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HANGZHOU CHINABASE MACHINERY CO., LTD.

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.

lnput Shaft Speed

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

Output Shsft 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:

Table1:Load Factor f

Prime Mover	Duration Of Service Per Day	Load Factor f
Prime Mover	Duration Of Service Per Day	Uniform Load	Moderate Shock	Heavy Shock
Electric Motor	Occasional 1/2h	0.80	0.90	1.00
	Intermittent 2h	0.90	1.00	1.25
	8-10h	1.00	1.25	1.50
	24h	1.25	1.50	1.75

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

Table1 2:Overhung Load (O.H.L.)Coefficient f₁

Transmission Method	Sprocket	Gear	V-belt	Flat Belt
O.H.L.Coefficient f₁	1.00	1.25	1.50	2.50

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=6250inin.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.