Hand Scraping

This page was last updated on Monday, September 05, 2016

Just getting started on something new, or old, depending on how you look at it. I guess it is an old art, but it is new to me. Power scraping is a subject of its own and will not be covered here.

I am lucky enough to have a friend who made the acquaintance of a retired machine rebuilder. The question was raised if anyone was interested in forming a club to learn hand scraping and how to fix geometry errors as well. The members get to learn how to scrape, and the teacher gets a milling machine rebuilt for him by the club members in return. Not a bad deal if you ask me!

This page will describe the basics of hand scraping. It is not meant to be an educational piece but some information can be gleaned from it.

 

Types of Scrapers and Blades

It is important to note that there are different types of scrapers and blades. The scraper handle must have a bit of flex in it, but not too much. Most of the flex is actually in the blade itself, and the amount of flex can be controlled by how far the blade extends from the handle.

There are two basic kinds of blades: High Speed Steel and Carbide. They both have their uses. More on that later.

 

Scraper Sharpening

Our first step is to learn how to properly sharpen our scrapers. One of the members was able to supply us all with some wonderful gauges that were laser cut from sheet steel. The gauge is used to get the proper radius on the blade for the type of work that it will do. Once the proper radius is ground, the blade is finish sharpened on a regular sharpening stone.

TO BE CONTINUED...