If you'd like to double check that you're replicating the factory grind, I suggest coloring the cutting edge of the tool with a sharpie pen. With the machine turned off, lay the scraper on the grinding platform and rotate the wheel by hand.

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There are many schools of thought regarding negative rake scrapers, included angles, and techniques. We've provided two of our favorite introductory videos offering varying perspectives.

The general idea is that a larger included angle creates a less aggressive tool. On the other hand, a lesser included angle provides a finer finish. Cindy Drozda suggests 75º or less, and Stuart Batty uses a 50º included angle.

Since their inception ages ago, negative rake scrapers have undergone a resurgence in popularity. And for good reason. They're smooth-cutting and less aggressive than the mainstream scrapers many turners are familiar with. Keep reading for an assortment of our favorite negative rake resources, tips, and sharpening techniques.

Hipat geared slotting machines in Howrah Kolkata are of very rigid construction with a good metal removing capacity combined with sustained accuracy. These are eqrally suitable for tool room or high speed batch production. The above mahcines suitable for various jobs, specially motor parts, scooter parts and intrnal teeth cutting etc.

There are many schools of thought regarding negative rake scrapers, included angles, and techniques. We've provided two of our favorite introductory videos offering varying perspectives.

Our personal preference is an included angle of 65º (all our negative rake scrapers are ground to this degree). To create this angle, the top angle is ground to 25º, and the bottom to 40º.

Negative rake scrapers are ground with a top and bottom angle - and the sum of these is called the included angle. As with any tool grind, different turners prefer different negative rake included angles. However, most agree that an included angle greater than 80º will not perform well, and anything greater than 90º won’t cut at all.

If the wheel is removing the mark, you'll know you have the correct angle. If not, adjust the platform until the mark is removed. You can also check the angle with a protractor.

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