Author: BigDaddy | Category: Blog, Carpentry Tools Sharpening Service, Circular Saw Blade Sharpening Services | Tags: circular saw blade anatomy and grind types, freud circular saw blade, saw blade anatomy
Circular Saw Blade Sharpening Services Near Mobile Alabama
One of the sharpening services finished in the shop today was a freud 11562618 – 50/11, a 12″ inch, 100 tooth rip-cut blade. Freud makes superb blades and when I receive these in the shop I recognize the investment the owner has in the blade and enjoy bringing the blade back to like-new or better-than-new condition.
Circular Saw Blade Anatomy
This blade has a 10 degree hook angle bevel with an ATB grind and from-the-factory side grind polish. Sharpening this type of blade takes quite a bit more time than most of the common home-owner or building contractor type of blades. More time is required because the diamond wheels I use for sharpening must be alternated for every other tooth. And, the side of each tooth should be polished – usually with 4,000 grit diamond stones.
This diagram may help clarify some of the terms I use. Tooth design is the determining factor in deciding which blade is best for any application. Here’s a quick overview of how subtle changes in bevel, gullet and kerf affect cutting performance.
Bevel – Teeth can have a single bevel, two bevels or no bevel at all. Types of bevels can alternate from tooth to tooth on a given blade. The bevel is what gives a blade its specific cutting pattern.
Gullet – This is the space between teeth that clears the work piece of chips after the cut. The deeper the gullet, the more efficiently chips are cleared.
Kerf – This is the face of the tooth, where the actual cutting takes place. The pattern of alternating kerfs, known as the grind, decides what applications a blade is best for.
Circular Saw Blade Grind Types
Circular Saw Blade Anatomy – Tooth Grinds
Flat Top Grind (FTG) – best for ripping
Alternate Top Bevel (ATB) – for cross-cutting, cut-off and trimming
Triple Chip Grind (TCG) – perfect for hard, abrasive materials like non-ferrous metals, hardwoods and plastics
Multi-Purpose Carbide Tipped (MCT) – for ripping and crosscutting, miter
Tri-Grind (TRI) – combination grind
Left Trim Grind (3/1) – good finish, one side only
Right Trim Grind (3/1) – good finish, one side only
Solid Surface Grind (SSG) – for extremely dense man-made materials
High 30 degree ATB (MH) – chip-free cuts on melamine and plywood
Published: January 2, 2019