Manufacturers of High Quality Planetary & Special Gear Boxes
Dealers of Std. AC Induction Motors & All Other Types of Gear Boxes

Technical Information
Radial (Overhung) Load Rating
 
F
 = ( 14052200 x P x Fc ) / ( D x N )
where
F
 = Actual Radial Load in N
P
 = Power being Transmitted in HP
Fc
 = Load Connection Factor (See Table 2)
D
 = PCD for Pully or Sprocket in mm
N
 = Speed of shaft in RPM


Table 2
Load connection Factor Fc
  Type of Connection
Fc
  Sprocket or Timing Belt
1.00
  Pinion or Gear
1.25
  V Belt
1.50
  Flat Belt
2.50
 
This Calculated Overhang Load should be less than the Allowable overhang Load Fa.
The allowable overhang load is directly related to the expected life in Working Hours. The recommended expected life values are given in Table 3.
Table 3 - Recommended Life Values
Type of Operation Examples
Life in Working Hours
Infrequent Demo Units, Prototypes etc.
500
Brief Operation Hand Tools, Lifting Tackle, Domestic & Agricultural Machines etc
4000 - 8000
Intermittent Operation  
8000 - 12000
One Shift operation  
12000 - 30000
Continuous Operation  
30000 - 60000
Continuous with High Production Power Plant Machinary, Mine Pumps, equipments with very high downtime cost.
60000 - 100000
Based on this expected life and the speed of the shaft, find Life Factor K from Table 4 given below.
The Allowable Overhang Load Fr is calculated by following formula :
F
 = Fo x Lf x K
where
Fr
 = Actual Radial Load in N.
Fo
 = Radial Load capacity for the related model as per Table 5.
K
 = Life Factor as per Table 3.
Lf
 = Load Location factor (See Table 7). Depending on the Model & Position of the actual load, Dist. 'x' (at which you desire to calculate the radial load), see Fig.2, Select 'Lf'.