12 Long series straight shank drills High helix DIN 340 RW

Long Series Straight Shank Drills High Helix DIN 340 RW

DIN 340 long series straight shank drills in RW execution combine extended reach with high helix flute geometry. They are designed for drilling suitable soft, ductile metals where access and effective evacuation of long chips are important.

Applications:

Used for drilling through holes and blind holes in suitable aluminium and other non-ferrous alloys, including recessed drilling locations that shorter tools cannot reach. Compatibility depends on the specific workpiece alloy, drill material, surface finish and manufacturer’s recommendations.

Operating Principle:

The rotating cutting edges remove material while the high helix flutes guide chips away from the cutting zone. This geometry supports chip evacuation in suitable long-chipping materials. The extended length requires accurate alignment and controlled feed to limit bending and maintain the drilling direction.

Diameter and Length:

The drill diameter determines the nominal hole size. Overall length and flute length vary with the selected size. The long series design provides greater reach than comparable jobber-length drills, while usable drilling depth also depends on chip clearance, cooling and setup rigidity.

Cutting Section:

When drilling ductile metals, long chips can accumulate in the flutes or adhere to the cutting edges. Suitable lubrication and an appropriate withdrawal cycle help maintain chip flow. Leave sufficient flute length outside the hole for chips to escape.

Tool Geometry:

The RW execution features high helix geometry. DIN 340 specifies the dimensional series for long twist drills with straight shanks. The exact helix angle, point angle, drill material and any coating should be checked in the specifications of the selected tool.

Practical Recommendations:

Secure the workpiece and clamp the straight shank with the minimum overhang required for access. Check spindle runout and use suitable starting-hole preparation where necessary. Maintain a steady axial feed, apply cutting fluid appropriate for the alloy and reduce feed near breakthrough to limit grabbing.

Specifications:

• Tool type: high helix twist drill
• Series: long
• Standard: DIN 340
• Execution: RW
• Shank type: straight
• Flute geometry: high helix
• Diameter: depends on the selected size
• Overall length: depends on the selected size
• Flute length: depends on the selected size

Cutting Characteristics:

High helix flutes support chip evacuation in suitable soft, long-chipping metals. The extended tool length increases sensitivity to deflection and vibration, making stable clamping and controlled engagement essential.

Cutting Parameters:

Select spindle speed and feed according to drill diameter, tool material, workpiece alloy, hole depth and cooling conditions. Follow the manufacturer’s cutting data and adapt the withdrawal cycle to prevent chip packing.

Suitable Operations:

• Drilling suitable aluminium and non-ferrous alloys
• Accessing recessed surfaces and distant drilling locations
• Producing through holes and blind holes within the tool’s working capacity
• Drilling long-chipping materials where additional reach is required

Limitations:

High helix geometry is not suitable for every metal. Confirm compatibility before machining hard or short-chipping materials. Avoid lateral loads, excessive overhang and chip blockage. Flute length alone does not determine maximum drilling depth. Thin workpieces require secure support and careful feed control at breakthrough.