Stone Drill Comparison 2018

Purchase advice for Steinbohrer comparison or test 2018

  • Stone drills are spiral drills with a small hammer at the top. With this tip, they optimally mince rock in masonry and stone slabs and thus produce straight drill holes.
  • The steel they are made of and how they are coated determines whether a masonry drill is better suited for brick, concrete or natural stone.
  • There are solid bore stone drills for conventional chuck but also numerous models with so-called SDS drill shafts. SDS drills have small notches, which is why they only fit into special SDS chucks.

Stone Drill Comparison 2018: drill

1. Why you should only take stone drills by stone

Stone Drill Comparison 2018: stone

Hammer drill: The special tip "hammered" a clean hole in the wall.

Even if you call a very robust wood drill or metal drill your own, it is recommended to use the appropriate drill type for stone drilling.

Thanks to a special boring head, even cheap stone drills ensure a straight borehole. The hammer-shaped tip first cuts into the stoneuntil it is deep enough and the "hammer tip" in the hole can smash the stone.

The "hammer tip" of the stone drill does the real work: The drill head must be particularly robust and sharp, The blades that spiral from the tip into the drill shank hardly need to be sharp, as they mainly remove the debris from the wellbore.

Stone by stone: Drills for metal or wood do not have a "hammer head". They would either dull or tilt in the stone and possibly break.

If a drill breaks while your drill is hammering at 50 Newton-meters against the wall, that's not without risk: you could slip off and get hurt.

So you better always take a stone drill for stone.

Stone Drill Comparison 2018: drill

The spiral edges bring dust and debris out of the hole.

If you are looking for suitable drills for the other materials, you will find it here:

  • For wood drill comparison
  • For metal drill comparison

2. Which types of stone drills are there?

Although some rock drills work better with concrete than others, they are not classified in categories. However, you can meanwhile make different types on the basis of the drill heads: double-edged and four-edged drill bits. We will discuss the different types of drill shank in our purchase advice below (Chapter 3).

If you want to buy a masonry drill, you will most likely encounter drills with two cutting edges. Due to the blade shape, you only have minimal performanceso that they could well emerge as a Steinbohrer test winner from a test or comparison. The stone-boring-shank-types are discussed in chapter 3.4. on.

wellheadparticularities
two-edged

Stone Drill Comparison 2018: drill

  • easy to sharpen yourself
  • mostly cheap
  • often with a smooth ("standard") shaft

good for:

  • Home improvement projects (eg holes for shelves)
four cutting edges

Stone Drill Comparison 2018: comparison

  • especially uniform boreholes
  • allows very fast drilling speeds
  • often with SDS shaft

good for:

  • Professional drilling (for example, deep holes in extra solid stone)

3. Purchase advice for stone drills

Stone Drill Comparison 2018: stone

In stone drill sets are usually drills with 5, 6 and 8 mm in diameter.

Stone drills are usually in sets. Individual drills are often found only in hardware stores like Hornbach, Obi or Bauhaus. Our stone-drill comparison 2018 advises you equally: to stone drill sets or individual pieces.

3.1. diameter

Drill diameters do not refer to the thickness of the drill stem, but to the size of the hole that the drill head strikes. The diameters are given in millimeters (mm).

In stone drill sets are usually represented the standard sizes of 2 - 12 millimeters, Conventional dowels, which are included with most kitchen cabinets (e.g., from Ikea) have diameters of 5, 6 or 8 millimeters. These sizes should also be included in smaller sets, which may only be 6 pieces.

Drills should also be accurate have the same diameter as the dowels to be sunk: So a 6 mm drill for a 6 mm dowel. Most complete drill sets (whether from Bosch or Hilti) include accessory drill sets in the most popular sizes.

3.2. metal

Stone Drill Comparison 2018: comparison

The tip with the small "wing ends" made of carbide is inserted into the drill body and soldered.

For stone drills, the metal they are made of is not as crucial as metal drills, for example. Stone drills also contain two different types of metal: The "hammer tip" consists of carbide (HM) and is soldered to the "drill body".

Carbide resists high temperatures, is extremely hard and not flexible. The Drill bodies, on the other hand, are made of a metal that is easily bendableso they do not break too fast. This metal part varies with many drill models (hereafter referred to as "drills").

Steeled body

Stone Drill Comparison 2018: 2018

Be careful with exterior walls: An inferior drill tilts on steel in the concrete.

As long as the drills are not made of iron, You can neglect this aspect in average drilling projectsbecause if you only drill in interior walls, for example, the drill will not be subjected to such high forces.

However, if you want to perforate outer walls and do not know if they contain metal mesh of reinforced concrete, you should pay more attention to the metal of your drills. normal Stone drills from any drill set would tilt on the steel and possibly break.

Steel alloy drills are much more robust and do not go to steel bars broken. Typical alloys are, for example, chrome vanadium steel (CV) or chromium-molybdenum steel (CM). With them, soft metal such as aluminum sheet can be perforated to a limited extent.

Importantly, steel drills are not copies with a vanadium or molybdenum coating, but are made of genuine alloy. You will rarely find stainless steel for drilling stones because the metal is too expensive for this type of drill.

Stone Drill Comparison 2018: comparison

The steel mesh in the reinforced concrete is a stress test for the best stone drills.

Coating is too superficial

If a drill is coated, it will loosen over time and make the drill prone to rust. Besides vanadium and molybdenum, cobalt is also a popular coating material. For an alloy, the drill is stainless through and through and sturdy steel. CV drills are widely used in the field of rotary hammers with SDS shafts. They are ideal tools for a concrete drill test. In chapter 3.4. Read more about the advantages of SDS drills.

In addition, you drill much longer in concrete than with interior walls made of bricks. Longer drilling heats drills until they glow, In the case of low-quality drills, this may solve the coating if they are not made of a high-quality alloy.

Normal wear: For small rock drill sizes, it's not uncommon for them to break quickly. This is due to the enormous forces that occur in the impact screws. There it is quite normal if a small and thin drill breaks through, It is not a sign of poor quality.

3.3. rock expert

Stone Drill Comparison 2018: comparison

The more pronounced the spirals of the stone drill, the better he carries the drill dust out of the borehole.

If you already know in advance that you want to work mainly on a specific building material, it is worth taking a look at specialized drills. Especially for concrete or natural stone, you need Drills withstanding high temperaturesbecause these materials are very hard and you need to drill long.

Brick or other masonry types are not so hard, but they dust more. With them, drills are an advantage which transport the accumulated drilling dust out of the borehole very efficiently, Especially very long stone drills have pronounced spirals to optimally remove the drilling dust. They are similar to the long snake burs for wood.

Stone Drill Comparison 2018: 2018

A touch of diamond sticks to the edges of the tile drills.

Diamonds are the tiles best friends

For tiles, you need especially sharp drills with sharp drill heads, otherwise the entire tile splinters. Tile boring drills are sometimes also declared on the packaging as tile or diamond drills.

The tile specialists are set up like a hole saw with sharp-edged diamond splinters at their edges.

Large caliber: core drill

Who does not want to sink a dowel but a flush-mounted socket, needs a larger caliber: the core drill. These are in principle also hole saws that specialize in masonry.

3.4. Drill shank: classic or SDS?

SDS-diversity

Stone Drill Comparison 2018: drill

After the patent expired from Bosch's developed "plug-in-turn-seat" (SDS) system, other manufacturers also developed SDS variants. Today there are these types:

  • SDS-Max
  • SDS-Plus
  • SDS-Quick
  • SDS-top

The best stone drill will not make you happy if it is incompatible with your cordless drill. The drill shafts of stone drills differ greatly. In addition to the classic smooth drill shanks, there are also the so-called SDS drill shafts.

Good in (drilling) food

Is this Chuck not specially named, then it takes without problems the conventional drill shafts on. Chuck (also tool holder) is the front part of a drill, in which the drill is inserted.

Current models usually have a so-called "keyless chuck"into which the drill can be released from the feed with bare hands. For older drills, you need the "chuck key", which looks like a small gear with a handle.

SDS chucks are usually operated like "normal" keyless chucks, but they only accept drills that also have an SDS shank. In the SDS shaft are Special cavities into which the SDS chuck "reaches" and hold it so well.

If you have a machine with an SDS tool holder, then you should absolutely pay attention, which kind of SDS is present, because within the SDS shafts there are differences and the respective SDS types are not compatible with each other.

There are also hex-shank drills that are often mentioned in various cordless screwdriver tests, but they are only suitable for minimal holes and are negligible.

Advantages and disadvantages of the SDS drill compared to the classic drill shank:

  • change very fast
  • sits very safe
  • enables extremely high power transmission
  • is only compatible with special SDS drill chuck
  • even SDS systems are not compatible with each other
  • usually expensive

4. Wrong plug brings evil

Stone Drill Comparison 2018: 2018

Universal dowels spread apart or clump on the other side of the wall.

For the small mirror cabinet in the bathroom usually the supplied universal dowels (also expansion dowels), These are universally applicable according to their name. But if you want to hang extra heavy items (such as mirrors), the traditional expansion dowel may be too weak.

Specialized dowels keep better in their respective masonry varieties, This also recommends the Stiftung Warentest, which did not do a rock drill test, but did a dowel test.

Typical wall types with possible dowel specialists we have put together here:

Wall-typerecommended dowels
concrete
  • (long) universal dowels
Gas and aerated concrete
  • Porous concrete dowels, gas concrete dowels
plasterboard
  • Spiral dowels, cavity hinged dowels, hollow metal dowels, spring-loaded dowels
hollow tile
  • Universal dowels, long-shaft dowels, chemical dowels
stone
  • (long) universal dowels

5. Frequently asked questions about stone and concrete drills

5.1. How does a masonry drill work?

Stone Drill Comparison 2018: stone

Stone drills smash the stone in the borehole. The result is only dust and splinters.

Like other drills, the stone drill cuts the material with the point. But how he does that differs from wood or metal drills: metal drills pick up a chip of metal, just as wood drills pick up a chip of wood, however, the stone drill cuts off the rock.

Then the small hammer-shaped wings of the stone drill bit shatter the rocks. Leftovers will slip backwards and become at best transported out of the hole by the spiral shape of the drill body, This process is always the same, whether you drill in stone or tiles.

5.2. What do rock drills look like?

Stone drills quickly recognize their "winged" drill heads. On the top sits a small sharp plate whose edges are slightly overhanging. In Steinbohrer sets are usually hardly stone drills, which are very long, but only up to about 120 mm.

5.3. Which drill is the right one for which rock?

For most walls it does not matter which material the stone drill consists of. Only with concrete exterior walls you should pay attention to particularly high-quality drill, since Metal is often hidden in such walls and the concrete itself is also very hard.

Right size: It is important when drilling that the stone drill has the appropriate diameter. It should be the same size as the dowel.

5.4. Which manufacturers and brands are there?

In addition to the well-known manufacturers Black + Decker, Bosch, Festool, Hilti or Proxxon, there are also many other unknown manufacturers and brands.

This includes, among others, good drills from Keil, Alpen or KWB. Also Wolfcraft, who is otherwise known for garden tools, manufactures stone drills, which are found in various stone drill tests and comparisons.

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