How to maintain the slewing bearing of crane?

The slewing bearing of crane is an important joint of crane, so its maintenance is very necessary. For the maintenance of slewing bearing, we should do the following procedures：

Check the bolts on the slewing bearing

1. check the bolts on the slewing bearing visually before each operation of the crane.

2. After the operation of the slewing bearing for the first 100 working hours, we should check whether the bolt is loose or not; check again when operating for 300 working hours; check every 500 working hours thereafter. If bolt is found loose in inspection, please stop the operation and ask the professional technician to check.

3. Fill the slewing bearing with lithium grease before installation.

4. When changing bolts, wipe them clean and fasten them after using retainer; use cranes according to operation manual and lifting performance table; check fastening bolts as required.

Regular check of slewing bearing

1. Check the flexibility of rotation regularly. If noise and impact are found, we should should stop the machine immediately and do troubleshooting.

2. Check whether there are cracks or breakage in the gear ring. 

3. Check the seal condition regularly. If the seal is damaged, replace it in time. 

Drum Roller Bearings heat treatment

Fundamental types of drum-type roller bearings either using window glass fiber reinforced polyamide (nylon) 66 stick frame (suffix T), also can be machined solid brass stick rack (suffix MB). Glass fiber reinforced polyamide 66 insist on lower shelf stable up to temperatures form 120 ℃. If the bearing oil is smooth, then smooth oil additive ball bearing will reduce the use of stick frame life of aging oil at low temperatures also have an adverse effect on the stick rack; therefore necessary to monitor the oil change.
Drum Roller machine tool spindle Bearings heat treatment
After heat treatment of the FAG drum roller bearings, tasks temperatures up to 150 ℃, the temperature of the outside diameter of 120mm beyond the task of bearing up to 200 ℃, the size is still able to adhere firmly. If the bearing polyamide stick frame, the frame data necessary to pay attention to adhere to temperature constraints.