| Type | Very small active cam |
| Protects | Thin, finger-width cracks |
| Caution | Lower strength, precise placement |
| Difficulty | Advanced |
A micro cam is a very small spring-loaded camming device built to protect thin cracks too narrow for standard cams. Their tiny lobes hold in finger-width and smaller cracks, but they have a narrower holding range and lower strength than larger cams, so placement precision and good rock are critical.
How it works
Like any cam — expanding lobes grip the crack — but miniaturised active protection for thin seams.
The limits
Lower strength and a narrow range mean careful placement matters; below their size, climbers turn to offset and brass nuts.
Frequently asked questions
What is a micro cam?
A micro cam is a miniature spring-loaded camming device with very small lobes, made to protect thin cracks that standard cams are too big for. They work the same way as larger cams — lobes expand to grip — but at a much smaller scale.
How small do cams go?
The smallest micro cams protect cracks only a few millimetres wide — roughly thin-finger to fingertip size. Below that, climbers rely on small offset nuts, brass micro-nuts, and pitons, as cams become too small to hold reliably.
Are micro cams safe?
They can be reliable in solid rock with a careful placement, but they have a narrower holding range and lower breaking strength than full-size cams, and are less forgiving of poor rock or imperfect placement. Experienced climbers treat them with appropriate caution.
Sources
- Trad protection — American Alpine Club