Cutting oil lifetime test

Cutting oil lifetime test

 

[Verification]

Type of a coolant
Manufacturer Nippon Quaker Chemical, Ltd
Product name Microcut KD
 
Verification starting time After the cutting oil change on June 13, 2008
The test of this unit was started on December 11.
Degree of odor Odor Sensor XP-329IIIR by New Cosmos Electric Co., Ltd.
Test for bacterium Bio Checker by SAN-AI OIL CO., LTD.

[Cultivation]

  • Set the heater inside box open at open at one face and measure with a digital thermometer.
  • The temperature inside was kept around 30 degrees Celsius.
  • Observe the status with keeping the condition for 48 hours.

[Experiment]

  • Cultivation was started with the Bio Checker submerged in test liquid on December 8.
  • The cultivation status was checked on December 10: The cultivation was decided to be continued, since the cultivation was not enough although the surface was slightly changed.
  • Bacteria reproduced to 106 on the comparison table (Bio Checker decision table) by December 11.

[Experiment after setting this unit]

  • Set and started to operate this unit on December 11 (24 hours).
  • Test by Bio Checker on December 12 (1) (4) Measurement with Odor Sensor
  • Test by Bio Checker on December 13 (2)
  • Test by Bio Checker on December 14 (3) (5) Measurement with Odor Sensor

[Experiment results]

  1. Bacteria have decreased to 105. Anaerobic bacteria are considered to have reduced.
  2. Bacteria have decreased to 104. Anaerobic bacteria are considered to have reduced.
  3. The status 104 is still the same.
  4. Odor Sensor shows almost the same value of the air outside.
  5. Odor Sensor shows almost the same value of the air outside.
* Measurements with Bio Checker was under the same condition of the first measurement.

[Conclusion]

  • The result for Odor Sensor was not enough: It may be due to the way of air aspiration.
  • It can be felt that the odor reduced with smelling directly on the 3rd day.

 

Bacteria count Concentration
  1. The bacteria count decrease can be seen.
  2. The concentration of cutting oil has been thickened (The concentration raised (about 20%) due to the pumped air and low humidity in the factory).
  3. The bacteria count is presumed to decrease, since the diluted cutting oil was added in order to recover the appropriate concentration of 10% after the measurement.