they never need to be relubricated just replaced
As often as they wear out!
You should lubricate your bike chain every 100-200 miles or if it looks dry or squeaky.
Pivot bearings are frictionless bearings and suitable for pivotal, angular, or oscillating applications. Collar bearings are often used install equipment with a simple set screw.
Well to begin with how often do you use your trailer? I recommend that you should check and grease your bearings every six months at the least.
lube the whell bearings once a year is usually all that is needed
It is recommended to lubricate brakes every 6 months or 6,000 miles to maintain optimal performance and longevity.
It is recommended to lubricate the furnace blower motor once a year to ensure optimal performance and longevity.
If your vehicle has grease joints, every oil change.
the deck or the bearings
With each brake job.
An automobile locksmith can be found by using the local telephone directory for one's area. Automobile locksmiths will often list their services in the advertising section of a telephone book.
You should lubricate your garage door every six months to keep it running smoothly and prevent damage from wear and tear.