474 



ENGINEERING ON THE FARM 



Fig. 367. 



After Link Belt Co 



A standard babbit bearing 



Bearings. Bearings are the supports of the rotating parts 

 of a machine. Bearings which are separated from a machine 

 are called boxes. A solid box bearing is in one piece, and a 



split bearing is in two parts. 

 (Fig. 367). A self-aligning 

 bearing has a hanger or 

 support which will permit 

 of the aligning of its axis. 

 A bearing has a suitable 

 lining held in a cast yoke 

 that can readily be re- 

 placed when worn. The 

 lining is designed to per- 

 mit the necessary lubrication and is made of material 

 that has a low coefficient of friction and is softer than 

 the journal. 



Types of bearings. Bearings are made of hard wood 

 soaked in oil, babbit, brass, and bronze. Bearings should 

 be properly adjusted. If too tight, they will heat; if too 

 loose, they will knock and heat. 



Lubricating devices. Complete provision should be made 

 for lubricating all bearings. Various types of oil and 

 grease cups are supplied to meet the requirements of 

 lubrication. In farm implements special provision is 

 made to prevent the 

 entrance of grit and dust 

 into wheel bearings by 

 means of a cup placed 

 on the outer end of the 

 box, and a dust collar 

 on the inner end. A 

 heavy lubricant is applied 

 by the method of screw- 

 ing off the cap and placing 

 it at the outer end of the box, from which it works to the inside. 



After International Harvester Co. 



Fig. 368. A wood bearing %v\th 

 oil cup 



