Specification For Worm Gear Reducer Select Type

Specification For Select Type

The correct selection is necessary to use EVER-POWER worm speed reducer efficiently.Therefore please refer to the following specification before ordering.

Input Shaft Speed

The general input shaft speed is 600-1500 r/min,the maximum is 1800 r/min.Too low input shaft speed could affect efficiency and lubrification.

Output Shaft Speed

Depends upon the input shaft speed and reduction ratio.

Output Torque T

The transmission torque of reducer depends upon the force that causes the output shaft rotate and the rotary radius.See Fig.1:

Load Factor f

The rating input power and output torque of reducer is established on the basis of an ideal condition that the reducer are operating continuously 8 hours per day under a constant load.If the load or operating condition changes. the output torque changes also.So select suitable type must according to the flowing table 1.

Overhung Load Coefficient f₁

It is due to the O.H.L.that the shaft of the speed reducer bent or its casing cracked.According to table 2,the selected reducer type must meet the following formula:

Table 1: Load Factor f

Note:For frequent starts and stops multiply the above table by 1.25.

Table 1 2: Overhung Load (O.H.L.)Coefficient f₁

Example

One conveying machine needs to select a worm speed reducer(input shaft is lower).Its input shaft speed is 1450r/min.Its output shaft speed is 29r/min.Chain pulley transmission,the tensile force is 1000 Ibs on full load. The diameter of sprocket's reference circle is 10in.Operating 10 hours continuously per day.Moderate shook.

Selecting As Follows:

Ratio i=1450?9=50
Rafer to table 1,f=1.25
Load torque T=W×R×f=1000?0/2?.25=6250 inin. Ibs
Rafer to table 2,f₁=1
O.H.L.=W×f₁=1000?=1000 Ibs
Refer to page 11,select Type 135(50:1),Its max. allowed torque is 6820in.Ibs,Its max.allowed O.H.L.is 1520 Ibs. Thus, AY135-50:1 is selected. Otherwise refer to page 9,select Type 516(50:1), Its max. allowed torque is 7110 in. Ibs and its max. allowed O.H.L. is 2700 Ibs, Yoy can select UAY516-50:1 ALSO.