Load Formulas for Rotary Bearings  
This section contains the bearing data that is needed for calculating the load and life of rotary bearings, including 2. Cylindrical Roller Bearings 5. 40º Angular Contact Ball Bearings 6. SelfAligning Ball Bearings  
Deep Groove Ball Bearings  
1. Equivalent Static Load:
2. Equivalent Dynamic Load: F_{dyn} = X_{drad} · F_{srad} + X_{dax} · F_{sax}
where X and Y are dependent upon the ratio Co/F_{sax}, as listed in the following table:
 
Cylindrical Roller Bearings  
Cylindrical roller bearings do not typically experience significant axial loads, so we can assume the following: 1. Equivalent Bearing Static Load: F_{static} = F_{srad}
2. Dynamic Load: F_{dyn} = F_{srad}
 
Needle Bearings  
Needle bearings are designed to only withstand radial, not axial loads so that: 1. Equivalent Bearing Static Load: F_{static} = F_{srad}
2. Dynamic Load: F_{dyn} = F_{srad}
3. Safety Factor: So >= 3
 
Tapered Roller Bearings  
A load component is produced in the axial direction when radial loads are experienced by angular contact and tapered roller bearings. Because of this asymmetry, these types of bearings are often used in pairs, either face to face or back to back. The axial loads can be calculated using the following equation: Component load in the axial direction = F_{ai} = 0.6 F_{srad} / X_{dax} Let us assume that radial loads R_{1} and R_{2} are applied to bearings 1 and 2 respectively, and an external axial load F_{ae} is applied as illustrated. If the axial load factors X_{dax1} and X_{dax2} and the radial load factor X_{drad} apply, then the equivalent loads P1 and P2 can be calculated as follows: 1. Combined, equivalent static load: 2. Combined, equivalent dynamic load:  
Angular Contact Ball Bearings (40º Angle of Contact)  
A load component is produced in the axial direction when radial loads are experienced by angular contact and tapered roller bearings. Because of this asymmetry, these types of bearings are often used in pairs, either face to face or back to back. The axial loads can be calculated using the following equation: Component load in the axial direction = F_{ai} = 0.6F_{srad} / X_{dax} Let us assume that radial loads R_{1} and R_{2} are applied to bearings 1 and 2 respectively, and an external axial load F_{ae} is applied as illustrated. If the axial load factors X_{dax1} and X_{dax2} and the radial load factor X_{drad} apply, then the equivalent loads P1 and P2 can be calculated as follows: A. Single or in tandem 40º angular contact ball bearings 1. Combined, equivalent static load: 2. Combined, equivalent dynamic load: B. Back to back or face to face 40º angular contact ball bearings 1. Combined, equivalent static load: 2. Combined, equivalent dynamic load: where F_{srad} and F_{sax} are the loads acting upon the bearing pair.  
SelfAligning Ball Bearings  
1. Combined, equivalent static load: where X_{sax} is given in NSKRHP bearing tables (phone: 7347619500) for each type of bearing. 2. Combined, equivalent dynamic load: The numerical values for e, X_{sax}, X_{dax2}, X_{dax3} are given in NSKRHP Bearing Tables (phone: 7347619500).  
SelfAligning Spherical Roller Bearings  
1. Combined, equivalent static load:
2. Combined, equivalent dynamic load:
The numerical values for e, X_{sax}, X_{dax2}, X_{dax3} are given in NSKRHP Bearing Tables (phone: 7347619500).  
Thrust Ball Bearings  
Combined, equivalent static load: Combined, equivalent dynamic load:
