How is bearing end play measured?
Measure the end play by pushing and pulling on each side of the hub or drum while looking at the dial indicator. The end play is the total travel observed. If the end play is 0.001-0.005-inch (0.025-0.127 mm): The bearings do not need adjustment.
What is crankshaft end play definition?
Crankshaft “end play” is measured as the clearance between the crankcase thrust washer and the axial mating surface of the crankshaft (see Figure 1).
What is motor end play?
End play in an electric motor is the amount of axial movement allowed by the motor’s construction. This end play is limited by the motor’s bearing design. The bearing’s primary purpose is to locate the shaft radially so it can be aligned to the driven equipment shaft and efficiently transmit torque to the load.
Why do hub bearings need end play?
When it comes to wheel bearings, a small amount of end-play is required to keep the rollers from making hard contact with the races, because hard contact creates heat and wear.
Which component of wheel bearings holds the rollers or balls in place?
Most wheel bearing assemblies include the following components: an outer race, an inner race, roller bearings or ball bearings, and a bearing cage to hold the rollers or balls in place (FIGURE 8-1).
What causes bearings to fail?
While it may seem like common sense, standard wear and tear is one of the leading causes of bearing failure. Eventually all bearings fail due to wear, however, excessive load, vibration or force can cause a bearing to wear out long before it should. Most of this excess force is caused by improper installation.
What causes main bearings to fail?
Misalignment of main bearing bores can be caused by crankcase distortion or improper machining tolerances. Oil starvation or insufficient lubrication is one of the most severe forms of bearing failure.
What is the race of a bearing?
Races are essentially tracks that allow the balls within ball bearings to glide while generating little or no friction. They offer a fixed path on which the balls can roll. Ball bearings require races to control their respective balls. With races, the balls can roll along a fixed path.
When to remove end play from radial bearings?
Tighter values of radial play will of course control and restrict radial movement. When axial positioning must be controlled or end play of “zero” is desired, it is recommended that the end play be removed by applying axial preload via shims, washers, or other assembly methods. Duplex bearings should be considered as well.
What is the purpose of End play on a thrust bearing?
Changes in End Play The purpose of thrust bearing end play is to provide axial clearance between the thrust collar and the thrust bearing assemblies. The end play allows room for the formation of an oil film, misalignment, and thermal expansion of the bearing components.
How to make a wheel bearing end play?
All that’s required is to torque the nut to 100 ft./lbs., remove the socket and reference the location of one of them, and simply back-off (loosen) the nut one “dot”. That’s it. Then just pinch and insert the lock ring in the serrations and you’re done. A very fast, easy and consistent .003″ to.004″ end play.
Which is the best description of End play?
AXIAL PLAY, or end play, is the maximum relative displacement of the bearing rings, in a direction parallel to the axis of rotation. Radial and axial play are interdependent and are determined during the manufacture of the bearing. Typically, radial play is a purchasing specification. Low backlash gear systems with predominantly radial loading.
