CHAPTER VI 



POWER TRANSMISSION ELEMENTS 

 AND MECHANISMS 



Charts and nomograms for determining shaft and bearing sizes, horsepower 

 transmitted by flat and V-belts, and tyJDical examples of safety gear design, gear 

 shifting mechanisms, bearing seals, gibs and guides, and cams. The final pages 

 cover typical constructions of mechanical linkages. 



Flexible Couplings 152 



Shaft Diameters for Torsion and Bending. . 161 



Shaft Diameters for Torsional Deflection. . 162 



Shaft Diameters for Lateral Deflection 163 



Shaft Diameters— A.S.M.E. code 164 



Two-bearing Shafts of Uniform Strength . . 166 



Stress in Rotating Disk 167 



Velocity Chart for Gears and Pullej^s 168 



Flat-belt Length and Pulley Diameter 169 



Flat-belt Speed-horsepower Charts 171 



Belt Horsepower Charts 172 



Flat-belt Horsepower Charts 173 



Flat and V-belt Horsepower Charts 174 



V-belt Lengths 175 



Short-center Belt Drives 176 



P.\GE 



Chart for Calculating Needle Bearings 178 



Thrust Bearing Friction Moments 179 



Bronze Bearing Alloys 180 



Shaft Seals 182 



Roller-bearing Seals 184 



Sleeve-bearing Seals 186 



Safety Gears 188 



Shifting Mechanisms 190 



Gibs and Guides 195 



Cam Designs 198 



Variable-speed Devices 199 



Transport Mechanisms 201 



Automatic Feed Hoppers 203 



Glue-applying Mechanisms 205 



151 



