If a shaft fails check the condition of the plate, it may be a good time to replace the complete unit.
Replacement shaft may be supplied loose or carded. Comes complete with both nuts.
If you only need a replacement nut we can supply them separately.
Reasons for Shaft failure
Almost all shaft failures are caused by not following the instructions.
If the tool is used correctly shaft failures are rare, and usually occur after years of heavy use.
When the tool is not presented at right angles to the surface the shaft bends backwards and forwards on each rotation of the tool, up to 3000 times per minute. It can take this for a limited time but with prolonged misuse the high tensile steel wires in the shaft break due to metal fatigue.
Dust also dries out the oil on the centre of the shaft and during storage dampness or condensation may start rusting in the wire core. As well as weakening the metal the rust particles act as an abrasive causing further damage when next used. To prevent this oil the centre of the shaft occasionally.
The original Flexi-disc has a different shaft design with two identical steel nuts.
The plate does not have the pip for holding a later version shaft securely.
The name was originally Flexi-disc but has been replaced by Flexidisc.
These are at least 30 years old and spare parts are no longer available.
Recent versions of the Flexidisc have a silver plate and black shaft.
These changes are just cosmetic so parts are inter-changeable.
When taking the unit apart the steel locking nut and the black plastic nut have a left hand thread so have to be unscrewed clockwise. The shaft can then be pushed out of the plate.
The current version has been in production for about 30 years.
Steel plate with attached rubber pad and Velcro type hooks.
The usual cause for discs not attaching firmly to the plate is because of previously using the sander without attaching a disc which permanently damages the hooks on the plate.
A less obvious cause is the false economy of using cheaper quality discs which can generate heat. The heat passes through the disc and if it gets hot enough it can melt the tips of the hooks. A similar heating effect can occur if excessive pressure is applied during use.
Catching the edge of the sander against protruding objects like nails can slice the rubber under the surface.
Tip: We fit a disc to the plate when not in use to help prevent accidental use without a disc.
When re-assembling the Flexidisc ensure the pip on the plate locates into the recess in the shaft.
Tighten the black plastic nut securely. Details below.
Replacement Flexible Shaft
How it goes together
Ensure nut is tight
Remove shaft from packing container
Locate plate pip into hole in shaft
The way we hold it when tightening nut
Note nut has a left hand thread
Only add locking nut when needed to lock shaft solid