12-02-2017, 01:33 PM
(12-02-2017, 06:41 AM)SteveG Wrote: I know the scraper definitely needs a radius on the cutting edge as its pretty much straight now.
Steve
And a double bevel on the front face. (Gives you 2 edges to scrape with.)
Your scraper looks good Steve! But looks don't mean anything to the part you are scraping. My first scraper was an old file (curved tooth) that I ground the teeth off of and radiused the end. It worked but a sharp edge didn't last very long.
I copied an idea for a powered lapping tool from someone on another forum and added some of my own features. Easy to make with simple construction with a wood 'tool post' that has the bevel angle for the blade cut into the top of the post already. The swinging 'ladder' was my idea for doing different radius' on the cutting blades. I did the same thing on my carbide grinder for roughing out the radius and the bevel angle. A slice of round cast iron for the lap, and some 10 micron diamond paste puts a mirror finish and a razor edge on a piece of carbide.
Willie