What does the second "02" in the tool word T0202 represent?

The second "02" in the tool word T0202 specifically indicates both the geometry and wear offset for tool number 2. In CNC programming, the tool word is structured such that the first part (in this case, the "T02") identifies the tool number being used, while the subsequent numbers (the second "02") refer to the specific offsets applicable to that tool.

The geometry offset accounts for the physical dimensions of the tool, ensuring that the CNC machine accurately positions the tool according to its shape and size. The wear offset allows the machinist to adjust for any wear that occurs over time due to usage, helping to maintain precision in machining operations.

This understanding is key for effective tool management in CNC machining, as proper use of tool offsets is integral to achieving the desired tolerances and ensuring that the machine operates smoothly.