Service Factor

The service factor(f.s.)depends on the operating conditions the gearbox is subjected to. Following parameters need to be taken to select the right service factor.
      --type of load of the operated machine A - B - C
      --length of daily operating time: hours/day(△)
      --start-up frequency: starts/hour (*)
TYPE OF LOAD:A-uniform,fa≤0.3
                            B-moderate shocks,fa≤3
                            C-heavy shocks,fa≤10
      --Jex(kgm2) moment of the external inertia reduced at the drive shaft
      --Jm(kgm2) moment of inertia of motor
speed reducers, gear reducers

   To install the reduction unit it is necessary to note the following recommendations

--The mounting on the machine must be stable to avoid any vibration.
--Check the correct direction of rotation of the reduction unit output shaft before fitting the unit to the machine.
--In the case of particularly lengthy periods of storage (4-6 months) if the oil seal is not immersed in the lubricant
  inside the unit,It is recommended to change it since the rubber could stick to the shaft or even has lost the elasticity
  it needs to function properly. speed reducers, gear reducers
--For a shaft mounting, for reduction units with a hollow output shafts, use the torque arms we can supply. If it is not
   possible,make sure that the constraint is axially free and with such play as to ensure free movement for the reduction
--Whenever possible, protect the reduction unit against solar radiation and bad weather.
--Ensure the motor cools correctly by assuring good passage of air from the fan side.
--In the case of ambient temperatures <-5°C and >+40°C contact technical advise service .
--The various parts ( pulleys, gear wheels, couplings, shafts, etc.) must be mounted on the solid or hollow shafts
   using  special holes or other systems that anyhow ensure correct operation without risking damage to the bearings
   or external parts of the unit
--Painting must definitely not go over rubber parts and the holes on the breather plugs, if there are any.
--Taking out the seal embolism of the oilhole.
--Check the height of the oil level.
--Supposing the gear unit have not coupled with the motor,please pay attention to the following items to make sure
   rightly  connection. Mounting to B5,B14
--Check whether the tolerance between the shaft and motor flange fit for the essential standard.
--Washing the dirt and the paint on the surfaces of the shaft,center bore and the flange.
--Mounting avoid the gear unit incur strength .
--Check the position and the difference of the motor keyslot.
--Lubricate the surfaces in contact to avoid seizure or oxidation. speed reducers, gear reducers
--Starting must take place gradually, without immediately applying the maximum load.
--When there are parts objects or materials under the motor drive that can be damaged by even limited spillage of oil,     special protection should be fitted.

JX Products:
Speed reducer, Reducer, Gear reducer, Reducers, Worm Gear Reducer, Gear Motor, Worm Gearbox, Gearbox, Speed reducers, Gear reducers, Reducer motors, Worm reducer, Worm gear reducers, Gear speed reducer, Gear speed reducers, Gear reducer motor, Worm-gear speed reducer, Gearmotors, Speed variators, ULD Speed variator


Introduction of
worm gear speed reducer
Service factor & Installation notice
Mesh data
  NMRV Performance
  NRV Performance

NMRV series
worm gear speed reducer
NMRV/NRV series
NMRV/NRV Mode l& marker
NMRV/NRV Pos.of output shaft &  torque arm
NMRV/NRV Chice of lubricant
NMRV Dimensions
NRV Dimensions & Low speed shafts
Cover & Torque arm
NMRV Inch series
PC-NMRV series
PC-NMRV Model & marker
PC-NMRV Combinations
PC-NMRV Dimensions
NMRV-NMRV series
NMRV-NMRV Model & marker
NMRV-NMRV Parameter table
NMRV-NMRV Dimensions
NRV-NMRV Dimensions
PAM series
Combination of basic model and worm-gear speed reducer

UDL Series planetary cone & disk step-less speed variator
UDL Model & marker
UDL Dimensions

JMRH Series Servo Worm Gear Units
JMRH Product Chart
JMRH Series Dimensions Charts
JMRH Performance
JMRH Structure Decomposition Diagram
JMRH Designation
JMRH Features
JMRH Applications
JMRH Clearance Adjustment
JMRH Mesh Data
JMRH Position

JWG/JWGH Series Helical
JWG/JWGH Product Chart
JWG/JWGH90 Performance
JWG/JWGH110 Performance
JWG/JWGH63 Performance
JWG/JWGH75 Performance
JWG/JWGH Structure Decomposition Diagram
JWG/JWGH Designation
JWG/JWGH Disposition And Combinations
JWG/JWGH Features
JWG/JWGH Series Dimensions Charts


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