is very coarse and wont really produce a fine edge. I go over mine TCT with a diamond file/hone. A diamond hone etc is way cheaper than anything else as I suspect you would need a wheel around 400 grit to get the fine edge

I would be interested in a couple if theres any on offer.

Originally Posted by WOODbTURNER

Hughie,

These look promising.
Have sent email to them to find out the dimensions. Will let you know. Only thing is that they cost .00 each but then cheaper than .00 each

I think you get a pair of those round carbide Double Back Out Knives for US$9, so that's takes it down to US$4.50 ea.,before postage. They also have a Torx screw to match for an extra US$1. So, just a bit more than the ones that Frank is getting from Carbide Depot, but perhaps worth getting a small batch of those as well so they can be compared. It would be interesting to try out a carbide cutter with a negative rake.

Should you proceed with a pilot batch order, WOODbTURNER, I would be interested in a few, depending on the size. They would need to be at least 12mm diam for my purposes.

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Originally Posted by hughie

F&E, Had a look at the site and the round cutters. They look a great deal like the ones being sold in the US for wood turners, Hunter tools I think the name is. If so, then, they would not need any sharpening.
But If you do intend to sharpen them, then remember that the Silicon Carbide grinding wheel (the green one) is very coarse and wont really produce a fine edge. I go over mine TCT with a diamond file/hone. A diamond hone etc is way cheaper than anything else as I suspect you would need a wheel around 400 grit to get the fine edge

I would be interested in a couple if theres any on offer.

Yep, you mentioned that before, that's why I crossed out the wheel. When I get them we'll work out how to spread them. Ditto with you woodbturner, I second Neil's motion.

Originally Posted by NeilS

.............Should you proceed with a pilot batch order, WOODbTURNER, I would be interested in a few, depending on the size. They would need to be at least 12mm diam for my purposes.

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Ditto for moi!

Have sent email to them to find out the dimensions. Will let you know. Only thing is that they cost .00 each but then cheaper than .00 each

Keep me posted, hassle em over shipping ask for ordinary mail otherwise they like to courier everything every where.

Just got a reply re cutters.
They do cost $us9.00 each (single) and are 11mm dia x 7mm high and 5.1mm hole.
I reckon they're too small for my 12mm square stainless bars that I bought unless I grind the end to suit.. Any ideas out there?
F&E, if the cutters you are getting are shaped like the Hunter one with a lip, you will have to use it on an angle as in a shear cut as it will dig in if used flat. Let me know if I'm wrong.

Originally Posted by WOODbTURNER

Just got a reply re cutters.
They do cost .00 each (single) and are 11mm dia x 7mm high and 5.1mm hole.
I reckon they're too small for my 12mm square stainless bars that I bought unless I grind the end to suit.. Any ideas out there?
F&E, if the cutters you are getting are shaped like the Hunter one with a lip, you will have to use it on an angle as in a shear cut as it will dig in if used flat. Let me know if I'm wrong.

Reckon they are getting a bit too expensive compared to the ones Frank is getting in from US and starting to be a bit on the small size. Personally I wouldn't bother modifying 1/2in bar if you can get a 12mm or larger.

As for the profile, the Woodcut cup hollowing tool has that profile so anyone who has used that could comment on how it does the job.

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