Mechanical Combination Lock
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
2
www.m-locks.com
1. Lock assembly
The lock can be installed in all 4-installation directions. The combination lock has a standard
footprint of 66.5 x 41mm. Only use supplied screws to mount the lock. Tighten the screws securely
so the lock body is attached firmly to the mounting surface. Fix hand tied (Maximum Torque 5, 5
Nm).
The bolt work must block the bolt sufficiently on both sides in slide-out position. (8mm) But if one
side is blocked a support must be fixed on the opposite side. The margin between closing point
and respectively support and bolt is 0.5-1mm. The support is not necessarily if the side pressure is
limited to 1.8kN. The bolt counter-pressure maximum 1kN.
2. Assembly of the dial:
Spindle has US-screw-thread 5/16-40 UNS-2A (spindle groove on "44"). Assemble the
ring so that the opening symbol is perpendicular above. Cut spindle to length so that the
spindle-end levels with the cam. Don’t let spindle stick out. Twist dial hand tight in the
cam and reverse approximately rotation until the correct spline key position. Spelling
ca.0,5mm axial.
The spindle transit through the armouring can have a maximum diameter of 10-12mm.
3. Spline key position
Depending upon installation of the lock there are 4 spline key positions possible, which are
indicated on the cam:
RH, LH, VU, VD.
Seen from the assembly side:
RH
LH
VD
VU
The correct spline key position is very important, because otherwise the "prohibited area" (last
figure not between 0-20) moves in the operational range and can lead to lock malfunctions.
4. Place the spline key
If the spindle groove is on the correct spline key position drive the attached spline key
carefully in, so that the nose lies gently on the spindle.
5.
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.
