Looking to measure the cutting circle of your jointer or planer cutterhead? Most jointers or planers come with either 2, 3, or 4 blades. To measure the cutting circle of a 2-blade or 4-blade cutterhead, simply measure the distance between two opposite edges, as shown in the top picture. However, for 1-blade or 3-blade cutterheads, the cutting circle cannot be measured directly. Instead, you can calculate the circle by measuring the two sizes indicated in figures (2) and (3). For this task, a regular caliper, even one that's not an industrial standard, will suffice. If you have any questions, feel free to email us at sales@sheartak.com or call (519) 880-8181.
