Torque & RPM

Many nail techs only look at RPM when buying an e-file but, RPM only tells you how fast an e-file can spin, not how well it maintains power while filing or its ability to keep spinning. Which is where torque comes in.

What is RPM?

RPM = Revolutions per minute or rotations per minute.

This means how fast your drill bit spins.

A higher RPM = faster spinning, not more power.

What is Torque?

Torque = rotational force.

This means how much resistance your e-file can handle without stalling (how efficiently your e-file performs).

A higher torque = smoother removal and less pressure (less heat and vibration).

Torque is measured in Ncm (Newton-centimetres).

Why torque matters more:

High RPM + Low Torque = More strain on your hands, more pressure on the nail, more heat, vibration and risk of damage.

High Torque = Less strain on your hands, less pressure on the nail, smooth product removal, controlled filing, less heat and vibration and safer work.

Common Mistakes:

Cranking RPM too high thinking speed = power.

Ignoring torque completely can lead to stalling, extra pressure and strain on your hands.

Pushing harder instead of letting the e-file do the work.

Buying an e-file based only on high RPM marketing - a 35,000 RPM e-file with low torque won't perform well.