How to choose a nail drill

An e-file takes more time out of a working day than any other piece of kit, and hurts your hand more than any other if you buy the wrong one. Four things decide it, and the headline RPM is not one of them. If you only want the shortlist, our best electric nail file ranking compares five e-files sold in the UK.

Check the bit shank before anything else

The nail industry standard shank is 3/32 of an inch, which is 2.35 mm. Practically every professional bit sold in the UK is made to it.

Before you buy, check that the machine takes this standard shank. If the product page does not state it, ask the brand. A machine you cannot fit bits to is an expensive paperweight, and this is a two-minute check.

Torque, not top speed

You will spend your entire working life somewhere between 5,000 and 20,000 RPM. Cuticle work sits at the bottom of that; bulk removal at the top. A machine quoted at 45,000 RPM is telling you its ceiling, not its working range.

What actually separates a good machine from a cheap one is whether it holds its speed when you lean the bit into product. That is torque, published in Ncm by the brands that bother, and around 4.8 Ncm is a good professional figure. A machine that bogs down under pressure makes you press harder, and pressing harder is what burns clients.

Vibration and weight in the hand

A handpiece that buzzes makes precision work near the cuticle impossible and leaves your hand aching by mid-afternoon. Brushless motors are smoother and quieter than brushed ones and last longer, which is why every serious machine sold in the UK now uses one.

Weight matters too, but balance matters more: a light handpiece that is heavy at the back is worse than a slightly heavier one that sits properly in the hand.

Corded or cordless, and the battery question

Cordless machines are the default now, and the professional ones sold in the UK publish eight to twelve hours of battery life, which comfortably covers a day.

The catch is that the battery is the part that dies first, usually somewhere in year two or three, and on most machines it is not user-replaceable. The only real protection is warranty length. One year is common. Three years, where a brand offers it, is worth paying for.

The bits are half the job

The best machine in the world with a clogged bit will heat a client’s nail up. Start with three:

• a carbide barrel or tornado bit for bulk removal;
• a fine diamond or ceramic bit for the cuticle area and natural nail prep;
• a mandrel with sanding bands for general shaping.

Brush them out with a brass brush after every client and retire them when they stop cutting the way they did new. A blunt bit does not stop working, it starts rubbing, and rubbing is heat. We cover this in more detail in our nail drill bits comparison.

And get the extraction sorted

An e-file makes fine dust, and fine dust stays in the air. If you are buying your first machine, budget for a desktop extractor at the same time. Our dust extractor comparison starts at under £100.

When you are ready, our best nail drill comparison has five e-files sold in the UK, with the published specs side by side.