Drill chucks
Drill chucks
EXPERTENWISSEN ABZIEHLEDER
What types of Drill chucks are there?
Different Drill chucks are used in different machines to clamp different tools. A distinction is made between drill chucks with a ring gear and quick-release drill chucks.
Drill chucks with gear rim
Gear chucks are used for holding Drilling tools or cutting tools in all types of drilling machines. Pillar drilling machines bench drills or Column drill presses are usually supplied with ring gear drill chucks. Hand drills are also usually equipped with simple ring gear drill chucks. The tools to be clamped are tightened via the ring gear using a suitable clamping spanner.
Quick-release chuck
A quick-release drill chuck is a tool holder that allows drill bits or other cylindrical tools to be clamped and changed quickly and easily without the use of additional tools such as a spanner. This type of chuck is particularly user-friendly as it can be opened and closed using a simple rotating mechanism. In contrast to conventional gear chucks, the quick-action chuck saves valuable time as the tool can be changed by hand. It is an indispensable tool for craftsmen and is already included in the basic scope of delivery of many drills.
Thanks to the secure clamping mechanism, the drill bit remains firmly and securely fixed in the Drill chucks.
The mode of operation is based on a self-clamping mechanism. Thanks to the so-called re-clamping behaviour, the drill bit is automatically tightened when the machine is turned, which ensures secure fastening. This not only ensures a high clamping force, but also increased safety during work. Well-known manufacturers at the top price level are Albrecht and Röhm. DICTUM offers quick-action drill chucks at an excellent price-performance ratio. The chucks are more than sufficient in terms of accuracy (concentricity) for woodworking and most metalworking. They are supplied with taper arbour MK2 or MK3.
Where are quick-action drill chucks used?
Quick-release drill chucks can be used in a variety of applications, from drills and cordless screwdrivers to lathes and turning lathes, and are particularly popular and practical to use in Column drill presses or Pillar drilling machines bench drills.
These Drill chucks are used in particular in commercial applications where frequent tool changes are required and work processes need to be organised efficiently.
They are available for both clockwise and anti-clockwise rotation, although most standard models of drill chucks are designed for clockwise rotation.
Span and concentricity
It is important to be able to clamp all desired tools in the Drill chucks. The "Clamping range" indicator refers to the clamping range that should always be specified on the drill chuck, e.g. from 0.2 mm or 0.5-16 mm. Another important indicator of a drill chuck is its concentricity. This indicates how precisely the Drill chucks have been manufactured. A distinction must be made here as to whether the respective drill chucks are to be installed in hand drills or in Column drill presses. The smaller the number, the more precise the concentricity. If the machine is hand-guided, a lower concentricity is required than for machine-guided work. Drill chucks in the top price segment offer a concentricity of 0.04 mm. 0.08 mm is sufficient for most uses.
What is the MK2/MK3 Bit holder of a Drill chucks?
The MK2 holder is a standardised cone that enables a stable and precise connection between the Drill chucks and the machine. The Morse taper (often referred to as MK) is widely used in the industry and ensures a tight fit, reducing vibrations and achieving greater precision during machining. This type of Bit holder is particularly suitable for uses that require high torque transmission. The Morse taper is simply inserted and held in place by positive locking.
The advantage of a quick-action drill chuck with an MK holder is that it is compatible with all machines with a corresponding spindle bore, making it an ideal solution for a wide range of work.
There are also corresponding adapter sleeves, e.g. from MK3 to MK2.
How are Drill chucks with MK holders removed?
Depending on the version of the machine, Maturation is carried out very simply by knocking it out with an ejector rod on a lathe, for example, or using an ejector wedge, e.g. on Column drill presses or Pillar drilling bench drills. In both cases, it is best to hit the respective ejector tool with a wood or rubber mallet to release the Chucks. Caution: The chuck must be held with one hand during this step. Also ensure that the machine is disconnected from the power supply to prevent it from being switched on unintentionally and to minimise the risk of accidents.
