want to do is heated to 300 degrees how

Answer: AUELY bearing heaters have two modes: time mode and temperature mode
   As temperature probe can withstand the highest temperature of 250 degrees and choose the highest temperature value is also heated above 250 degrees to 250 degrees so you must use the time mode, simultaneously with an external temperature tester to determine the (common with contact and infrared gun)
 With regard to residual magnetism
A: In order to prevent bearing residual magnetic effect on the bearing operating AUELY heater set two kinds of degaussing process: automatic degaussing / manual degaussing
   Automatic degaussing after the heating run automatically, manual degaussing for residual magnetism on the special requirements of the special design of the workpiece. (Manual degaussing should be removed on the workpiece temperature probe)
10 With regard to the principle degaussing
A: The presence of any ferrous materials have hysteresis loops, the heating process, the workpiece current flowing through the large hysteresis loop is also great, if the power supply is suddenly cut off, it may leave a large remanence, through effective control of SCR, so hysteresis loop shrinking, then cut off the power supply, there will be no residual magnetism of the workpiece.
Stud type track rollers Stainless steel slewing bearing
Curve roller bearings (aka Bolt roller bearings) KR series, KRV series, NUKR series bolt type roller bearing is G20CrMo bolt shaft through HVI ≥ 664, effective hardened layer 1.3mm refined, and then by the group as a roller roll Road bolt and a thick-walled outer ring combinations. A shoulder bolt shaft and the pressure in the screw ring formed on the end face of the outer two lateral direction along the guide surface. When the curve at the level of the roller or the roller moving on the cam disc, due to the elastic deformation of the outer ring, the roller to increase the internal stress. Therefore, this work applies to the case of the rated load curve wheel column, select: