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Circular Saw Blade Fitment Guide – Choosing the Right Blade for Your Saw

General

Choosing the right blade can be overwhelming given the combination of factors available for a given size of blade. The right selection is important from an efficiency and safety point of view. When choosing a blade always go for a replacement the same size as your current blade. Typically blades will be marked with text such as: 210/30/32T. This would mean a 210mm diameter blade with 32 Teeth and a centre bore of 30mm.

Terms

Kerf
The Kerf is the thickness of the Blade Teeth and therefore the width of the cut.

Bore
The Bore or Centre Hole of the Blade.

Plate
The Plate is the main part of the blade. Thin plates are often used with cordless saws.

Rake
The angle or hook of the cutting teeth relative to a line from the centre of the blade. If the top of the tip leans toward the edge, that’s a positive hook or rake.

Hand Held Saws and Table Saws will normally use a positive rake blade.

Mitre Saw or Radial Arm Saws will normally use a zero degree or negative rake blade to avoid kickback when cutting timber by means of lowering the blade onto the workpiece.

Reducing Ring
Also known as a Bush, rings are available to reduce the bore of a blade to a smaller bore. Many of our blades are supplied with a range of reduction rings.

Teeth
The number of teeth on a blade will influence how smooth the final cut is. Generally the more teeth per inch the smoother the cut. For thicker material use a blade with less teeth to avoid burning. Soft materials will chip with too few teeth ans burn with two many so use one in-between.

Tooth Geometry
The shape of the teeth which dictates the primary purpose of the blade. There are different types of teeth for specific jobs. For example specialist cutting of materials such as laminated wood or aluminium. Blades can have different types of tooth geometry, Alternate top bevel (ATB) for general cutting applications and triple chip geometry which is used for blades cutting laminated wood or aluminium. Here is a short guide:

ATB – Alternate Top Bevel – Typically used for cross grain and some ripping blades. (Ripping is cutting with the grain).

FTG – Flat Top Grind – For cutting with the grain

TCG – Triple Chip Grind – Typically used for harder materials and aluminium

Nail cutting blades are available and suitable for cutting wood containing the occasional nail.

Expansion Slots
Improves performance by reducing heat build up.

We have blades to suit all budgets and from many manufacturers. If you don't see just what you want please get in touch.