Technical Foundation
What Is a File Cabinet & Cam Lock?
A cam lock is a compact cylinder lock that mounts through a single drilled hole and rotates a flat metal cam when turned by its key, engaging a slot or catch to secure a door, drawer, or panel. They're the standard locking mechanism on filing cabinets, mailboxes, vending equipment, and electrical enclosure doors because they install fast, need minimal panel thickness, and the cam shape and length can be swapped independently of the cylinder.
Selection depends on cylinder diameter (commonly 5/8", 3/4", or 1", matched to the panel's drilled hole), cam length and shape (matched to the throw distance and slot on the receiving panel), and keying — keyed different (each lock unique), keyed alike (all locks share one key), or master keyed (individual keys plus a master override). Disc tumbler mechanisms are the most common and cost-effective; pin tumbler cam locks offer more pick resistance for higher-security applications.
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| Spec | What It Means | Why It Matters |
|---|---|---|
| Cylinder Diameter | Commonly 5/8", 3/4", 1" (15mm-25mm) | Must match the panel's drilled mounting hole exactly — not adjustable after purchase |
| Cam Length/Shape | Straight, offset, or flat cams in varying lengths | Determines throw distance to reach and engage the catch on the cabinet frame |
| Keying Option | Keyed different, keyed alike, master keyed | Master keying lets facilities staff access many cabinets with one override key |
| Tumbler Type | Disc tumbler (standard) vs. pin tumbler (higher security) | Pin tumbler cylinders resist picking better but cost more per lock |
| Mounting Style | Nut-and-washer threaded barrel, various panel thicknesses | Barrel length must clear the panel thickness for the retaining nut to seat properly |
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Applications
Where File Cabinet & Cam Locks Get Used
Cam locks are specified anywhere a thin panel or drawer front needs a compact, quick-install locking point.
Office & Facilities Management
Securing filing cabinets and storage drawers with master-keyed cam locks so facilities staff retain override access.
Electrical & Control Panel Enclosures
Locking hinged enclosure doors on control panels and switchgear cabinets to restrict unauthorized access.
Mailroom & Multi-Tenant Buildings
Keying individual mailbox cam locks differently while providing a master key for postal or facilities access.
Vending & Amusement Equipment
Securing coin boxes and service panels on vending machines and arcade cabinets against tampering.
Furniture Manufacturing
Specifying OEM cam locks for desk drawers, credenzas, and lockable storage furniture during production.
Warehouse & Tool Crib Storage
Locking tool cabinets and parts bins with keyed-alike locks to simplify key management across many units.
FAQ
File Cabinet & Cam Locks Questions, Answered
How do I know what cylinder diameter I need?
Measure the existing drilled hole in the panel, or if replacing an old lock, measure the cylinder's outside diameter directly. Standard sizes are 5/8", 3/4", and 1" (or metric equivalents), and the cylinder must match the hole exactly since cam locks aren't adjustable — a 3/4" lock won't seat in a 5/8" hole.
What's the difference between keyed different, keyed alike, and master keyed?
Keyed different means every lock has a unique key that only opens that one lock — used where each cabinet needs independent security. Keyed alike means all locks in an order share a single common key. Master keyed provides each lock its own unique key plus a separate master key that opens all of them, common in office and facilities settings where staff need individual access but management needs override capability.
Can I replace just the cam without replacing the whole lock?
Yes, on most cam locks the cam is a separate flat piece secured by a small screw at the back of the cylinder, so it can be swapped for a different length or shape without replacing the cylinder — useful when a cabinet's throw distance changes or the original cam has worn or bent.
What's the difference between disc tumbler and pin tumbler cam locks?
Disc tumbler mechanisms use flat wafers and are the standard, cost-effective choice for filing cabinets, mailboxes, and general storage — adequate security for typical office and light-industrial use. Pin tumbler mechanisms use spring-loaded pin stacks similar to a door lock and offer meaningfully better pick resistance, worth the extra cost for higher-security cabinets or enclosures.
How do I measure cam length and throw for a replacement lock?
Measure from the back face of the mounting panel to the center of the existing cam's engagement point, and note whether the cam is straight or offset. If replacing a worn lock on an existing cabinet, matching the old cam's length and rotation direction is usually easier than measuring the slot in the frame directly.
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