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Mechanical Combination Lock
Technical Manual
Mounting Instructions
ML6740
The VdS recognition of this lock is based on this
mounting instruction. Read carefully.
The force applied to the lock bolt should not exceed 1 KN. If higher force is applied, please consult
with the testing institute (i.e. UL, VdS). Only use supplied screws to mount the lock. Fix the lock
handtied.
The lock has to be fitted exclusively on steel secure storage. The mounting base also must be made of
steel . Installation on other materials only after consultation M - LOCKS or VdS .
It is recommended to prevent access to unauthorized persons to safety-relevant parts of the high-
security lock when the safe is open . Par example by a with a screws fixed interior cover.
The lock housing must be protected against destructive attacks from outside with suitable protective
materials .
CHARACTERISTICS
The ML 6740 is a manipulation proof 3-wheel combination lock with new features making it very easy
to mount. VdS Kl.2, EN1300 Class B, ECB-S, CNPP, IMP, DNV.
The lock has the standard foot print (66,7x41mm) and can be mounted in all four mounting-directions.
(HR, HL, VU, VD)
Measurements: 85mm x 61mm, x 29mm. Lock bolt: 25mm x 8mm with two M4 holes in the bolt head.
Bolt Travel: 8mm.
The lock has been tested with 10,000 opening cycles with a bolt load of 2.5 N (mounting position Bolt
right). All other mounting positions as well as higher loads (for example due to bolt work or blocking
element) must be tested by the safe manufacturer with at least 10,000 opening cycles and a
corresponding load.
The lock needs no spline key. It works with a square 6x6mm shaft as the spindle.
Two optional locking bars can be inserted to make a 3-way locking system.
Mechanical Dials
This mechanical lock compatible with the following M-LOCKS dials:
CS-serie
MD-serie
ST-serie
KL1060
KL1560
For more information, please read the technical description and mounting instruction of the dial and
ring assembly.
Due to the square shaft the lock is not compatible with dials that have a round, threaded spindle.
M-LOCKS BV
Tel: +31 (0)314 376 876
Vlijtstraat 40
ver. 1.2 2017 12 11
Fax: +31 (0)314 376 878
NL-7005 BN Doetinchem
1
www.m-locks.com
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Summary of Contents for M-LOCKS ML6740
- Page 1 The lock needs no spline key. It works with a square 6x6mm shaft as the spindle. Two optional locking bars can be inserted to make a 3-way locking system. Mechanical Dials This mechanical lock compatible with the following M-LOCKS dials: CS-serie MD-serie...
- Page 2 (Torque approximately 3,5 Nm). With the lock in OPEN-position (bolt retracted) hold the dial in a way that approximately “93” is under the opening index and push it with some pressure into the lock. The shaft cannot be pulled out. M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver.
- Page 3 Changing Index on the dial. Take out the key and dial the valid code again. Now dial your factory code using the CHANGING INDEX. * We suggest you set the code to 10-20-30 as that matches the end-user instruction M-LOCKS provides.
- Page 4 Loosen the screw that holds the shaft in the dial and pull out the dial slightly. Then tighten the screw hand tight. Do not over tighten as that will pull the dial back in. Use liquid thread-lock like Loctite™ if required. M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver.
- Page 5 10,000 opening cycles and a corresponding load. Two optional locking bars (ML6790) can be inserted to make a 3-way locking system. DIMENSIONS / MOUNTING INSTRUCTIONS M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver. 1.2 2017 12 11...
- Page 6 Turn dial LEFT to extend the bolt. The bolt must slide easily to the end position and should not be restricted by the bolt work. M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver.
- Page 7 After the new code is completely entered, turn change key LEFT and remove it. The new code is installed. Try the new code several times (using Opening Index) before closing the door! M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver.
- Page 8 Turn cam counterclockwise until lock opens. The cam should be lined up with the “LOCK OPEN” line on the cover (see figure 2). figure 1 figure 2 M-LOCKS BV Tel: +31 (0)314 376 876 Vlijtstraat 40 ver. 1.2 2017 12 11...