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Max Adjacent Cut Specification MACS

Max Adjacent Cut Specification MACS

MACS isn’t just multiple boxes of macaroni or mistyped MACK…its Max Adjacent Cut Specification!

Are you generating a new key from scratch or making a master key system? Max Adjacent Cut Specification is a crucial part of this process, and understanding it can be the difference between a working key or system, and a waste of time!

MACS (Max Adjacent Cut Specification) is the maximum allowed distance between cuts. If the difference between the cuts is greater than the number specified by the manufacturer of the particular lock, the key will not work properly. So if the MACS is 5, you can’t put a 1 depth and a 7 depth next to each other, because the distance/number between the two is 6, which is greater than 5. If this happens, you usually won’t be able to push the key into the lock. Even if you can, you won’t be able to pull it out.
Take a look at the following chart to help you understand the MACS of popular lock manufacturers. Download it so that you have it for future reference!
MACS Chart

Any situation in which you find your key bitting over the MACS is not fun or easy to fix, so make sure you stay within the guidelines.

Looking for more locksmith and rekeying tech tips?

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CLK Supplies owner, PJ Slauson, has authored and published a book, Lock Rekeying Made Simple.This article was a small part of valuable knowledge found in Lock Rekeying Made Simple. The book will walk you step by step through the process of Rekeying locks. Covering basic lock disassembly, how a lock cylinder works, tools needed for the job and the 5 steps to rekey a lock. Once you’re done reading this book you can be Rekeying locks like a pro! PJ shares some trade secrets that will help you overcome some of the heralds of lock rekeying. Enjoy 54 Pages of jam-packed information! No matter what you’re experience level is, PJ will guide you step by step through the process.

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