Collets, hydraulic chucks and coolant methods
- Click on the links below to learn more about the different methods of locating!
Drills can not be expected to carry out high accuracy drilling or high efficiency drilling unless they are located securely and firmly in a collet or hydraulic chuck.
Double angle collet
High gripping force due to a long section being clamped.
If the centre of the arbor taper and the centre of a screw are not matched, the drill will contact only the one side of the inner walls of the arbor, resulting in poor runout accuracy.
Type of drill:
High speed steel
Solid carbide
Morse taper holder
Type of drill:
High speed steel
Solid carbide
Holding a drill is done by opening and closing three clamp bridges using a handle.
Runout accuracy is low at 0.05mm or larger. Holding force is about one fourth of that of a spring collet.
Under high spindle speeds solid carbide
drills may work loose.
Drill chuck
Type of drill:
High speed steel
Solid carbide
Holding a drill is done by opening and closing three clamp bridges using a handle.
Runout accuracy is low at 0.05mm or larger. Holding force is about one fourth of that of a spring collet.
Under high spindle speeds solid carbide
drills may work loose.
The chuck will not be used when high
precision drilling with a high-speed steel drill.
Side lock holder
Type of drill:
High speed steel
Solid carbide
Uses flatted straight shank drills. Can be used by just clamping a drill with a screw from the side of the holder. A low-cost and simple holder.
High gripping force, therefore suited to heavy cutting
Keyless drill chuck
Type of drill:
High speed steel
Solid carbide
A clamp bridge is opened and closed by turning a cover directly with hands, not using a handle.
To increase fastening efficiency, the keyless drill chuck has a steel ball inside. A mechanism to increase gripping force automatically as cutting force increases.
The chuck will not be used when high precision drilling with a high-speed steel drill.
Shrink fit holder
Type of drill:
High speed steel
Solid carbide
A method in which to locate a drill by heating and cooling the holder. High precision, rigidity and gripping force.
Hydro chuck
Body shell
Shell stopper
Contraction part
Type of drill:
High speed steel
Solid carbide
A method in which to grip a tool shank using elastic (non-permanent) deformation that occurs in a metal sleeve due to hydraulic pressure. High runout accuracy as a drill shank contacts an arbor’s all inner walls with even force.
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