Koto Mould provides full range of machining services for mold and die, machinery industries, including Wire EDM, Sinker EDM, CNC milling, CNC turning, flat surface grinding, OD/ID cylinder grinding, Centerless grinding, Laser marking.

Surface grinding machine

Surface grinding is used to produce a smooth finish on flat surfaces. It is a widely used abrasive machining process in which a spinning wheel covered in rough particles (grinding wheel) cuts chips of metallic or nonmetallic substance from a work piece, making a face of it flat or smooth.

We have both automatic and manual surface grinders to easily handle a large variety of materials and hardness. Precision up to 0.002mm and max size we can handle is 800*600*200mm.

Wire EDM cutting

Wire EDM is the most precise and common method for making die components. Wire EDM can cut nearly any conductive material. Tolerances of +/- .002mm can be held on our Sodick wire EDMs, which can accommodate parts of 330*240*230 mm Max.

Advantages and Benefits

  • Tight tolerance(+/- .002mm or better)through holes and cutouts
  • Square corners and shapes that can’t be machined
  • Tapered holes and slots
CNC Hard turning

CNC Turning

Our turning machines can feed material ranging from 1.0mm up to 320mm in diameter. We specialize in unique geometries such as face grooving, tapered turning, knurling, grooving, spherical radius, threading, drilling, precision turning, and boring with tolerances as close to +/- 0.005mm. Hard turning of max HRC68 is achievable.

OD ID cylinder grinding

ID/OD Cylindrical grinding

Our precision cylindrical grinding processes include angle, contour, deep-hole, flat, high-speed, radii, taper and wet grinding.

Sinker EDM

Sodick EDM

Sodick EDM is the method of choice for difficult to machine materials and features that cannot be machined any other way. Tolerances of +/- .005mm can be held on our Makino Sinker EDM, which can accommodate parts of 450*300*320 mm Max.

Advantages and Benefits

  • Unique Cavity Shapes
  • Sharp Internal Corners
  • Small Holes
  • Works for any conductive material and some non-conductive material, Difficult-to-machine material
Laser marking

Value added option: Laser Marking

Laser marking can produce a permanent mark and easily integrated into the production process. Applications Include:

  • Brand and logo
  • Date coding
  • Part Number
  • Work instructions
  • Bar code
CNC milling for plastic mold

CNC Milling

With a CNC machining center which works in high-speed upto 20,000 RPM, Taiyou precision is able to produce superior precision (±0.005mm), and can grind to even tighter tolerances. We can hard mill and hard turn materials in any heat treated condition, even when hardness is above Rc 60.

The max size we can operate is 1000*550*450mm. Tolerances of +/- .005mm can be held on our Gentiger CNC machining center. Our technician can operate two or more CNC machines simultaneously , allowing faster throughput and reduce human labor cost.

Centerless grinding

Centerless grinding

Unlike center-type or chucker-type grinding, Centerless grinding does not require center holes, drivers or workhead fixtures.  This allows high through-put since parts can be quickly inserted and removed from the process.
Max size we can hanle is 0.35~60mm in diameter and 600mm in length,  precision up to 0.001mm.

Equipment Qty Model No. Brand Tolerance
CNC Lather Machine 6 106# 108# YANN 0.005mm
EDM 7 AQ400 Mitsubishi, Dimon Shadik 0.005mm
High speed lather machine 2 6140# Guangzhou 0.02mm
Small Later 4 15#;25#:32# Jincheng 0.02mm
Surface Grinding Machines 6 618S Wangpan, zhengjia 0.002mm
Grinding machines
2 27/27NC-35/35NC Shengchang,Taiwan 0.002mm
Centerless grinder 2 120# Shengchang,Taiwan 0.002mm
Thread grinding machines 2 X180-R36 Taiwan 0.003mm
External Grinding Machines 3 M2120A Taiwan, shanghai 0.002mm
Internal Grinding Machine 3 ZJ-010 zhengjia 0.003mm
Milling Machine 4 RA-2S hengyu 0.02mm
CNC Machining Machine 4 a-D14MIB Fanuc,Japan 0.005-0.01mm
Polish Machines 2   Shanghai  
Grinding machine
1 300*500*250 Fuyu, Taiwan 0.003mm
CNC Cylindrical Grinding Machines 2 150*500 Huixin 0.003mm
Two dimension measuring instrument 2   Wanhao 0.005MM
Projector 2   Wanhao 0.005MM
Altimeter 2   TESA,Switzerland 0.002mm
Micrometer 5   Wanfeng 0.002
CMM 1 DISYC Edward 0.002mm

Advantages and Benefits

  • Excellent surface finish
  • Excellent straightness
  • Excellent roundness
  • Less stock compared to non-centerless grinding
  • Little work deflection (allows for grinding of long parts)
  • Ease of automation
  • Lower cycle times

Value added option: Coating

Available coatings:

Black Oxide
Balintit D

and more…


Materials we handle

Our Custom precision Components are manufactured from:
And other materials available


Product ranges

ADA Precision can offer you excellent work of Mold & Die Components:

Cavity inserts
Core inserts
Ejector Blades
Ejector Pins
Ejector Sleeves
Die details
EDM plates
EDM Electrodes

As well as precision component for automation, fixtures and other Precision Machinery Parts.



KOTO Mould is capable of Custom components with diameters ranging from 0.2 to 220  mm, lengths up to 1000mm, with tolerances down to +/-0.002mm, coaxiality 0.003 mm, circularity 0.002 mm, surface finishes as best as Ra0.25.

Especially good at difficult and complex parts with tight tolerance,  for industrial of automotive, medical, automation, fixtures etc.

Main products:

Why choose us?

Quality Guarante


Offer will be provied within 1 working day
WhatsApp: 86-15007699599
Mobile: 86-15007699599