hu hu
MOTION AND DRIVE  -  Tel: 0036-1-445-0435  -  e-mail: info@reductor-motor.com  -  skype: reductors     
 
SALE
 LO
LO
 
Products
 L
- GEARBOXES
- ELECTRIC MOTORS
- D.C. MOTOR (12V, 24V)
- BLDC MOTORS
- STEPPING MOTORS
- SERVO DRIVES
- VIBROMOTORS
- INVERTERS
- FANS
 
Contact
 L

ALWAYS AT YOUR SERVICE
1145 Budapest Róna u. 127/A.
Tel: 0036-1-445-0435
email: info@reductor-motor.com
KI
Skype Me™!
Chat with me

 
Downloads
 L

- AC motors catalogue
- DC motors catalogue
- Mechanical variators catalogue
- Planetary gear units catalogue
- Bevel helical gearboxes
 
Theory
 L

service factor, electric motors, DC motors, stepper motors, servo motors, vibromotors, frequency inverters, cooling fans, worm gearboxes, helical gearboxes, planetary gearboxes
 
Producers
 L

Varvel, Nord, Siti, Watt Drive, Bonfiglioli, Motovario, Spaggiari, Chiaravalli, CHT, Leeson, VEM, Baldor, Lenze, Hydro-mec, Lafert, ICME Motors, WEG, Teco, MGM, SEW, Transtecno, ATB, Bartec, A:O:Smith, Heidolph, Elin Ebg, Siemens, Leroy Somer, Bison, Marelli Motori, Orientalmotor, SPG, Faulhaber, Kelvin, Unimec, Crouzet, THK, Magnetic, Cemp, Carpanelli, Bühler, Piemme
 
More Products
 L

- One step helical gear box
Home / Theory / Service factor
  - SERVICE FAKTOR

This value indicates how a certain drive system is to be over-sized in order to assure the requested service and stand up to shocks.

The tables given in the catalogue offer a wide range of drive system with different service factors able to satisfy most types of applications. To correctly understand service factor values sf given for each item, approximate values for load classes A, B and C along with the number of hours of daily operation h/d and number of start-ups/hours need to be known.

Once the load class required for the application has been determined, locate corresponding value sf to be used when selecting the most suitable drive system.

Type of load
A- Uniform
fa < 0,3
 fa = Je/Jm
-Je (kgm2)moment of reduced external intertia at the drive shaft
-Jm (kgm2) moment of intertia of motor
If fa > 10 call our Technical Service
B-Moderate shocks
fa<3
C-Heavy shocks
fa<10

A Uniform load

sf
h/d
n. start-up/ hour
2
4
8
16
32
63
125
250
500
4
0.8
0.8
0.9
0.9
1.0
1.1
1.1
1.2
1.2
8
1.0
1.0
1.1
1.1
1.3
1.3
1.3
1.3
1.3
16
1.3
1.3
1.3
1.3
1.5
1.5
1.5
1.5
1.5
24
1.5
1.5
1.5
1.5
1.8
1.8
1.8
1.8
1.8

B Moderate shock load

sf
h/d
n. start-up/ hour
2
4
8
16
32
63
125
250
500
4
1.0
1.0
1.0
1.0
1.3
1.3
1.3
1.3
1.3
8
1.3
1.3
1.3
1.3
1.5
1.5
1.5
1.5
1.5
16
1.5
1.5
1.5
1.5
1.8
1.8
1.8
1.8
1.8
24
1.8
1.8
1.8
1.8
2.2
2.2
2.2
2.2
2.2

C Heavy shock load

sf
h/d
n. start-up/ hour
2
4
8
16
32
63
125
250
500
4
1.3
1.3
1.3
1.3
1.5
1.5
1.5
1.5
1.5
8
1.5
1.5
1.5
1.5
1.8
1.8
1.8
1.8
1.8
16
1.8
1.8
1.8
1.8
2.2
2.2
2.2
2.2
2.2
24
2.2
2.2
2.2
2.2
2.5
2.5
2.5
2.5
2.5

Application example:

Conveyor belt assigned to load class B (moderate shock load), to be run 16 hours a day (h/d) with 8 start-ups/hour.

The following value is obtained from the table: sf = 1.5

Impressum   r   h