Advanced technology of 2mm diameter, internal coolant deep drill with a 120mm flute length

2025-09-10

Parameter Breakdown

Diameter: 2mm → considered an ultra-small diameter drill.
Type: Internal coolant drill → coolant channels inside the drill deliver cutting fluid directly to the tip.
Flute Length: 120mm → effective cutting length, and the depth that can be drilled.
Length-to-Diameter Ratio (L/D): 120 ÷ 2 = 60D
→ This is an ultra-deep drill, with a depth-to-diameter ratio of 60:1, which is very challenging to machine.

Features

Internal coolant design: Reduces heat at the cutting zone, improves chip evacuation, and prevents breakage.
Small diameter: Suitable for precision micro-hole machining.
Extra-long flute: Requires a high-rigidity machine and stable clamping for deep-hole operations.
Tool material: Usually tungsten carbide (hard alloy), often coated with TiAlN or AlTiN for improved wear resistance and tool life.

Typical Applications

Aerospace: fuel nozzles, cooling holes
Medical devices: micro-holes in surgical instruments
Mold making: pinholes, guide holes
Precision components: hydraulic valve bodies, injection holes, spray nozzles

Summary:
A 2mm diameter, 120mm flute internal coolant drill is an ultra-deep micro drill with a 60D depth-to-diameter ratio, suitable for high-precision deep-hole machining. It requires high machine accuracy, proper coolant delivery, and careful operation.

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Advanced technology of 2mm diameter, internal coolant deep drill with a 120mm flute length

Advanced technology of 2mm diameter, internal coolant deep drill with a 120mm flute length