KSB CTN - Page 42

7 Servicing/Maintenance
42 of 76
CTN / CTN-H
7.2.3.1.1 Grease quality
Table20: Grease quality to DIN 51825
Soap basis NLGI grade Worked penetration
at 25°C in mm/10
Drop point Temperature range
Lithium 2 to 3 220-295 ≥ 175°C -30°C to 120°C
7.2.3.1.2 Grease quantities and intervals
Table21: Grease change
Size Bearing size Grease refill after hours/required quantity in cm³
at a speed of rpm
1450 1750 2900 3500
25/40/50 2 x 7206BUA 8000/100 7500/100 4000/70 3000/70
80/100 2 x 7309BUA 6000/140 4500/140 2000/110 -
125/150 2 x 7309BUA 6000/140 4500/140 2000/110 -
200/250 2 x 7313BUA 3500
8)
/300 2500/300 - -
7.2.3.2 Oil lubrication
The thrust bearings (rolling element bearings) can be also be lubricated with oil.
7.2.3.2.1 Intervals
Table22: Oil change intervals
Temperature at the
bearing
First oil change All subsequent oil
changes
9)
≤ 50 °C After 300 operating hours Every 3000 operating hours
> 50 °C After 300 operating hours Every 2100 operating hours
7.2.3.2.2 Oil quality
Oil quality Table23: Oil quality
Designation Symbol to
DIN51502
Characteristics
CLP46 lubricating oil
to DIN51517
or
HD20W/20 SAE
□ Kinematic viscosity at
40°C
46±4 mm²/s
Flash point (to
Cleveland)
+175 °C
Solidification point
(pour point)
-15 °C
Application
temperature
10)
Higher than
permissible bearing
temperature
7.2.3.2.3 Oil quantity
Table24: Oil quantity
Size Bearing size Oil quantity
11)
[l]
25/40/50 1 x 6312 DIN 625 0.5
80/100 2 x 7312 BUA DIN 628 0.9
8) 5200 hours if n = 960 rpm
9) At least once a year
10) For ambient temperatures below -10 °C use a different suitable type of lubricating oil. Contact KSB.