Guide · E-files
Forward and reverse on a nail drill
What the forward/reverse switch does, which drills list it, and the two-way and left-hand bits that let left-handed techs cut in reverse.
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Short answer
Forward/reverse changes which way the bit spins. Left-handed techs use reverse so the bit cuts the right way from their side, and right-handed techs use it to work the other side of the nail. Many e-files have the switch, including KUPA's Passport NEXT and Medicool's Pro Power 35K Portable.[1][2] The bit matters too: a standard carbide bit cuts in one direction, while a two-way bit or a left-hand bit is made to cut in reverse.
Why direction matters
A carbide bit has angled cutting edges, its flutes. Spun the way they were cut, they slice. Spun backward, they rub and skip instead of cutting cleanly.
Reverse simply spins the bit the other way. Which direction you need depends on your hand, the bit, and which side of the nail you are working.
Which drills have it
Check the controls before you buy. Some examples from maker pages:
| Drill | Forward/reverse, per the maker |
|---|---|
| KUPA Passport NEXT kit | Yes, with variable speed and a pause button[1] |
| Medicool Pro Power 35K Portable | Yes[2] |
| MelodySusie drills | Yes, per a range-wide FAQ answer; confirm it for the exact model[3] |
MelodySusie's answer covers its range in general, and pen-style models can differ, so check the listing or manual for the model you choose.
Bits for left-handed techs
Reverse on the drill is only half the setup. The bit has to cut in that direction too. There are two ways to get that:
- A two-way bit. Medicool designed its 5-in-1 carbide bit (CC22) to cut both clockwise and counter-clockwise, and markets it for right- and left-handed techs.[4] One bit works in either direction.
- A left-hand version of a bit. Erica's ATA sells many of its bits in left- and right-hand versions, and its shop has a left-handed filter.[5] Not every bit comes in both, so check each one.
Diamond bits cut with abrasive grit rather than flutes, so direction matters most with fluted bits such as carbide. Check the maker's notes for the bit you have.
One limit to keep in mind: a two-way bit is still a fit question. Medicool says its 5-in-1 carbide bits do not work with its File Stream, Vac File or Pro Vac File Classic machines,[4] even though they are 3/32-inch bits. See do all bits fit all drills.
How to switch safely
- Stop the bit first. Let the handpiece come to rest before you flip the direction, unless the maker's manual says otherwise.
- Lower the speed. A new direction feels different. Start slow and build up.
- Watch the bit's behavior. If a carbide bit skips or chatters, check that the direction matches the bit.
Next
Questions
Do left-handed nail techs need a special drill?
They need a drill with a reverse setting and bits that cut in reverse. Many e-files have forward/reverse, including KUPA's Passport NEXT and Medicool's Pro Power 35K Portable.[1][2]
What is a two-way nail drill bit?
A carbide bit made to cut in both directions. Medicool designed its 5-in-1 carbide bit (CC22) to cut clockwise and counter-clockwise and markets it for right- and left-handed techs.[4]
Are left-hand bits available for every shape?
No. Erica's ATA sells many of its bits in left- and right-hand versions, but not every bit comes in both, so check each one.[5]
Do all MelodySusie drills have reverse?
MelodySusie's FAQ says its drills have forward/reverse and a speed knob, but that is a general answer for the range. Confirm it on the listing or manual for the exact model.[3]