Tooling tips for African wawa
More important than knife angles to obtaining a smooth machined finish is feed speed. 1998.
by Professor Gene Wengert
One of my customers is using the species called Wawa from Africa. He is having a problem with the finishing. The surface is very rough and has lots of chipping. The timber is KD to 10/12% MC.
What is the recommended cutting and clearance angle for this species? What is the best feeding speed you would recommend to achieve a very smooth surface?
Perhaps more important than knife angles is the feed speed. We look for more than 12 knife marks per inch if we want a good surface and over 20 if we want the best. Otherwise, the rake angle is best about 25 degrees, similar to American oak.
Are you certain about 10% MC? It sounds much drier.
Professor Gene Wengert is Extension Specialist in Wood Processing at the Department of Forestry, University of Wisconsin-Madison.
Click on Wood Doctor Archives to peruse past answers.
If you would like to obtain a copy of "The Wood Doctor's Rx", visit the Wood Education and Resource Center Web site for more information.
Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Solid Wood Machining: General
KnowledgeBase: Solid Wood Machining: Tooling
KnowledgeBase: Wood Engineering: Wood Properties
KnowledgeBase: Knowledge Base
All rights reserved. No part of this publication may be reproduced in
any manner without permission of the Editor.
Review WOODWEB's Copyright Policy.
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.
335 Bedell Road
Montrose, PA 18801
Copyright © 1996-2021 - WOODWEB ® Inc.