What a Setup Block?
A setup block, sometimes called a tri-block, is used in machining fields, typically to aid in setup of milling applications. It is a block of steel that is precisely squared and parallel. Typically, setup blocks are machined with a series of tapped holes, sometimes threaded, which serve to hold fixtures in place. As setup blocks are generally used to aid in the machining process, it’s important to have them calibrated on a regular basis, to ensure quality of the finished product they re being used to support.
Types of Setup Blocks
Step blocks are make in a variety of configurations. At Cross precision measurement, one of the most common types of step blocks we see have sides of 1, 2, and 3 inches long, which is why a lot of times in the field they are referred to as “123 blocks”. While the 1, 2, and 3, inch dimension is most common, other variations are built based on the need. These include blocks that are 1-2-3 & 2-4-6 inches, but are sometimes custom built, based on the need.