Emerson Bettis RTS FQ Series Operating Manual page 78

Section 15: Lubricant Recommendation / Lubricant Requirements
February 2019
Table 33.
Extremely high DT
Extremely low DT
Ambient temperature
Extremely changeable
Application example:
Extremely low DT + extremely low ambient temperature + high speed + 87% utilization
> 0.8 * 0.9 * 0.8 * 0.9 = 0.51 reduction factor
Lubrication maintenance interval ) 10 years * 0.51 = 5.1 years (62 months).
CAUTION
This calculated maintenance interval does neither apply to the maintenance of output
type A (threated bushing) units nor to the maintenance of linear and spindle drive units.
These units must be periodically lubricated (at least every 6 months) via the grease nipples
(see Section 15).
During maintenance of our actuators, remove and replace old grease with new one. Mixing
of different lubricant types is NOT permitted.
Quantities needed for lubricant service are listed in Section 15.
73
Lubrication Utilization (1)
Operating
Condition(s)
Duty Time (DT)
High DT
Extremely high
Extremely low
Output speed
High speed
Utilisation
Very high
High
Definition
(Total engine running time)
Over 1,250 hours/year
Over 500 hours/year
Less than 0.5 hours/year
(permanent or longterm)
Between -10 C and +50 C
o o
Over +50 C
o
Below -25 C
o
(on main shaft of actuator)
Over 80 rpm
(relative to rated power)
Over 90%
Between 80 to 90%
Lubricant Recommendation / Lubricant Requirements
User Instructions
MAN-02-04-60-0351-EN Rev. 3
Reduction Factor
(Multiplier)
0.5
0.7
0.8
0.5
0.7
0.9
0.8
0.8
0.9