A NLGI 2 grade grease is the most commonly used in electric motor applications.
What is the best grease for electric motors?
The grease consistency preferred for electric motors is normally NLGI 2 or 3, with a base oil viscosity of 100-150 cSt @ 40°C. Other characteristics to look for include good channeling characteristics, low oil bleed, oxidation resistance, anti-wear additives, and mechanical stability.
How do you grease an electric motor?
The general procedure for greasing is as follows:
- Lock and tag out the electric motor.
- Wipe grease from the pressure fitting, clean dirt, debris and paint around the grease relief plug. …
- Remove the grease relief plug and insert a brush into the grease relief as possible. …
- Add grease per Table 1.
Do electric motors need grease?
Most electric motors are designed with grease-lubricated, antifriction, rolling-element bearings. Grease is the lifeblood of these bearings because it provides an oil film that prevents the harsh metal-to-metal contact between the rotating element and races.
Can you over grease an electric motor?
Don’t over lubricate your bearings
Over lubrication can cause the grease or oil to get into the windings. This will cause the insulation to deteriorate around the winding, resulting in arcing and shorting inside the motor to the case. Over lubricaiton will also cause excessive heat and wear on the rotor and stator.
Is WD 40 safe on electric motors?
Yes, WD-40 is safe to use on electronics. It is used frequently to dry out auto ignition systems as it it non-conductive, displaces water, and lubricates the parts without getting sticky.
How often should you grease electric motors?
When the operating temperature is between 80°C – 100°C (176°F – 212°F), oil should be replaced at least every three months. For critical equipment, it is advisable that lubricating oil be analyzed at least every three months to determine when oil replacement is necessary.
Can you oil an electric motor?
Expert advice: When oiling an electric motor, be sure to use oil that’s specifically designed for motors. When oiling an electric motor be sure to use special oil for lubricating electric motors. Other oils could cause excess wear and premature failure.
What will happen if you do not grease or oil the pump and motor?
Answer. Answer: It will have catastrophic failure due to overheating.
How do you clean electric motor windings?
Originally Answered: How do I wash the winding of an electric motor? Dip the winding in hot fresh water and let it stay there for ~ 20 min to loosen dirt & grease. Repeat if necessary. Air dry and if feasible oven dry thereafter.
Can you put too much grease in a wheel bearing?
Too much grease builds pressure, pushing the rolling elements through the fluid film and against the outer race. The bearing now has to work much harder to push the rolling elements through a mud bog of grease. The increased friction and pressure from too much grease raises the temperature inside the bearing.
What are the types of grease?
Types of grease and their uses
- Calcium grease. Calcium grease is one of the first greases that was manufactured for general use. …
- Lithium grease. …
- Aluminium complex grease. …
- Barium complex grease. …
- Bentone (clay) grease. …
- Polyurea grease. …
- Sodium grease. …
- Base oil.
What kind of oil do electric fans use?
Lubricate with nondetergent SAE 20 oil. Place 1 to 2 drops in each oil port. Be very careful not to use too much oil or get the oil into the motor.
What does ZZ stand for on a bearing?
ZZ bearing means that it has metallic shields (yellow metal shield) on both the sides.
What does the NLGI number of grease indicate?
The NLGI number is a measure of the grease’s consistency as indicated by its worked penetration value. … The higher the consistency, the more resistant the grease is to releasing lubricating fluid under force. A grease with a low consistency will release lubricating fluid more readily.
Can you over grease excavator?
That said, you can also over grease parts, and this can be just as harmful as not using enough. Too much grease will spill out of where it’s needed and make a mess on the surrounds. … Keep the grease within the confines of where it’s doing its job and leave it at that.