1) It is particularly important to choose a suitable grease. Under heavy load and high temperature conditions, it is recommended to use synthetic grease (base oil is synthetic oil). In the case of heavy load, choose the grease containing molybdenum disulfide. Grease that can take care of both: such as Shell's ETK2. Hangzhou has Runbao; Ultra-high temperature heavy load grease.
2) For the supply of grease, as long as there is grease on the lubrication (friction) surface, a good oil film can be formed. It's also a waste to add more. Generally, half-cavity lubrication is recommended for bearings.