Merlin Router Book

16 Tel: 01509 610300 • Fax: 01509 610400 • Email: sales@merlintools.co.uk • www.merlintools.co.uk m anufactured Optimising speed and feeds Commence using the recommended chip load and RPM for your material. Increase the feed rate until the quality of the material finish starts to decline, then decrease the feed by 10 to 15%. Then decrease the RPM until the material finish starts to decline again, then start to increase your RPM until you achieve a desired finish to your material. You have now achieved optimal speed and feed by taking the largest chip possible. Router Technical Information Flute Geometry Straight flute. Straight flute offers a neutral cutting action. Upcut spiral flute. The upcut spiral is a right hand spiral with a right hand cut. They are used when a good bottom finish is required on the material. Chip flow is in an upward direction. Downcut spiral flute. The downcut spiral is a left hand spiral with a right hand cut. They are used when a good top finish is required on the material. Chip flow is in a downward direction. Compression spiral. The compression spiral is designed with both upcut and downcut flutes. The upcut and downcut flutes compress the material which eliminates chipping. Compression spirals are best for double sided laminates. Chip flow is in a sideways direction. Upcut Good Bottom Finish Right hand spiral. Right hand cut. Downcut Good Top Finish Left hand spiral. Right hand cut. Material Material Material Flow Flow Flow Compression Good Top and Bottom Finish