Answer
Jun 18, 2026 - 12:34 PM
Blade diameter determines the depth and width of the biscuit slots you can cut, making it a key factor in choosing a biscuit joiner accessory. The most common diameter is 4" (about 100 mm), which is versatile enough to cut standard biscuit sizes (#0, #10, #20). Some joiners may accept slightly larger or smaller blades for specific applications. For instance, the 4" Carbide Tipped Blade for Plate Joiner Makita A-95118 and the 4" Replacement Joiner Blade Porter Cable 5558 both offer a 4" diameter for reliable slot cutting, while the Amana Tool LAM400T6 is 100 mm, also fitting most joiners. Having a choice of blade diameters lets you match your accessory to your biscuit size and project needs.
