The “Micron Holder” transforms general purpose machines into honing machines.

 This is an innovative holder that finely dices the chips, which can deteriorate the machining accuracy of the reaming process and damage the tool, and then expels the chips efficiently. The oscillation mechanism built into the holder dices the chips and promotes their expulsion, and also spreads the cutting oil throughout. A honing process that has micron-level tolerance, which was impossible to attain with conventional general purpose machines, is now possible with such machines, e.g., drilling machines.  This innovative product makes it possible to use general purpose machines, as high-precision honing machines by fitting them with a holder that has a built-in oscillation mechanism.  A honing process that has a micron-level tolerance, which is impossible to attain with conventional general purpose machines, is now attainable. It is suitable for a wide range of working materials that are difficult to polish, such as stainless steel, tempered steel, cast iron, cemented carbides, ceramics, and aluminum. Furthermore, the cutting oil can be either oil-based or water-based.  The amplitude is adjustable between 0 and 1.0 mm.

Operation of Micron Holder

 The tool cutting load can be reduced with the oscillation mechanism, thereby extending tool life. The amplitude of the oscillation can be set between 0 to 1 mm. Furthermore, the rocking of the reamer can be adjusted to within 2 μm. For this reason, the use of a floating holder is not required.

 

Principal specifications of Micron Holder

Name
Type
Honing diameter
(mm)
Amplitude
(mm)
Holder section
Tool mounting
Weight
(kg)
Micron Holder MC Machine φ2.0 ~ φ40 0 ~ 1.0 BT-40

Shank diameter
(φ5 ~ φ25)
Collet chuck type

6
Drilling Machine φ2.0 ~ φ25 MT-3 4.5
MT-4
MT-5
After machining (S45C)
 
Surface roughness (RzD)
(μm)
Cylindricity
(μm)
Ordinary machining 1.53 1.875
Using a Micron Holder 1.2 1.45

* Machining performed with an average machining allowance for diamond #200.
* Expansion reamer with a diameter of 10 mm and diamond #120 was used.
* Single-pass processing performed.
* Figures may vary depending on the machining conditions.

After machining (FC)
 
Surface roughness (RzD)
(μm)
Cylindricity
(μm)
Ordinary machining 1.17 1.5
Using a Micron Holder 0.93 1.26

* Machining performed with an average machining allowance for diamond #50.
* Expansion reamer with a diameter of 10 mm and diamond #50 was used.
* Single-pass processing performed.
* Figures may vary depending on the machining conditions.

Comparison of tool life between an ordinary holder and a Micron Holder

 
Ordinary holder
Micron Holder
Material Possible number of processes Possible number of processes
SUS 30,000 90,000
SS
S45C
20,000 50,000
Copper,Brass 50,000 125,000
Cast iron 50,000 60,000

* Figures may vary depending on the machining conditions.