Arcade machine coin doors are secured using several common lock types designed to protect revenue and prevent unauthorized access. The most prevalent security mechanisms include:

1. Tubular Locks (Ace Locks)

These circular key-operated locks are the industry standard for arcade coin doors. Their pin tumbler mechanism provides moderate security while being cost-effective for manufacturers. The distinctive barrel shape makes them easily identifiable.

2. Cam Locks

Frequently used on both coin doors and internal compartments, cam locks feature a metal tab that rotates to secure the door. They offer flexible mounting options and are available in various lengths to accommodate different door thicknesses.

3. Padlock Hasps

Some arcade cabinets feature hasps designed for standard padlocks. This allows operators to use their preferred padlock type, though it's less common in commercial settings due to lower security compared to built-in locking systems.

4. Electronic Locks

Modern arcade machines sometimes incorporate electronic locking systems that use keypads or magnetic cards. These provide advanced security features and audit trails but remain less common than mechanical alternatives.

The choice between these locks depends on security requirements, budget considerations, and maintenance preferences. Tubular locks remain the most widespread due to their balance of security and affordability, though many operators upgrade to high-security variants to deter picking attempts. Regular maintenance including lubrication and periodic lock replacement ensures reliable operation and protects against revenue loss. Understanding these lock types helps arcade owners and technicians maintain proper security for their equipment.