Mechanical combination lock Atlo ATLO-KRM-511 — code-operated door lock, keyless security device

Atlo ATLO-KRM-511 is a mechanical combination lock engineered for code-operated access control without reliance on electricity. The lock offers keyless locking and unlocking using a numeric code, delivering a mechanically driven solution for doors and gates where simple, reliable, and tamper-resistant access is needed. Its design suits both internal and external installations where electronic systems are impractical or undesired.

Advantages

The mechanical construction eliminates the need for batteries or external power, reducing maintenance and failure points. Operation via a numeric code removes dependence on keys and simplifies access management for multiple users. The lock’s compact mechanism is intended for straightforward installation on standard door types and provides consistent mechanical performance in a range of environmental conditions.

Suitable for

• Residential entrance and interior doors
• Commercial premises and service rooms
• Gates and outdoor doors where electrical access is not available
• Storage rooms, cabinets and utility enclosures

Key specifications

• Mechanical combination operation using a numeric code
• Keyless access control suitable for multiple users
• Designed for mounting on standard doors and similar closures
• Operates without electrical power or batteries
• Suitable for internal and external installations

How to use

Set and operate the lock by entering the chosen numeric code on the mechanical keypad and turning the handle or knob to lock or unlock the door as required. Change the code following the manufacturer’s procedure to restrict or grant access to different users. Because the mechanism is purely mechanical, ensure proper mechanical alignment during installation and verify smooth code entry and turning action before regular use.

Usage recommendations

Install the lock on doors of appropriate thickness and construction following the fitting instructions. Regularly check mechanical components for wear, keep the mechanism clean from debris, and avoid forceful operation. Use a code of sufficient length and change it periodically to maintain access control integrity.