Resharpening Rebate Block Knives With A Diamond Stone?

[pollys13]

Is it possible to resharpen the Tungsten Carbide knives in a rebate block with one of these?

https://www.ffx.co.uk/tools/product/Fai ... ne-4-Sided

If yes, suggested method please?
Cheers.

 

[Trevanion]

Short answer: Yes.

Long Answer: While it would work it would never come anywhere close to being as sharp as a set of new carbides. There's only so much cutter projection with a rebate block so you can't sharpen too much otherwise you'll not have enough cutter left. You'd also probably struggle to sharpen it using one of those blocks in particular because of the holes in the plates, they are an absolute nightmare for catching the edge of a chisel. Ideally, a diamond plate would best suit the task and just rub the back of the knives on the plate a few times and it should give you a slightly keener edge.

In my opinion, it's not worth the effort because if all goes well and I don't chip them all up they will last a long time anyway (About a year or so for a full set) and more than paid for themselves. But if you don't fancy spending £15 each time on a full change over of carbides and want to scrape the most life out of them as possible, all the power to you.

 

[pollys13]

Hi thanks,
I ask because I have an Axminster tilting spindle moulder. One customer reviewer, said along the lines of, tilting spindle was a good sales point but in practice seems he had problems in repeatability of cut and accuracy. I haven't been able to check if all OK on my spindle.
It might be the reviewer just couldn't be pineappled to set it up properly, tweak it, spend a bit of time on it.

I saw a 9 degree cill block on Ebay I won the auction, half the price of new. I was thinking if the tilt on my spindle is going to be problematic, a new cill block is around £400.Looking on Ebay I found cill blocks only come up now and again. I thought was best to go for it, cover myself as if the spindle tilt does actually work fine then could sell the cill block on at minimal, acceptable loss.
Then again, it is quite a pretty chunk of metal I might actually keep as might come in handy for other stuff and could I think make window cill in one go, instead of sub plant on cill.
Cill bore was was 1-1/4" so had to get a set of top hats to reduce to 30mm.


Cill at the moment is soaking in a 2.5 litre Screwfix paint kettle with 2 litres of Wilko White Spirit


I have spurs for my rebate block which I believe will fit on the cill block. The 4 knives on the cill block I think are a bit blunt and two have a nick at bottom on one side of reversible blade. The price for a new set of knives is around £64 which I would prefer not to pay if I can clean up the knives to an acceptable edge.

To have a try at doing this does a diamond stone, or perhaps a set need to be really expensive?
I have some whetstones and flatting stone, not suitable for Carbide, be at it all day?
Cheers.

 

[ColeyS1]

You don't need a 9 degree cill block. I change my rebate cutters about once every 18months after medium/heavy use. I wished you lived closer, enjoyed cider,and we're happy to let me have a blast on all your tools !

Sent from my SM-G900F using Tapatalk

 

[Trevanion]

I have some whetstones and flatting stone, not suitable for Carbide, be at it all day?
Cheers.

Some of the old oilstones can cut carbide a little as they were sometimes silicone carbide which will just about lick it. Old Green Crystolon stones are just as good as diamond for cutting carbide.

 

[Mike Jordan]

I suggest you have a look at the Appleby Woodturning site, they are very competative on TCT inserts. The ones I buy are half the price of the Axminster version.

 

[Eric The Viking]

I see you're in Swindon. If you have cause to come down to Bristol, there's a branch of Leitz Tooling here, where I get my TCT sawblades done, but they also sharpen planer knives and a range of other things.

They are very good, and helpful. You will probably find they can regrind them without losing too much meat: Unit 3/Ferry Steps Trading Est/Albert Rd, Bristol BS2 0XW. That's just off the A4 Bath Rd., the other side of the New Cut (runs alongside), near Temple Meads station. There might be a branch closer to you, too.

HTH,

E.

 

[pollys13]

OK thanks people.