sandvik metal scraper

[anthonycosier37]

how to sharpen the blank that comes with 20mm h10 carbide for metal scraping as i am a newbie to the art

 

[hvnlymachining]

Several great videos online about it. My Sandviks came pre sharpened.

 

[Joe Gwinn]

how to sharpen the blank that comes with 20mm h10 carbide for metal scraping as i am a newbie to the art

Make and model?

Also, please enter your geographic location in your user profile such that it appears below your name at the left of postings.

 

[Joe Gwinn]

Several great videos online about it. My Sandviks came pre sharpened.

Aren't these intended for scraping wood?

 

[hvnlymachining]

Sandviks also sells carbide insert machine scrapers

 

[4GSR]

The 20mm is the width of the blade and H10 is the grade of the carbide. In this case, it's C-2 grade carbide for scraping cast iron.

This is the insert used in the Sandvik hand scraper and holders for the Biax scraper for those that like to use it on the power scraper.

 

[Richard King]

We discussed this in the Machine Reconditioning forum a few times.
Here is one from 2015:

Sandvik Scrapers Blades

The Sandvik blades come in 30mm, 25mm, and 20mm but I cannot find reference to the radius on the blade, does anybody know?

www.practicalmachinist.com

 

[anthonycosier37]

sandvik 620-20 H10 20mm blade

 

[L Vanice]

Short answer is use a diamond grinding wheel with a flat face.

I most like my Glendo Accu- Finish Series I grinder. I also have a Baldor carbide grinder and a Leonard Grinder-Lap. These are all expensive industrial quality metalworking tools, but you might find a deal on a used one.

Cheapest way I know is a Chinese 6" thin steel disc with electro plated diamond in many grit sizes, sold on eBay for $13.50 with free shipping from KY.

6'' inch Diamond Lap Disk Grinding Disc 1/2 inch Arbor Hole For Gemstone Jewelry | eBay

Arbor hole : 12.7mm (close to 1/2" ). Suitable to grinding gemstone, jewelry, glass, rock, carving knife, etc…. Diamond coating surface area : almost 95%,only one side is coated diamond. Diamond coating Density : Perfectly high.

www.ebay.com

These disks fit the Work Sharp 3000 grinder, which is comparatively inexpensive and is also very nice for sharpening woodworking tools.

https://www.amazon.com/Work-Sharp-WS3000-Wood-Sharpener/dp/B000PVHIMW/ref=sr_1_7?crid=Q1FBFUAG4120&keywords=chisel+sharpener&qid=1673827690&sprefix=chisel+sharpener%2Caps%2C126&sr=8-7

Or you can build your own grinder.

Larry

 

[anthonycosier37]

what sort of rake and radius

 

[L Vanice]

Negative and depends on what and how you want to scrape. But those are big tools for big open areas, not for little dovetails and tight places.

Larry

 

[johnoder]

Wonderful tools. The diamond grit needs to be capable of mirror finishes on the scraper blade. Else wise you are making versions of a plowed field

 

[anthonycosier37]

is there a certain degree of rake for moore scraping a flat surface plate

 

[Richard King]

neg 5 deg rake with a 60 mm to 90 mm radius of a circle....or a 2" to 3 1/2" circle. Thanks Miland

 

[anthonycosier37]

ok thanks

 

[anthonycosier37]

my metal scraper is only 20mm how could i put a 60 to 90mm radius

 

[Milland]

my metal scraper is only 20mm how could i put a 60 to 90mm radius

It's an arc segment, not a tangential radius.

 

[Richard King]

Sanvik hand scraper

 

[Richard King]

Biax Radius gage is 3rd one down. The middle 1" square is for counting points per inch PPI.

The radius's are 60mm, 90mm, and 140 mm.

Accessories & Aids for Biax Power Scrapers | DAPRA Corporation

www.dapra.com

 

[anthonycosier37]

thank you so much where did you get sandvik scraper data from