How To Lengthen A Drill For A Hammer Drill

Diamond drill bits for drilling holes in concrete for rock drill
Features of concrete drills for rock drill. What are the drills and the types of their fastening in the hammer drill cartridge. Properties of drill bits for large holes.

Diamond drill bits for drilling holes in concrete for rock drill

There is no doubt about the advantages of such a tool as a hammer drill, especially when constructing various holes, niches and openings in concrete. True, the quality and speed of the work performed by this tool also depends on the type of drills chosen for them.

Basic concept

A drill, designed for drilling holes in concrete and other hard building materials with a hammer drill, resembles a steel bar, consisting of a cutting tip, a mounting shank and a spiral located between them.

There are two or four longitudinal grooves on the shank for attaching the drill to the hammer drill chuck. The cutting part of the tip can be diamond-coated or victorious.

Drills are classified according to specific design parameters of the tips, the geometry of the spiral part, type of tail, diameter and working length, as well as the power of the tool on which they can be installed.

Rotary hammer drill bits are used for construction and assembly, dismantling and repair work with building materials made of concrete, brick, as well as artificial and natural stone.

Difference from conventional drill

The only thing that these tools have in common is their tips, which can have the same cutter designs and types of diamond and victorious soldering.

Basically, the drill differs from an ordinary drill in the special design of its shank. It has grooves of a certain depth located along the shank. They are designed to be securely mounted in a rotary hammer drill chuck. An ordinary drill does not have such grooves and is designed to work only with a drill.

Depending on the depth and the number of longitudinal grooves of the shank, the drills are divided into 5 fastening systems.

Drills have a higher rigidity, since during drilling in hard materials, they simultaneously exert an additional shock load on them, that is, they also perform the function of a jackhammer.

Such hammer drilling increases the rate of penetration of the drill into the depth of the work material several times compared to a drill with a similar tip.

Rock drill bit sizes

Drill sizes are mainly characterized by three dimensions. Diameter, main and working length.

The choice of diameter depends on the planned task:

  1. For work at home. 6, 8 and 10 mm.
  2. For fastening large systems and structures. 10 and 20 mm. In the first case. For the dowel, in the second. For the anchor bolt.

The choice

When purchasing drills for a perforator for concrete, it is worth remembering that this is a consumable item that cannot be repaired. That is why they are sold in kits.

Specific hammer drill bits for concrete

Specific drills used in certain jobs include:

  • Crown. Used for laying electrical wires;
  • Chisel, spike-like and easily destructive concrete;
  • Flat chisel. It is used for point breaking of concrete;
  • Channel drill. Greatly facilitates the work of conducting electrical wiring.

What are the drill bits for a hammer drill

Before buying, you should compile for yourself a short list of parameters that are really important for understanding which drill for a hammer drill you need to choose:

Drill sizes / dia. This indicator depends on the type of work and the material being processed;

Shank. There are several standard sizes. It is important that it is compatible with the existing instrument;

Manufacturers. There are first-class drills produced by renowned manufacturers. They are not cheap, but reliable and durable. It is worth purchasing them for responsible and professional work. If you have to drill several holes, then it is better to find cheaper components. There are companies that offer inexpensive consumables for power tools;

Soldering. At the very tip of the drill there is a soldering from a hard special alloy. This tip increases the drilling speed and keeps the tool longer;

Types of grooves. The spiral grooves on the bore can be of different types. For a professional unit, they are made with a ledge at the bottom or under a bevel. In everyday life, the grooves are semicircular.

The main parameter by which the nozzle must be selected is the shank. It is called the lower part of the rod, clamped in the tool holder. They are released according to several standards:

Sds-plus. This size is 10 mm in diameter and recessed into a 4 mm socket, such as Bosch SDS-Plus 12×165. It is used for household appliances of low power;

Sds-max. It is used in professional high-performance tools, ∅18 mm, and the clamping depth in the chuck is 9 mm, like Bosch SDS-Max 16×400 / 540 mm;

Sds-top. Practically not used (except for some old Bosch models) format with a diameter of 14 mm;

Sds-quick. Used exclusively for Uneo and UneoMax units from Bosch, in hexagon configuration.

If it suddenly turns out that the hammer drill has an SDS-max connector, and the drill has an SDS-plus, do not worry. There are special adapters that will allow you to use a different standard size.

how to lengthen a drill for a hammer drill

Important information: Which of the 2 types of rock drills is better. Vertical or horizontal?

How to choose a drill for a hammer drill: 5 tips

Punch drills are officially produced by not so many companies. But in any building supermarket, you can find dozens of brands offering accessories for punchers. It is not worth buying the first set that comes across, focusing on the advice of the seller. It may well be of poor quality, or even completely fake.

In order not to waste money, it is better to first familiarize yourself with the key parameters and functional characteristics of the drills, read the opinions of users and select a tool that has earned the trust of specialists. So how to choose a drill for a rock drill?

What are the attachments

Many craftsmen value a hammer drill for its versatility. It can easily replace a drill or bump stop. You just need to insert the corresponding attachment. The set offers several types of tips:

Boers. They can be centering and traditional. The former are adapted for puncture accuracy, without breaking the hole. Traditional, cross brazed, suitable for all materials and more suitable for chiselling.

Crowns. Ideal tool for wall chipping. If you need to hide the wiring or hollow out a place for an outlet, then it is better to use crowns. Varieties of crowns: