About SMR Reducer,Ever Power Shalt Mount Reducer are metric in design throughout and have power ratings to AGMA standard. Shaft Mount Reducers
provide a very convenient method reducing speed, since it is mounted directly on the driven shalt instead 01 requiring loundations
its own. It eliminates the use of one, and sometimes two, flexible couplings and external belt take-up arrangements, A torque-arm
anchors the reducer and provides quick, easy adjustment the Wedge Belts by means of its turnbuckle
About SMR Reducer,Ever Power Shaft Mount Reducers are manufactured in eight gear case sizes, nominal gear ratios are 5:1,13: 1 and 20:1, A very wide
choice of final driven speeds can be determined by the use of an appropriate input Wedge Belt Drive
The units will normally be oillubricated, but they are equ创Iy suitable for long lile synthetic lubricants
Serice Factor
About SMR Reducer,Select the service factor application to the drive.
Service Factor
SMR Reducer Design power and output speed
About SMR Reducer,Determine the output speed of the gear units , multiply the absorbed power (or Motor power if absorbed power nit known) by the
service factor chosen in step 1
Note: Gear units are momentarily capable of transmitting twice (2X) the rated capacity on start or during operation
SMR Reducer Unit selection
According to the output speed and design power value lorm step 2 refer to the power rating tables (POWER RATING)and select the correct size unit The choice of single or double red uction gearbox will be determined by the output speed required , The normal operating speeds for each 01 the gearboxes may be observed in the power rating (POWER RATING) and belt drive tables (Belt Drive tables), For other speeds please consult YINGTAI. Note: When use 5:1 Gear Units, the Back stop do not recommended .
SMR Reducer Belt drive selection
selection of associated belt drive for 1440 rpm electric motors
1.SMR Reducer 0utput Speed
Refer to the Drive Selection Tables (page 12 to 15) and under the appropr-Iate gearbox size and ratio read down the column headed
'Output Speed' until an Output Speed equal or near to that required is found. The suggested gearbox ratio is given in the first column
2.SMR Reducer Pulley Diameters
Read across from the chosen output speed to obtain both driving and drives pulley pitch diameters , groove section and the
appropriate number of belts
Note: in many instances one belt is recommended , being adequate for power transmission purposes ; where customer preference is
for muti-belt drives consult YINGTAI.
3.SMR Reducer Center Distance
Belt length and center distance can be found by referring to the appropriate pages 01 the "Wedge Belt Drives" catalogue.
Note: Wedge belt drives shown on pages 12 to 15 have given the most economical total drive package for the speed required . If it is
necessary to design a special drive , please consult YINGTAI. Torque arm should preferably be in tension when unit is in operation
Sel ect ion of associated belt for driving speeds other than 1440 rpm
1 、SMR Reducer Gearbox input Shaft Speed
Multiply the gearbox output speed by the EXACT GEAR RATIO ( found in the table SMR-Reducer-Dimensions) to obtain the gearbox input shaft
speed.
2 、SMR Reducer Selection of ‘V' Orive
The correct belt drive can now be selected referring to th e 'wedgrBely Drives' catalogue
SMR Reducer Example
SMR Reducer A shaft Mounted Speed Reducer is required for a uniformly loaded elevator which absorbs 3.6kW at 50 rpm. The prime mover is a
4kW 1440 rpm direct on line start electric motor. A belt drive is required between the motor and gearbox at approximately 700mm
centers running for up to 24 hours/Day
Gear Unit Selection
1 、Service factor
From table 1 the service factor is 1.25.
2 、Design Power
Using the elevator absorbed power of 3.6kW. Design power=1 .25x3.6= 4.5kw
3 、Unit selection
Using 4.5kw as the basis for selection reference to the power rating tables (page 7)indicates that E13 or E20 gear unit will
transmit 5.81 kw at 50 rpm
Selection of associated belt drive
1, SMR Reducer Output speed
A more economic belt drive will be obtained if the 20: 1 ratio gearbox is selected, any by reference to page 13 in the gearbox drive
tables 50 rpm is obtainable.
2 、SMR Reducer Pulley diameters
On the line giving the output speed of 50 rpm , read across and note the driving and driven pulley pitch diameters together with
the numbers of belts requ ired , which for this case is 100 mm and 140 mm, using 2 SPA wedge belts .
3 、Belt selection
By reference to the 'wedge belt drives' can be seen that SPA 1800 belts give 711 mm centers.
