8
Lubricants
Guidelines for selecting oil and grease
Assembly and Operating Instructions – M1..N Series Single-Stage Helical Gear Units
88
8
Lubricants
8.1
Guidelines for selecting oil and grease
8.1.1
Lubricating oils
These instructions apply to the following conditions:
•
Ambient temperature range of -30 °C – +40 °C
•
Actual maximum pitch line speed below 35 m/s
•
Lubrication: Pressure, bath or splash lubrication
In addition to viscosity class ISO VG, the oil must also contain an anti-wear additive,
corrosion protection additive, antioxidant additive, and anti-foam additive. The FZG
stage should be at least 12 according to DIN 51354.
The oil also needs to contain extreme-pressure additives (EP additives). When you
chose to use synthetic oils due to the operating temperatures or oil change intervals,
SEWEURODRIVE recommends using oils based on polyalfaolefin (PAO).
Mineral oil
Standard
Lubrication oils are divided into ISO VG viscosity classes according to ISO 3448 and
DIN 51519.
ISO
class
ISO 6743-6
designation
DIN 51517-3
designation
AGMA 9005-D94
designation
150
ISO-L-CKC 150
DIN 51517-CLP 150
AGMA 4 EP
220
ISO-L-CKC 220
DIN 51517-CLP 220
AGMA 5 EP
320
ISO-L-CKC 320
DIN 51517-CLP 320
AGMA 6 EP
460
ISO-L-CKC 460
DIN 51517-CLP 460
AGMA 7 EP
680
ISO-L-CKC 680
DIN 51517-CLP 680
AGMA 8 EP
Selecting the viscosity
The maximum operating temperature of mineral oil is 80 °C.
Selecting the lubricating oils
If the gear unit is operated outdoors under the following conditions, an oil heater must
be used:
•
When the start-up temperature is below the pour point of the oil, in case of pres-
sure or bath lubrication
•
When the initial viscosity of the oil is larger than 2000 cSt, in case of pressure lu-
brication.
29203856/EN – 03/2020
