Medical casters, medical equipment wheel, exporting medical rounds, the control wheel, castor wheel construction of hospital beds 
 By a single wheel mounted on the bracket is made for the installation of the equipment below to make it move freely. Casters can be divided into two categories: 
 A fixed castors 
 Fixation coupled with a single round, can only move along a straight line. 

 B Caster 
 Coupled with 360-degree turn to the single-round bracket, is able to travel in any direction. 

 Installation height 
 Refers to the installation location from the ground to the vertical distance between the castor mounting height is the floor with the caster wheel remote with the largest vertical distance. 

 Stand away from the steering center 
 Refers to the vertical line to the wheel center rivet the horizontal distance from the core center. 

 Turning radius 
 Refers to the vertical center line of rivets to the outer edge of the horizontal distance the tire, proper spacing so that wheels can turn 360 degrees. Turning radius is reasonable or not directly affect the caster's life. 

 Medical casters, medical equipment wheel, exporting medical rounds, the control wheel, driving wheel load bed 
 When the load-bearing capacity of the mobile casters. Also known as dynamic load. Casters and the dynamic load due to the implementation of standards and test plant in different ways and different. Also due to different materials and different wheels. Lies in the structure and quality of the stent is able to shock and vibration. 

 Impact load 
 When the device by the host material impact or vibration the moment when the load-bearing capacity of casters. 

 Static load 
 Casters in the stationary state can bear the weight. Static load in general should exercise load (dynamic load) is 5 to 6 times the static load should be at least 2 times the impact load. 

 Shift 
 Hard, narrow wheels than the soft, wide wheels easier to turn. Turning radius is an important parameter of the wheel turning, turning turning radius is too short will increase the difficulty of shaking the wheel is too large and will result in shortened life expectancy. 

 Travel flexibility 
 Affect the flexibility of the factors driving wheels: steel stent structure and stent selection, wheel size, wheel type, bearing and so on. Greater flexibility to better driving wheel, on the ground in a smooth, hard, flat side than the narrow round soft wheel effort. However, uneven ground, soft wheel effort. However, uneven ground, soft wheels to better protect the device and shock absorber. Medical casters, medical equipment wheel, exporting medical rounds, the control wheel, round beds