1. Spring Tool Holder
Scope of application: drill bits, reamers, finishing end mills, etc.
Features: Large clamping range; good versatility; high precision.
Key points: Whether the spring collet can shrink perfectly and evenly is one of the key factors that determines the runout accuracy; the bearing nut can significantly reduce the torque on the collet during locking. The runout accuracy level of the spring collet at 4D represents within 20 μm. Ordinary grade ordinary ER jacket within 10 μm. Precision grade precision ER jacket within 5 μm. Ultra-precision. A few manufacturers have within 3 μm. Top high-precision NBC jacket.
2. Hydraulic tool holder
Working principle: Use hydraulic pressure to shrink the inner diameter of the tool holder to clamp the cutting tool.
Scope of application: high-precision processing of end mills, carbide drill bits, diamond reamers, etc.
Features: Easy to operate, only one T-shaped wrench can be tightened, which is the simplest clamping method among all tool holders; the accuracy is stable, the tightening force does not directly act on the clamping part, even new operators can use it stably Clamping; completely waterproof and dustproof; good anti-interference performance. Some slender hydraulic tool holders on the market are comparable to the anti-interference performance of heat shrink tool holders.
3. Heat shrink tool handle
Working principle: The difference in thermal expansion coefficient between the tool handle and the cutting tool is used to clamp the cutting tool.
Scope of application: Processing occasions with high interference conditions.
Features: Good anti-interference; small clamping range, can only clamp cutting tools of one size; good initial runout accuracy (declines
quickly with the increase of heating times); requires a special heating and cooling device, poor safety, and difficult to operate The personnel requirements are high.
4. Powerful milling cutter holder
Working principle: The cutting tool is clamped by compressing the tool handle body through the nut.
Scope of application: Heavy cutting of end mills.
Features: high rigidity; strong clamping force, the largest among all clamping tool holders; poor interference resistance; (some manufacturers have also launched powerful milling cutter holders with a nut outer diameter of only 32mm) runout accuracy Generally, it is generally below 0.02mm, but some manufacturers have achieved 5~10μm.
Key points: Whether the elastic deformation is uniform and whether the amount of shrinkage is sufficient. (The chuck's thickened design can increase rigidity and withstand heavy cutting by end mills.)
Typical case: The powerful milling cutter holder adopts a very unique slit structure, which can uniformly deform the chuck, and has strong clamping force and stable runout accuracy.
5.Side Lock Tool Holder
How it works: As the name suggests, the cutting tool is locked via a side set screw.
Scope of application: Used for rough machining of drills, milling cutters, etc. with flat shanks
Features: Simple structure and large clamping force; but poor accuracy and versatility.
