Thread: Source for Metal Scrapers

The only supplier in Oz is Sandvik Coromant.. Part number for the handpiece which comes with one indexable carbide insert is 620-25 H10

The inserts are 620-2525

Costs would approx be about $50 per insert and maybe $80-100 for the handpiece with insert...

I get get some pictures of mine shortly..

Some pictures.. This is for cast iron scraping for machine tool alignment.. Of course to go with this you need a surface plate and some marking medium and a way to sharpen the carbide, which means a diamond lap..

Why not make one.
One way to get a carbide scraper is to braze a big carbide insert onto a bit of flatbar. put a handle on the end. Getting a large insert might be a problem but if there is a heavy machine shop nearby you might be able to pick up a used one cheap.
I have one I made back in the early 1980's. Its actually an Eclipse high carbon scraper that I brazed a 25mm squre insert onto the end of. At the time I was working in the power gen industry and we were doing a major rehab on one of the turbines. Doing a lot of scraping to get scale of the turbine case joints and also a lot of pipe flanges as well. Not exactly high precision scraping but a lot of it. The std high carbon scraper needed resharpening several times a day. I managed to get the boss of the machine shop on a good day and talked him into giving me the big insert. I still use the scraper on occasions, Have only had to sharpen it about 5 times in the last 20 years. One thing to watch with a carbide scraper is it can be very easy to take off too much or score the surface. Probably not an issue if you haven't done much scraping before using a high carbon scraper.
You could even make one using an old file, wouldn't stay as sharp as a carbide for as long but could still scrape steel with it. Or weld a bit of HSS to your flat bar.
I wouldn't be paying $130 for one.
Thinking about it I just realised I haven't really done much precision scraping of flat surfaces, but I've done quite a lot of white metal bearings years ago using bearing blue and lead wire. I'd have to have a practise for a while now though LOL.

bollie7

Yeah, making one is easy. I made mine as an apprentice in the 60's from an old 10" (I think) flat file smoothed and tapered thinner to the end, and silver soldered a 1/4" x 3/32" x 1" long carbide tip to the end.

I ground and lapped the end to a slight curve, and it never seems to need sharpening.

Getting the carbide tip these days could be the problem.


Maybe just buy the tip from Sandvik, and s/solder to an old file?

Originally Posted by SlotBaker

Getting the carbide tip these days could be the problem.

Might almost be worth buying a cheap chinese router cutter or even a solid end mill to get the carbide. Unless you are really going to do a lot of scraping, carbide probably isn't worth the effort anyway. Bit of HSS parting blade weld to flatbar would be ok. or as you say, even an old file. I even have scrapers made from old, all hard, power hacksaw blades.

bollie7

If its any use to you I have some carbide pieces 1" long 5/8" wide .100" thick.

HI,
Only one source for Scapers in OZ ?, unless I found the Wrong type try these OZ Suppliers: Engineer's Scraper | Blackwoods and http://wic043u.server-secure.com/vs4....asp?q=scraper . I am sure if you ask around Engineering Suppliers there will be other Brands available. Or even try Googling 'engineers scraper' or bearing scraper' and You might find other sources. As the others have said You can make your own Scraper ie from old Files. I have seen something about the latter in a past issue of 'Model Engineers Workshop Magazine'.
All The Best steran50 Stewart

The shortest way to do many things is to do only one thing at once.

Thanks guys

Eskimo, PM me your address. If you decide to go the homemade route I'll post you a 1" square piece of carbide which you can silver solder onto a file shaped piece of mild steel. (Or you can grind the teeth off an old file. Personally I don't like using files as they can break.

I would never use a sharpened file for scraping as it would only last a minute or so between sharpenings. A carbide tip will last an hour or so. You can get cheap 5 or 6" diamond wheels from Chinese ebay sellers that do a good job. Use a short block of wood for a grinding rest. Crosscut it at a 5 degree angle and sharpen the scraper on each side so that you get two working surfaces.

You will also need a lapping wheel, perhaps made from a dumbbell weight machined smooth. You can charge this with diamond lapping paste to hone the carbide. This is a necessary step. (again chinese ebay for cheap).

I have both the Sandvik and homemade versions. They both work as long as you take a couple of minutes to ensure the edges are sharp and nick free.

Greg

Thanks Greg, but Blackwoods had what I wanted.....

Good then. Did they have a carbide tipped scraper or were they all HSS?

Greg

mmm didnt check...gee i am wally sometimes
will go down to the shed and check...err what do I look for...they are the eclipes ones?

make that most times ...sometimes

Just stumbled across this thread, as I'm interested in carbide tip scraping of handplane soles.

The price for the Sandvik Coromant plus spare bit from the local Totaltools is $180

Greg, if your offer is a bit is still open it would be very welcome.

I got some carbide to make good on a promise of same to two other guys. I it on a private deal with another member on Practicalmachinst.com (I think I paid a buck each for 10).

So here's the deal: First five get a piece gratis, but the shipping might not be tomorrow. Send address details to my PM or email.

If anyone has a suitable steel blank I'll even braze it on and sharpen/hone it, but you'll have to cover postage both ways.

Greg