HOW TO CHOOSE A METAL CUTTING BAND SAW BLADE - RAKE, MATERIAL AND TEETH:
Bandsaw blades used for cutting metal have bent teeth. The bend in the teeth creates a cut slightly wider than the thickness of the blade, which is important to prevent the blade from getting stuck from being pinched by the metal. There are 3 different blade tooth patterns: raker, wave, and straight. For most metal cutting work, use the raker pattern. But if you are cutting thin work sections, such as tubing, angles, and channels, then consider using a blade with the wave tooth pattern. At least three teeth of the bandsaw blade must contact the workpiece at all times to prevent chatter and shearing off teeth due to tooth overload. Therefore, use fine tooth blades for cutting sheet metal and tubing. If the sheet metal is too thin for this to work with the finest tooth blade available, a useful trick is to put the metal between pieces of plywood, fiberboard, or soft thicker metal to support the blade. Our webpage How to use a BandSaw has a guide for selecting the proper pitch band saw blade for different metals and metal thickness.
The resulting finish mostly depends upon the saw pitch. The faster the blade speed and the finer the blade, the finer the finish will be. Cutting fluid also helps to improve the finish. A fine saw pitch blade, at high speed, with a light feed will produce the finest finish.
Bandsaw blades normally get dull from use, but some precautions will give you longer than normal wear on the blades. Blades will dull quickly if used at too rapid a speed for the metal being cut. Also, if the metal to be cut is too hard for the pitch of the blade, you will experience abnormal wear. The most common cause of premature blade wear comes from using too fine a pitch blade and from feeding the blade too heavy.
indicate a dull bandsaw blade that should be replaced:
To help choose a band saw blade, here is a chart showing the recommended number of teeth for various materials and thicknesses:
the following rule applies to choosing the speed of your bandsaw blade:
Remember to put proper tension on your blade before using the bandsaw and release the tension when you are done.
Click to return to our Machine Tool Blog
Click for the American Machine Tool Homepage
American Machine Tools Corp.
5864 Northwest Hwy
Chicago IL 60631 USA
Click to email us
Website by eMarketAmerica
Copyright © 2013
American Machine Tools Corp.
All rights reserved
Information on this website is subject to change without notice.
Offers from American Machine Tools Corporation include include Terms and Conditions shown on our website.
Liability is strictly limited to those warranties of fitness for purpose and safety as provided by the manufacturer.
Products and Logos in this website are trademarks or registered trademarks of their respective companies or mark holders.