0.45 мм Мікросвердла короткої серії DIN 1899A RN

Stubby Micro Drills DIN 1899 A RN

Stubby micro twist drills DIN 1899 A in RN execution are designed for drilling small-diameter holes in metal components. Their compact design helps limit tool deflection, while accurate clamping and controlled feed are essential for reliable drilling at small diameters.

Applications:

Used for drilling small through holes and blind holes in precision components, miniature parts and fine mechanical assemblies. Suitability for a particular workpiece material depends on the drill material, coating and manufacturer’s recommendations.

Operating Principle:

The rotating cutting edges remove material while the spiral flutes guide chips out of the hole. At small diameters, even minor spindle runout or misalignment can affect hole accuracy and increase the risk of drill breakage.

Diameter and Length:

The drill diameter determines the nominal hole size. Overall length and flute length vary with the selected size. The short design helps reduce bending, but the small cross-section still requires careful handling and minimal tool overhang.

Cutting Section:

The fine cutting edges and narrow flutes require consistent feed and effective chip evacuation. Chip accumulation can increase torque and cause breakage. When drilling deeper holes, use a withdrawal cycle appropriate for the drill and workpiece material.

Tool Geometry:

The product designation is DIN 1899 A RN. Specific point and helix angles, shank dimensions, cutting material and coating should be checked in the specifications of the selected drill.

Practical Recommendations:

Use a precision chuck or collet suitable for the shank diameter, and check spindle runout before drilling. Secure the workpiece and provide an accurately positioned starting surface. Apply a smooth axial feed, avoid lateral force and use suitable lubrication or cooling.

Specifications:

• Tool type: micro twist drill
• Series: stubby
• Standard: DIN 1899 A
• Execution: RN
• Diameter: depends on the selected size
• Overall length: depends on the selected size
• Flute length: depends on the selected size

Cutting Characteristics:

Small cutting diameters make these drills sensitive to runout, excessive feed and chip blockage. Stable clamping and controlled chip removal support consistent drilling performance.

Cutting Parameters:

Select spindle speed and feed according to the drill diameter, tool material, workpiece material and hole depth. Small diameters require precise feed control and equipment capable of maintaining suitable speed with low runout.

Suitable Operations:

• Small-diameter through holes and blind holes
• Drilling miniature mechanical components
• Precision work with limited drilling depth
• Operations requiring a compact drill

Limitations:

Micro drills have limited resistance to bending and torsional overload. They are not intended for side cutting or enlarging holes through lateral pressure. Available reach and drilling depth are restricted by the selected tool dimensions and chip evacuation conditions.