PTFE washer lubrication

Andy Higham

Andy Higham

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I have been doing some research on industrial applications of bronze loaded PTFE bearings, the same material as the A.N. Isolastic washers.
For almost all applications NO lubication is required.
There is one application where lubrication IS ADVISED, rapid oscillation. I would think a Norton engine jumping up and down / forward and backwards at up to 7500 times per minute or 25Hz would be rapid oscillation
I am thinking SP-90 dry silicone lubricant spray
 
Andy Higham said:
I have been doing some research on industrial applications of bronze loaded PTFE bearings, the same material as the A.N. Isolastic washers.
For almost all applications NO lubication is required.
There is one application where lubrication IS ADVISED, rapid oscillation. I would think a Norton engine jumping up and down / forward and backwards at up to 7500 times per minute or 25Hz would be rapid oscillation
I am thinking SP-90 dry silicone lubricant spray
Click to expand...
Does it need lubrication?
 
Removing the gaitors keeps the assembly cleaner and it's easier to clean and inspect the iso's. The gaitors seem to attract dirt when they are supposed to protect the assembly from dirt.
 
l spray both front and rear isolastics with Teflon or silicone sprays , about 3 times each riding season . The rear covers have been removed . The front remain in place as the front sees a lot more dust and dirt .
The covers if neglected can act as dirt collectors.
 
kommando said:
Removing the gaitors keeps the assembly cleaner and it's easier to clean and inspect the iso's. The gaitors seem to attract dirt when they are supposed to protect the assembly from dirt.
Click to expand...
Rubbers keeps water and mud, etc.. ,Even oil from a leaky engine out. In the old days we used to do a little off roading down the nice woods trails and dirt roads that got us to the best, secluded places and beaches to hang out .
 
Speaking of best secluded beaches to hang out on , greetings from Busua beach Ghana Africa .
Motorbikes don't last long here from the humid salt sea air . Rusty carcases abound .Enjoy .
 
The testing at the factory that made PTFE bushes showed that oil over dry gave a doubled life on the bushes. Where the ISO's are there is the risk of oil combining with grit to make a grinding paste so dry or a PTFE spray would be the better option over oil.
 
I find myself paying attention to the gaiters themselves rather than the internals they cover.
The rubber compound they use sucks. Brand new ones started cracking and breaking down within the first 6 months of installation. The bushings I used are self lubricating.
 
If the crankshaft is balanced to suit the rev-range within which the motor is most commonly used, the isolastics might be less important. It is probably unrealistic to expect a Command to be good around town and also at very high speeds. At speeds below 50 MPH, my Seeley 850 is a camel - at 100MPH, it is lovely. Rigid mounted motor just makes the effect more noticeable.
 

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