7 Best Drill Bit Sharpener | Sharpen 20 Bits Before Coffee

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The electric sharpener that spans a 3.0x wider bit range than the budget option, from 3/32″ up to 3/4″.

The DD750X is the step up when your bit drawer includes the big stuff. While the GOODSMANN below tops out at 25/64″, this unit carries twist bits from 3/32″ all the way to 3/4″ — a full 3.0x capacity gap that means large, expensive bits get revived instead of replaced. It’s also noticeably more compact than the DD500X: the 750X measures 11 x 5.75 x 6.5 inches versus the 500X’s 13.75 x 5.75 x 11.75 inches, a 25% difference in that dimension that makes bench storage easier. The angle range opens up too, from 115° to 140°, so you can match the point to the material you’re drilling.

In use, it earns its reputation as a fast worker. Owners mention sharpening hundreds of bits — from 3/4″ down to small ones — without a single issue, and the two grinding wheels (180 and 100 grit) show no wear even after heavy use. The split point function reduces tip wear and improves cutting performance, and the 3-year warranty covers defects in workmanship or design. It even puts an edge back onto broken bits, which is where a lot of other sharpeners give up.

What owners say repeatedly: it pays for itself. Instead of buying new bits every time one dulls or chips, you grind it back to working condition in minutes. There’s a small learning curve, and a few note the bottom tray fits loosely and lets dust escape, plus the angle adjustment slide is stiff. But the functionality is what wins people over — hundreds of owners single out how well it performs on both small and large bits.

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The entry-level electric sharpener that handles common 1/8″ to 25/64″ bits for a fraction of the premium cost.

If you’re not ready to commit to a Drill Doctor, this GOODSMANN unit covers the most common bit sizes — 1/8″ to 25/64″ — at a budget-friendly price. It runs at 1350 RPM or 1700 RPM depending on the setting, which is plenty for restoring a standard twist bit quickly. The body is high-strength engineering plastic, and customers note the sharpening stones are decent quality for the price. It works on both metric and standard bits, which is a plus if your set is a mix.

The catch is in the details. Several owners note the bit-size placement is off, and the grinding wheel needs to be positioned all the way up for smaller bits — and when it’s in that position, the wheel rubs the case. The instructions are skimpy and in one case incorrect about how to access the sharpening stone. It’s workable, but there’s a fiddling factor to it that the pricier electric units eliminate.

There’s also a durability question: the grind stone isn’t replaceable, so once it wears out, the unit’s useful life ends. For a light user sharpening a handful of frequently used bits, reviewers point out it sharpens fast and gets the job done. For anyone planned to sharpen in volume or run a professional shop, the non-replaceable stone is a real limitation to weigh.

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The heavyweight 18.3-pound collet sharpener that owners say leaves a Drill Doctor in the dust.

Some sharpeners feel like toys in your hand. Not this one. The VEVOR MR-13A weighs 18.3 pounds and is built from 45# steel (a medium-carbon steel), so it stays put on your bench. Owners describe it as “well built, no plastic or light duty components.” It uses 11 collets covering 3mm to 13mm bits, and the CBN grinding wheel is made for high-speed steel — the material most twist bits use. One owner restored a burnt, nearly useless bit in under a minute, so you can rescue bits you thought were done.

The motor runs at 4500 RPM with an internal fan to keep things cool, and the three-step process is easy to learn — collet selection makes it fast and accurate. The claim about turning bits “better than new” isn’t marketing fluff here: reviews tell of dull Milwaukee bits cutting hard metal easily after about 2 minutes on this machine. The split point option prevents the bit from wandering, which is a common problem with hand-sharpened tips.

What’s the catch? The manual is minimal — owners point to YouTube tutorials as the real instruction book. And it’s unapologetically heavier machinery, so it’s a bench fixture rather than something you tote around. But for anyone sharpening bits in quantity, the process is “pretty much fool proof” once you’ve watched one video. It also outperforms plastic alternatives noticeably, which is why owners specifically call out its edge over port-style electric sharpeners.

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The all-metal collet sharpener that produces bits sharper than factory in under 30 seconds.

Owners say this machine makes every other sharpener feel inadequate. The MRCM MR-13A uses the same MR-13A design as the AR and VEVOR models above — 13 collets from 3mm to 15mm, a cubic boron nitride wheel, and 95° to 135° point angle adjustment — but adds an all-iron housing that won’t deform under pressure. Its DC motor spins at 4400 RPM, and shoppers say bits come out “sharper than factory” after a pass that takes under 30 seconds. If you want the most durable build of the three, this is the one to pick.

The critical difference from the port-style electric units is consistency. Because each bit is held in a precise collet, every grind comes out identical — no hand-steadying, no angle guessing. Owners with hobby machine shops call it the best purchase they’ve made, and one says it makes the Drill Doctor “look primitive” in comparison. The split point function works even on small bits, which is where many sharpeners struggle.

A few honest notes: the user manual is vague, and there’s no nameplate or UL listing, which matters if you need that for a commercial or insured space. The setup dial can arrive slightly off, but it’s adjustable. The lack of detailed center-adjustment instructions means you’ll want a tutorial video handy. None of that dims the enthusiasm — owners rate the quality and performance as exceptional, with the only real recurring complaint being the instructions.

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The 20.1-pound production sharpener with 18 collets and two grinding wheels for CNC shop duty.

This is the sharpener that lives on a CNC shop floor, not in a garage cabinet. The MR-20G carries 18 collets covering 3mm to 20mm — the widest range in this lineup — and ships with two collet chucks, one for 3-13mm and another for 14-20mm. It’s also the only model here with two grinding wheels: a CBN wheel (for high-speed steel) and an SDC wheel for alloy tungsten steel. That dual-wheel setup means you can sharpen most bit materials without swapping machines.

At 4500 RPM with a 45# steel body, it’s built for repeatable, consistent production grinding. Owners running CNC shops say it’s fast and dependable, and the tight collet fit gives repeatable results across hundreds of bits. The lip relief angle is DIY-adjustable through positioner pins, so you can grind four different relief angles to match different cutting needs. That’s a level of control the smaller models simply don’t offer.

The honest limits: there’s no true split point function — web thinning works but isn’t the same thing — and the manual is poor, especially for the relief station, which needs adjustment when you change setups. Small bits under 1/8″ can’t be indexed at all, and owners with very large bits wish it went up to 1 inch. But for production sharpening from 3mm to 20mm, it’s a dependable workhorse. One owner’s summary: “Dependable production tool.”