1. Drill chuck
Drill chucks are the main parts of electric drills, which account for 10% -15% of the cost of electric drills. Key drill chucks are common, and the development and production of light-weight, hand-tight drill chucks have also achieved remarkable results.
An important indicator for hand-tight and self-tightening drill chucks is that the output torque of the drill chuck can be greater than 90% of its input torque.
High-end drill chucks are mainly used in demanding professional power tools, bench drills and other occasions. The demand for high-performance self-locking drill chucks and heavy-duty wrench drill chucks is increasing. The high-performance self-locking drill chuck has the characteristics of high precision, high technical content, high added value and high benefit. It is mainly matched with the impact electric drill of 850W and 24V DC impact electric drill in professional power tools.
Since the quality and performance of power tools are improving, it is required to perform drilling operations reliably in vibration and impact situations. Therefore, the matching drill chuck is required to have a locking function to ensure that the drill and other tools held by the electric drill are not loose. Off. Global self-locking drill chucks are expected to demand about 19 million units by 2010.
2. Features of high-end drill chuck
High-end hand-tight, self-tightening drill chucks for electric drills have advanced performance and features include:
The chuck housing is made of engineering plastic, which is light in weight and environmentally friendly; it also has a metal chuck, which has high strength and good rigidity; the coaxiality of the chuck is very high, which ensures the processing accuracy; the hexagonal head on the chuck is very easy Installation, tightening and disassembly of the chuck; the top of the chuck has a rotating dust cover, which has the dual function of preventing dust and debris from being embedded in the chuck and the operator can be used to support it to make the work of the drill chuck more stable After special hardening treatment, the strength is extremely high. When the drilling force is too large, the drill bit rotates in the jaws, but the jaws will not be damaged;
The chuck has the function of clamping force signal. When clamping the drill bit or working, when the clamping force reaches a certain value, the clamping hair makes a “click†sound, telling the user that the drill bit is fully clamped and the tool can be used absolutely safely. As the clamping force increases, the drill can emit three clicks, corresponding to three different clamping forces. The drill can be used safely in any of the three clamping forces.
This clamping force signal can make the drill chuck work in the best clamping force and safe state, which can greatly extend the life of the chuck. And the clamping force signal can give the user a very good feeling, making it extremely easy to determine whether the chuck has reached the best clamping force and safe state, thereby avoiding insufficient clamping force, drill bit slippage and excessive clamping force damage Drill accident.
The chuck is also provided with a dust leakage hole, which can leak the dust and debris embedded in the chuck during the work process, thereby ensuring the operability of the tool and extending the service life of the chuck and the drill.
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