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The Daily Insight

Are Drill Doctor any good

Author

Robert Spencer

Published Feb 23, 2026

We expected that if the Drill Doctor could re-grind our bit it would take a while … and it did, but in the end it did a pretty nice job. We did find that using the unit was a little bit slow on larger bits and it takes a while to get used to using, but it did fix up our rack of dull bits.

How much does a Drill Doctor cost?

Price$49.95$139.95Ideal for:HobbyistProfessionalAdjustable Chisel & Relief AngleNoYesDrill Bit TypesCarbide, Cobalt, High-Speed Steel, Black Oxide, TiN-Coated, and MasonryCarbide, Cobalt, High-Speed Steel, Black Oxide, TiN-Coated, and MasonryTwist Bit Point Angles118º115º to 140º

What is the difference between 118 degree and 135 degree drill bits?

A 118 is standard for drilling into soft material like wood and aluminum. It has a more aggressive tip and a smaller chisel. A 135 is standard for drilling into harden material such as stainless steel. It has more pitch so it’s a lot flatter and has a longer chisel.

Who makes Drill Doctor?

Darex L.L.C. is an American manufacturer of industrial bit sharpeners, and are currently based in Ashland, Oregon. Darex L.L.C. owns two other brands, Work Sharp Tools which creates knife and tool sharpeners and Drill Doctor which creates hobbyist drill bit sharpeners.

What is split point drill bit?

Split Point Drill Bits – this type of bit usually has 135 degree included angle points and are designed to cut metal. … This reduces the amount of pressure needed to make the drill cut. The Split Point is also self centering which means the drill starts cutting exactly where is comes into contact with the material.

Who owns Darex?

Fourth generation family owner and president, Matthew Bernard recounts how his great grandfather, grandfather, father and their wives made the move and started Darex in 1973. “We have a lot of smart people in our company—200 in total—and they all are here because they love to live in Southern Oregon,” Matthew smiles.

Where is Drill Doctor manufactured?

We are proud to design and assemble our tools in the USA. You work hard for your money, and your tools are an investment. We are dedicated to creating quality tools with quality components and backing them with the best customer service you’ll never need.

Can Drill Doctor sharpen masonry bit?

You can use the Drill Doctor to sharpen virtually every drill bit that you could possibly need including high-speed steel, TiN coated, cobalt and even masonry bits.

Where are work Sharp products made?

We are proud to design and assemble our tools in the USA. You work hard for your money, and your tools are an investment. We are dedicated to creating quality tools with quality components and backing them with the best customer service you’ll never need.

What's the best angle for a drill bit?

For hard materials such as steel and stainless, 135-degree bits are best. The shallow angle allows the bit to cut into the material without dulling quickly, however that same shallow angle makes for a bit that wants to walk around, requiring a center punch. The 135 angle is much flatter, as you can see here.

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What is the best angle to sharpen a drill bit?

Aim for that 60-degree angle, and an angle and point that’s the same width on both sides of the drill bit, to enable the tool to bore straight holes.

How can you tell if a drill bit is sharp?

Here is the best and only way to determine if a small diameter twist drill is sharp. Hold the twist drill between your fingers and rotate it against a finger nail with a moderate amount of pressure. A sharp drill will cut into the nail. Try it with a few new twist drills and you will see how a sharp drill behaves.

Is Titanium stronger than black oxide?

Hardness While titanium is a pretty hard material, titanium drill bits are only coated with a thin layer of titanium nitride, which erodes quickly. … Black oxide, on the other hand, is a regular HSS bit heated to 950 Fahrenheit for black oxide finish, so it is not as hard as titanium, let alone cobalt drill bits.

Is cobalt or titanium drill bits better?

Cobalt bits tend to be quite expensive. However, they are more durable and long-lasting than other options, including titanium. Because of this, they can often save you money in the long run.

What is a center drill?

Drill & countersinks, sometimes referred to as center drills are meant to create a conical hole for “between centers” manufacturing processes (typically lathe or cylindrical-grinder work). That is, they provide a location for a (live, dead, or driven) center to locate the part about an axis.

What is drill gauge?

A drill gauge is a device used to identify the size of a drill bit. It can be made from steel, aluminum, plastic or wood, and contains a series of holes that represent various drill bit sizes. Each hole is marked with a measurement based on its size.

What is a parabolic drill used for?

Primary Uses of Parabolic Drill Bits They can drill starter holes for screws, partial holes for dowels and clear holes for bolts. However, parabolic drill bits are most often used for deep hole drilling.

What angle is a drill point?

The most common included angles for drills are 118° and 135°. These angles are an artifact from the time when drilling was largely a manual process, and the drill bits were conventional conical shapes.