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Tools and Training for Security Professionals



Mechanical Safe Locks

Formerly, Combination Lock Technology


Course Description:
This class was designed to give the participant a solid background in servicing and troubleshooting mechanical combination safe locks. It is ideal for both beginning and intermediate level locksmiths and safe technicians. In the extensive troubleshooting section, the student will learn how to deal with a wide variety of both common and unusual lock problems.

Class Time: 9am to 5pm
Course Length: 2 Days
Course Fees: $550.00
Registration Fee: $25.00 (First time students only)

aloa-icon.png This class has been approved for 2 points towards the ALOA PRP Recertification requirements.
  If you have NOT yet achieved a PRP Certification, or are trying to achieve a higher level, this class can also serve as valuable preparation for Elective L-24 (Locks, Safe Combination Type)
Download an Enrollment Application by clicking here.

The following is covered in detail:

  • UL Standards for Safe Locks
  • Lock Handing
  • Dialing procedures
  • Determining the number of wheels in a lock
  • Determining the dialing sequence
  • The forbidden zone
  • Combination changing procedures for key-changeable locks
  • Combination changing procedures for hand-changeable locks
  • Mechanical and thermal relock triggers
  • Contact points - what they are, how to locate them, & what they tell us
  • Lubrication points
  • Opening locks with loose dial rings
  • Opening locks that are splined incorrectly
  • Detecting and compensating for stuck wheel flys
  • Opening locks that have had the dial knocked off
  • Understanding LOBC indexes
  • Opening locks with loose spline keys

Do you need this class? Test yourself with these questions!

  1. From the outside of a locked safe, how would you determine that the relock trigger is engaged?
  2. Is wheel number one closest to or farthest from the drive cam?
  3. What is most likely wrong with a lock that will open but cannot be re-locked?
  4. Does a "zero change" lock have a separate changing index?
  5. If all you knew about a lock was that the dial was numbered from 1-100, could you make an educated guess as to which company made that lock?

Each Student will receive:

  • 2-in-1 screwdriver
  • MBA USA Work Mat
  • "Modern Safe Locks"; a reference book by Mark Bates
  • Printed copy of the Class Presentation
  • MBA USA Course Certificate
  • MBA USA Coffee Mug
  • MBA USA Ruler
  • MBA USA pen
  • Notepad

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