Maximum Adjacent Cut Specification (or MACS) of a lock is the maximum variance of component sizes between two adjacent component. Mr. Locksmith is a locally owned and operated establishment. We provide professional locksmithing & security services. Mr. Locksmith offers round the clock locksmith services to Residents. We are a family owned and operated business that has been running over 25+ years.
Maximum Adjacent Cut Specification
MACS: (abbr.) Maximum adjacent cut specification: The Maximum Adjacent Cut Specification (or MACS) of a lock is the maximum variance of component sizes between two adjacent components. This term is primarily used in pin-tumbler and wafer locks to define restrictions on the number of real key differs to ensure the proper operation of the lock. refers to the maximum variance allowed between two adjacent cuts on a key. When an adjacent pair of cuts on a key violates the MACS rule, it causes some or all of the shallower cut to be removed by the key cutting machine.
QUESTION: What are the MACS values for Schlage and Falcon keys?
- For Schlage Conventional and Full Size keyways (see keyway families listed below), the MACS is 7. Violators of this rule would be bittings with the following adjacent pairs: 0 and 8, 0 and 9, 1 and 9.
- For Schlage Small Format (and SL) keyway families, there is no MACS. All adjacent pairs are acceptable.
- For most Falcon Conventional keyways, the MACS is 5. Violators of this rule would be bittings with the following adjacent pairs: 0 and 6, 0 and 7, 0 and 8, 0 and 9, 1 and 7, 1 and 8, 1 and 9, 2 and 8, 2 and 9, and 3 and 9.
- For Falcon Small Format keyways, there is no MACS. All adjacent pairs are acceptable.
QUESTION: What is the formula for calculating MACS?
ANSWER: The formula for calculating MACS is | MACS = ([pin spacing]-[cut root])/([depth increment](tan([cut angle]/2)
Terry Whin-Yates is a 3rd Generation Locksmith, 25+ years Locksmith Experience, BA (Hons) Criminology. Terry Whin-Yates participates in locksmith podcasts, writes blogs, posts locksmith videos on YouTube and TikTok. Also, teaches Basic to Advanced Locksmith Online and Hands-On Locksmith Courses Mr. Locksmith Training.
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