Precision Machining in Japan
PMT CORPORATION which is investment company of PRETEC WORLD has done contracted machining of precision parts for production machines in semiconductor and electric component industries since establishment in 1991.
High machining technology that has been cultivated through meeting to various requirement by customers and own alliance network allows precision machining various materials; tool steel, cemented carbide, ceramics, etc.
More than 20 unit of machining facilities such as Vertical/ Horizontal Machining Center and Surface Grinder in our own plant.
Furthermore, inspection by our QC department with several inspecting/ measuring facilities including Ultra Precision CNC Coordinate Measuring Machine (CMM) enables to ship 99.85% of good products annually (calculated from achievement in past 5 years).
Index
Ceramic Processing
Various ceramic materials such as silicon carbide (SiC), silicon nitride (Si3N4) in addition to alumina or zirconia can be processed in precision.
We not only process materials provided by customers, but also undertake material procurement.
In addition, we undertake request of consult regarding of replacing material from metal to ceramics.
Product life improvement and cost reduction will be expected by physical properties of ceramics such as corrosion, heat and chemical resistance.
Correspondence Table
We offer the ideal processing method depending on customer's request; materials, required accuracy, budget, etc.
Typical examples are shown in following table. For the other materials or methods, please feel free to ask.
| Micro Machining | Grinding | Wire-saw Cutting | |
| Alumina | ★ | ★ | ★ |
| Zirconia | ★ | ★ | ★ |
| Silicon Carbide | ○ | ○ | |
| Silicon Nitride | ○ | ○ | |
| Machinable Ceramics | ★ | ★ | ○ |
★ - Specialty ○ - Possible No Mark - Impossible
Example of Ceramics Processing
Thin zirconia enough to be knitted
Although this work can be seen as a coaster at first glance, this is knitted white and black zirconia that grinded to thinness of t=15um.
This is not practical items, but is a proof of high grinding technology that making zirconia thin enough to be knitted which has high hardness.
Metal Processing
In addition to aluminum or stainless, various metal materials can be processed; cemented carbide and tool steel as hard-to-process material with high hardness and 42 alloy or invar as low-expansion alloy.
Integrated production from material procurement to surface treatment is available as per customers request.
Processing small parts up to 200mm sq is our specialty, but middle parts are also possible.
Furthermore, processing brittle materials such as silicon or glass can be undertaken.
Correspondence Table
We offer the ideal processing method depending on customer's request; materials, required accuracy, budget, etc.
Typical examples are shown in following table. For the other materials or methods, please feel free to ask.
| Machining | Grinding | WEDM | Wire-saw Cutting | |
| Stainless | ★ | ★ | ★ | ★ |
| Aluminum | ★ | ★ | ★ | ★ |
| Nickel Alloy | ★ | ○ | ○ | |
| Silicon | ★ | ★ | ||
| Glass | ○ | ★ | ||
| Cemented Carbide | ★ | ★ | ○ | ○ |
★ - Specialty ○ - Possible No Mark - Impossible
Example of Metal Processing
Geometric pattern on hard-to-process material
High machining technology allows processing geometric pattern on 42 alloy which is known as hard-to-process material.
We also can take small lot orders (MOQ: 1pc).
Please feel free to ask.
Own Facilities
Machining Facilities
Vertical Machining Center
Manufacturer : OKK
Model : VM53R/VM76R
Micro Machining Center
Manufacturer : Roku-Roku Sangyo
Model : MEGA-Ⅲ400
Surface Grinder
Manufacturer : NAGASHIMA SEIKO
Model : NP840-F
| Facility Name | Manufacturer | Number of Own |
|---|---|---|
| Lapping Machine | ― | 1 |
| Surface Grinder | JUNG | 1 |
| Okamoto Machine Tool Works | 3 | |
| Grinding Center | CHI-FA MACHINERY | 3 |
| Horizontal Machining Center | Makino Milling Machine | 1 |
| Vertical Machining Center | Makino Milling Machine | 1 |
| OKK | 9 | |
| DMG MORI | 1 | |
| ROBODRILL | FANUC | 5 |
| WEDM | Pikat | 1 |
| Ultrasonic Cleaning Machine | Crystal Optics | 1 |
| Laser Marker | KEYENCE | 1 |
| Laser Marker (For Ceramics) | Panasonic | 1 |
Measuring or Inspection Facilities
CNC CMM
Manufacturer : Mitsutoyo
Model : CRYSTA-Apex9106
E0,MPE= (2.20＋L/1000) um
Ultra High Precision CMM
Manufacturer : Mitsutoyo
Model : LEGEX776
E0,MPE= (0.28＋L/1000) um
Image Measuring Device
Manufacturer : Mitsutoyo
Model : QVX302-PRO_BL2G
| Facility Name | Manufacturer | Model |
|---|---|---|
| Ultra High Precision CNC CMM | Mitsutoyo | LEGEX776 |
| CNC CMM | Mitsutoyo | CRYSTA-Apex9106 |
| Nano Search Microscope | OLYMPUS | LEXT OLS4500 |
| Image Measuring Device | Mitsutoyo | QVX302-PRO_BL2G |
| Non-contact Surface Measuring Device | Wyko | TOPO-2D/3D |
| Scanning Electron Microscope (SEM) | JEOL | JSM-6460 |
| Laser Measuring System | RENISHAW | ML 10 Gold Standard |
| Toolmaker's Microscope | Nikon | MM-60 |
| Hight Gage | TRIMOS | VERTICAL 3 |
| Surface Roughness Tester | TOKYO SEIMITSU | Surfcom 1400A |
| Autocollimator | Nikon | 6D |
| Measuring Microscope | Mitsutoyo | MF-B3017B |