A left-hand rounded scraper is used to finish the inside of a workpiece such as a bowl.
What is a scraper?
Scrapers are finishing chisels for end wood. They are often used to remove the unevennesses that remain after using other woodturning tools. Scrapers take small amounts of wood from the workpiece. They come in different shapes and thicknesses so you can choose the right one depending on the shape and depth your workpiece. An advantage of the thicker (extra heavy) scrapers is that they absorb vibrations better. You can make a scraper cut by putting a burr on it. We recommend putting a light oil on the steel when not in use to keep it in perfect condition.
It has long been understood that by subjecting metal tools to elevated temperatures and then rapidly cooling them, the properties of the metal can be altered. This happens because the crystal structure of the metal is altered to change the way the metal reacts when in use.
The two main crystals in tooling steel are the larger and softer austenite and the smaller, more stable martensite. Through heat treatment, we look to transform the austenite to marten site to produce steel with good wear characteristics and an amount of ductile properties.
When combined with a good quality heat treatment, the cryogenic process greatly enhances the austenic transformation. Also at these extreme temperature of -185 C°, fine ‘eta’ carbides are formed within the carbon structure. Growing very slowly and only at these very low temperatures, eta carbides are extremely small and act as a filler between the other crystals in the metal.
The combined effect of the cryogenic processing is to produce a refined crystal structure in your hand tool that will give a lifetimes service by producing a blade that will retain its edge longer and give a superior ‘feel’ in use.
Properties
- CRO-2565KW
- Crown
- 2022020015930
- 25 mm
- 165 mm
- 525 mm
- Cryo
