Long deep hole drilling processing service of great precision Metal processing by Gundrill

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Deep hole drilling
Metal processing by gundrill
- 1.0 mm diameter and 110 mm lengths
- 0.8 mm diameter and 90 mm lengths

Long deep hole drilling processing service of great precision Metal processing by Gundrill

Precision deep hole drilling is a drilling process using a gundrill.  As its name suggests, a gundrill was a type of drill for drilling the barrel of a gun.  Nowadays, such crafting techniques and the facility thereof for drilling deep straight holes are applied to various types of machinery parts.



Deep hole drilling is performed by rotating each of the tool and the circular cylindrical object relatively to one other to avoid slide and bend of the hole.  In the case of deep hole drilling (φ0.1 diameter and 1,000mm lengths), the difference between the size of entrance and exit of a hole is within 1 mm error.  However, the error difference depends on the outside diameter, the material and straightness thereof



We can perform deep hole drilling within a range of φ4~32 and in range of less than φ4 by using several types of machinery and equipments.

Actual Performance:

Case 1 – φ1.0 mm diameter and 110 mm lengths

Case 2 - φ0.8 mm diameter and 90 mm lengths


We are proud of performing deep hole drilling of not only for circular cylindrical objects but also for cubical objects.  We also perform multiple holes drilling on end faces with high positional accuracy using NC machines.  This multiple deep holes drilling on end faces is available within a square range from 500mm wide to 240mm long for almost any size of objects.



Hinges for aircraft

(Indispensable technology for straight deep hole drilling for tough-grinding material)

Drilling hole for cooling in large food-related machinery

(Difficult positioning for different material objects)


Our website

Japanese : http://www.kk-dainichi.co.jp/business/business3.html

English : http://www.kk-dainichi.co.jp/e/?page_id=33


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