Wednesday, December 31, 2008

Diamond grinding wheels

Industrial diamonds are not suitable for gemstones and are called bort, the diamond powder used in grinding wheels maybe synthetic or mined. Diamond powder is used for grinding wheels because of their hardness and heat conductivity; they quickly cut the hard steel with out generating a lot of heat.

Diamond grinding wheels use diamonds as an abrasive to grind extremely hard materials. Industrial diamonds are ground into a powder for use in grinding and polishing applications, this diamond powder is mixed with a resin bond to create a layer of diamonds and bonder on a metal core to sharpen hardened scissors, these scissors are heat treated and run from 54 to 62 HRC, hardness Rockwell C scale. Diamonds may be plated to a wheel core, they tend to be a course diamond, these type of wheels are not good when you have to remove a lot of metal, they are slower to cut and the blade gets to hot so that you can't touch it.

This picture shows sharpening hardend beauty shears blade on Diamond resin bond wheel. This wheel shown is 800 grit.

More Information on Diamonds:

Wednesday, December 10, 2008

Corrugating or serrating scissors and shears

Scissors blade with corrugations

Corrugations or serrations on a scissors are used to hold the material being cut in place. The teeth grip the slippery fabric, hair and keep fiberglass and kevlar from bunching up during cutting. Most cutting operations do not need these corrugations, but for certain applications they make the cutting job easier.

Kevlar, Spectra and fiberglass are difficult if not impossible to cut when it bunchs up. These teeth hold the material flat during cutting maintain a single layer that can be cut. These materials are very abrasive so the cutting edge breaks down quicker.

Sharpening your scissors with the Twice As Sharp® scissors sharpening system or other sharpener will remove these corrugations. You can usually sharpen the non-corrugated blade once or twice before the corrugated blade needs to be re-sharpened.

You have a couple of options when you need to sharpen the teeth off the corrugated blade. The most common is by using diamond corrugating files or a steel chequering file. The scissors blade needs be held tight at the correct angle in a vise like the Pana-Vise, and the file is used to create the teeth. Click here to learn more about the manual method of corrugating scissors.

Its fast and easy to corrugate with the new Wolff Corru-Gator

Another method to corrugate or serrate scissors is with the new Wolff Corru-Gator click here to learn about corrugating with the Corru-Gator.

Tuesday, December 9, 2008

Update on slide cutting:

Picture shows shears slide cutting fabric.

We have a customer that wanted to try a scissors with corrugations, small teeth on one blade. They called us to say that it was not working after getting this scissors.

We found out that they slide cut their fabric. Corrugations are put on a scissors to help keep the material from sliding out the blade while it is being cut. These teeth prevent the scissors from cutting the fabric during slide cutting.

Smooth slide cutting works best when both blades are honed.

More information on Slide Cutting