Tech Cool® 35630 RP
HIGH PERFORMANCE SYNTHETIC METALWORKING FLUID,
OUTSTANDING SYSTEM LIFE, SUPERIOR CLEANLINESS,
EXCELLENT LUBRICITY, LOW RESIDUAL FILM
1
Description
Tech Cool® 35630 RP is an oil-rejecting synthetic designed for moderate machining of
aluminium and steel alloys. One of the unique advantages of this product is the detergency
and lack of residue formed on parts even at elevated concentrations.
Tech Cool® 35630 RP was developed with environmental concerns in mind and to maintain
fluid integrity for the longest possible sump life. It is free of boron and formaldehyde donors.
Tech Cool® 35630 RP is recommended for machining and grinding of ferrous and aluminium
alloys. It is also suitable for honing of cast iron.
2
Physical and Chemical Properties
Property
Typical Value
Test Method
Form
Liquid
-
Colour
Clear yellowish
-
Density at 20°C
1.06 g/cm³
DIN 51757
pH-value (5% in water)
8.4
DIN 51369
Chipping test at 5 %
Grade 0
DIN 51360/2
3
Application
Tech Cool® 35630 RP can be mixed directly with water and is suitable for tapping, reaming,
sawing, turning, ID and OD grinding or similar operations. Depending on the operation, Tech
Cool® 35630 RP can be diluted from 40:1 to 10:1.
Water Conditions
German Hardness °dH
Suitability
Soft
<7
++
Medium
< 14
+
Hard
< 21
-
Very Hard
< 40
-
Technical Data Sheet Tech Cool® 35630 RP
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Metals
Concentration
Steel
3–8%
++
Alloyed steel and stainless steel
6 – 10 %
+
Cast iron
3–6%
+
Aluminium / aluminium alloys
3–8%
+
Non-ferrous metal
3–8%
o
Hard metal (containing cobalt)
6 – 10 %
-
Workability
Chip Removal
Suitability
Ordinary metal cutting
Sawing, turning, milling
++
Medium metal cutting
Drilling, casting
Deep drilling, threading,
broaching
++
Heavy metal cutting
Grinding
4
+
++
Welding fluid
For Inner coolant supply with high
pressure
++: main use
Suitability
++: very suitable
Forming
++
+
+: suitable
o: limited suitable
-: not suitable
Start up
Concentration depends on the type of substrate. Slowly and thoroughly mix Tech Cool®
35630 RP in tap water by stirring or using a mixer. Add the solution to the thoroughly precleaned machine avoiding intermediate storage of the mixed solution. For detailed
information on a system cleaner, please contact your local Chemetall representative.
For the filling operation, we recommend a Dosatron-metering station. A Dosatron-pump
doesn’t guarantee an equal emulsion concentration, however, after a certain runtime, the
average value will be stable. The advantage of this pump is that it works independent of line
pressure. Even at variable water pressure the correct quantity of concentrate is automatically
added to the water.
5
Process Control
During processing we recommend regular refilling of the emulsion because the level of the
recirculated solution is constantly being reduced due to evaporation and carryover. The
refilling should be carried out frequently. Operating the machining center at the low limit
should be avoided as it could lead to an increase in the salinity of the solution.
.
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Process Monitoring
We recommend a process control based on the following parameters which should be
regularly monitored depending on the workload – at least weekly. In case of deviation
corrective measures should be taken:
Parameter
Interval
Set point
Perceptible deviations
Daily
-
pH-value
Regularly
8.4 +/- 0.2
Concentration
Regularly
3 - 10 %
Nitrite-value
Regularly
< 20 mg/l
Total hardness
If required
5 – 40°dH
Contamination
If required
< 10³ KBE/ml
Adjustment
Odour: check contamination;
Oil: skim and avoid oil entry
Action: Determine reason for pH-value
decrease and take corrective action
Refill the plant with very weak or very
high concentrated solution
Exceeding up to 80 mg/l no measures
necessary - product inhibits against
nitrosamine formation
Increase hardness or rather refill with
demineralised water
Action: Addition of suitable biocide,
remove contamination from plant,
aerate
The measurement of concentration is carried out via a handheld refractometer as follows:
Apply some drops of the used solution to the refractometer and measure the value (% Brix).
Multiply this value with the product-specific factor (Rf).
The refractometer factor for Tech Cool® 35630 RP is Rf = 1.9
Tech Cool® 35630 RP (weight %) = measured value (% Brix) x 1.9
The factor for titration of Tech Cool® 35630 RP is 1,1 ml 0,1 n HCl/% (till pH 6,0)
Tech Cool® 35630 RP (weight %) = amount hydrochloric acid (ml) x 1,1
7
Process Maintenance
Depending on the processed materials, machining operations, available filter technologies
and basic conditions, the following maintenance measures may be required in order to
achieve long emulsion lifetimes. This includes among others the use of:
•
•
•
•
Defoamers (recommendation by technical service) to hinder the production of foam and
to keep the machinery operational
Hardeners (recommendation by technical service) to adjust the total hardness
Biocides to counteract possible contamination
Oil skimmers and oil fleece to remove drag-in-oil
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Safety Guidance
Before operating the process described it is important that this complete document, together
with any relevant Safety Data sheets, are read and understood. For transport, storage, use
and waste treatment of chemicals in concentrated or diluted form as well as bath solutions,
the appropriate local legislation must be followed. Further specific information on the products
can to be obtained from the relevant Safety Data Sheets. The user should also pay strict
attention to information and hazard symbols shown on product labels.
The above details have been compiled to the best of our knowledge on the basis of tests and research work and with regard to the current state of our
practical experience. This technical product information is non-binding. No liabilities or guarantees deriving from or in connection with this leaflet can
be imputed to us. Statements relating to possible uses of the product do not constitute a guarantee that such uses are appropriate in a particular
user's case or that such uses do not infringe the patents or proprietary rights of any third party. The reproduction of any or all of the information
contained in this leaflet is expressly forbidden without Chemetall’s prior written consent.
Headquarters and Regional Head Office
Europe, Middle East, Africa, South America
Chemetall GmbH
Trakehner Straße 3
60487 Frankfurt am Main, Germany
Tel: +49 (0) 69 7165-0
Regional Head Office
North America
Chemetall US, Inc.
675 Central Avenue
New Providence, NJ 07974, USA
Tel: +1-908-464-6900
Regional Head Office
Asia-Pacific
Chemetall Asia Pte Ltd.
12 Loyang Crescent
Singapur 508980
Tel: +65 6885 7900
www.chemetall.com | surfacetreatment@basf.com
Technical Data Sheet Tech Cool® 35630 RP
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© 2020 Chemetall GmbH, Frankfurt am Main, Germany
Version 6, December 2020