![]() Below is a video that will walk you through the process if you’re interested in making some yourself.īeware: it is common to purchase a 1-2-3 block and the holes end up being a bit too small for your needs. They must be precisely squared and parallel. Machining your own 1-2-3 blocks requires a high level of precision and accuracy because of their versatility in a machine shop. These holes can be threaded, though 1-2-3 blocks typically have a combination of threaded holes and non-threaded holes.ĭepending on where your 1-2-3 blocks will be used in the shop, it’s important to have an air tool to clean out the holes so that coolant, dust, and chips don’t build up in the hole or interfere with your work. The holes also make the block much lighter, making it easier to handle. For starters, they enable you to connect the blocks to one another and/or to the worktable with bolts, allowing you to create different configurations, making application possibilities endless. These holes are there for a couple different reasons. 1-2-3 blocks are handy for accurately representing lengths, making them similar to gage blocks.Īdditional uses for 1-2-3 blocks include:Īlthough not always the case, 1-2-3 blocks typically feature cross-drilled holes. In milling operations, these blocks are commonly used as a square reference or a mounting point. Precision 1-2-3 blocks are also useful for anchoring pieces to your worktable so that they are in an elevated position. They can be placed under the part so that through holes can be drilled through the part without damaging the table. For example, they can be held against an edge to create a protruding face in which to use the given measuring tool. Using precision blocks or 1-2-3 blocks requires creativity because they can be used in many ways-some that are up to you to think up! Common Ways to Use 1-2-3 Blocksġ-2-3 blocks come in handy for inspection and measurement tasks. There isn’t one right way to use 1-2-3 blocks, in fact, the amount of uses is exponential and can look different from one shop to the next ( this one really caught our attention). There are also larger versions of 1-2-3 blocks that are called 2-4-6 blocks. ![]() ![]() They are called 1-2-3 blocks because their sides are 1,2 and 3 inches long, respectively. 1-2-3 blocks are blocks of hardened and ground steel. What is a 1-2-3 block? You probably remember these gems as one of your first machining projects back when you were in school or during your apprenticeship. ![]()
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