Zinc- and Ash-Free HM Hydraulic Oils and CKC Lubricating Oils Zinc-free hydraulic oils have steadily gained popularity over the last few years. In many cases, the use of a zinc-free hydraulic oil is a must, especially in machine tools where hydraulic fluids can contaminate metalworking fluids. RENOLIN ZAF B hydraulic oils are zinc- and ash-free HM hydraulic oils complying with ISO 6743-4.
The most important features of RENOLIN ZAF B hydraulic oils are:
Good oxidation stability and good resistance to ageing
Powerful EP properties and very good wear protection
Excellent corrosion protection
Rapid air release and low foaming
Good demulsification characteristics
Good compatibility with sealing materials
Application:
RENOLIN ZAF B products are high-grade HM hydraulic oils according to ISO 6743-4 which can be used in all hydraulic systems but also as CKC lubricating oils according to ISO 6743-6 in gearboxes, bearings and circulating systems. RENOLIN ZAF B products are recommended for use in machine tools where contact between hydraulic oils and metalworking fluids can take place.
RENOLIN ZAF
32 B
46 B
68 B
Hydraulic oil type
acc. to ISO 6743-4
HM 32
HM 46
HM 68
acc. to DIN 51 502
HLP 32
HLP 46
HLP 68
Lubricating oil type
acc. to ISO 6743-6
CKC 32
CKC 46
CKC 68
acc. to DIN 51 502
CLP 32
CLP 46
CLP 68
Characteristics
Unit
Test method
Colour
1
1
1
ASTM D 1500
Kinematic viscosity
at 40 °C
mm²/s
31.5
45
65.4
ASTM D 445
at 100 °C
mm²/s
5.3
6.7
8.4
ASTM D 445
Viscosity index
98
101
98
ASTM D 2270
Density at 15 °C
kg/l
0.878
0.878
0.885
ASTM D 1298
Flash point, Cleveland open cup
°C
215
230
230
ASTM D 92
Pour point
°C
-30
-27
-21
ASTM D 97
Neutralization number
mg KOH/g
0.3
0.3
0.3
ASTM D 974
Saponification number
mg KOH/g
1.3
1.3
1.3
ASTM D 94
Water content
% mass
not traceable
not traceable
not traceable
ASTM D 95
Insolubles
% mass
not traceable
not traceable
not traceable
DIN 51 592
Demulsification
min
10
10
15
DIN 51 599
Air release at 50 °C
min
3
8
7
ASTM D 3427
Foaming,
seq. I
ml
30/0
50/0
50/0
ASTM D 892 seq. I-III
seq. II
ml
20/0
20/0
20/0
ASTM D 892 seq. I-III
seq. III
ml
20/0
20/0
20/0
ASTM D 892 seq. I-III
Copper corrosion
degree of corr.
1a-100A3
1a-100A3
1a-100A3
ASTM D 130
Rust prevention
pass A
pass A
pass A
ASTM D 665
Ageing behaviour, increase in neutralization number after 1000 h
