4.1 мм Свердла довгі кобальтові по металу DIN 340 GT100 HSSCo

Long Series Straight Shank Drills DIN 340 GT100 HSSCo

DIN 340 long series straight shank drills in GT100 execution are made from cobalt-alloyed high-speed steel (HSSCo). Their extended length provides additional reach for drilling metal components, while the cutting material offers increased resistance to softening at elevated temperatures compared with conventional HSS.

Applications:

Used for drilling through holes and blind holes, accessing recessed surfaces and machining components where shorter drills cannot provide sufficient reach. Select workpiece materials according to the manufacturer’s application data for the GT100 execution and the specific HSSCo grade.

Operating Principle:

During rotation, the cutting edges remove material while the spiral flutes carry chips away from the cutting zone. HSSCo helps maintain cutting edge hardness as temperature increases. The long design requires accurate alignment and stable feed to limit deflection and maintain the drilling direction.

Diameter and Length:

The drill diameter determines the nominal hole size. Overall length and flute length depend on the selected size. Extended length increases access, but usable drilling depth also depends on chip evacuation, cooling, tool overhang and setup rigidity.

Cutting Material:

HSSCo contains cobalt alloyed throughout the high-speed steel rather than applied as a surface coating. The exact cobalt percentage and steel grade must be taken from the selected product’s specifications. Suitable lubrication and cutting parameters remain essential for controlling heat and wear.

Tool Geometry:

DIN 340 specifies the dimensional series for long twist drills with straight shanks. GT100 identifies the designated tool execution. Its point geometry, helix angle, thinning and any surface treatment should be confirmed from the manufacturer’s technical specifications.

Practical Recommendations:

Secure the workpiece and clamp the straight shank with the minimum overhang required for access. Check spindle runout and follow the manufacturer’s guidance on starting-hole preparation. Maintain controlled axial feed, supply suitable cutting fluid and use an appropriate withdrawal cycle when needed to clear chips.

Specifications:

• Tool type: cobalt-alloyed twist drill for metal
• Series: long
• Standard: DIN 340
• Execution: GT100
• Shank type: straight
• Tool material: cobalt-alloyed high-speed steel (HSSCo)
• Diameter: depends on the selected size
• Overall length: depends on the selected size
• Flute length: depends on the selected size

Cutting Characteristics:

The HSSCo material provides increased hot hardness, while the extended tool length requires careful control of vibration and bending. Effective chip evacuation helps prevent flute blockage and excessive torque.

Cutting Parameters:

Select spindle speed and feed using the manufacturer’s GT100 cutting data for the workpiece material and drill diameter. Account for hole depth, coolant delivery and setup rigidity when choosing the drilling cycle.

Suitable Operations:

• Drilling metal components requiring additional reach
• Accessing recessed drilling locations
• Producing through holes and blind holes within the tool’s working capacity
• Preparing holes for subsequent machining where specified

Limitations:

Material compatibility and performance limits depend on the specific GT100 design and HSSCo grade. Avoid lateral loads, misalignment and chip packing. Flute length alone does not determine maximum drilling depth. Deep holes or tight tolerances may require additional guidance, specialised tooling or a finishing operation.