My SXE450 sander stops spinning when load is applied to the disk. The motor runs smooth, orbital movement is ok and the disk spins until even a little load is applied. Results is that is doesn't remove any wood.
YOUR BALLBEARING where the disk is on mounted is the right bearing that have the problem for shure it is full of dust or completely dry it will not turn anymore SIMPLY TO CONTROL IF YOU MOVE YOUR DISK NOW ON YOUR MACHINE YOUR ARMATURE TURNS DIRECTLY WITH THE DISK thats not good the armature must stand still , replace the ballbearing or remove it and open it with a very little sharp screwdriver on the both sides solvent it out try to turn the bearing carefully until its turns without problems dry it or blow it out with a compressor and if its dry lubricate with ballbearing grease close it again and mount it again
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There is a ball bearing bearing on position 29 that is dirty replace it or remove and clean it open the sealings with a very little thin screwdriver solvent it out and re grease it and close the sealings again. Hitachi SV13YA 5 Variable Speed Random Orbit Finishing Sander Parts
If you go on a Bosch factory web site you should be able to enter your model and down load a parts list. From that you will see that the motor drive an eccentric dog that causes the plate to jitterbug. If you kept the original paperwork you will have had this with it. All Bosch units come with warranty and parts list. Look up your nearest Bosch tools agent, see if he'll strip it if you can't and determine what's needed. You may find its easier and more cost effective to shop around online for a special offer and buy a new one. Not very green I know but may be more practical.
this unit takes 90 pounds per constant for desired function. Most machine shops have Huge compressors that will run these at a constant rate ,, also check the exhaust ( towards the vacuum hookup to check for clogs,, ) compressors that have a gauge that read 90 lbs doesn't necesarly mean they have the CFM to keep the pressure at what you need to keep it running
I may not have the whole picture, but all random orbits spin wildly if they are not pressed onto the wood a little. Do you mean it is not oscellating, but just spinning when it is on the wood? That would be an issue requiring cleaning or repair, otherwise, just don't turn it on until you have placed it on the wood to avoid marring.
Farmerbear:)
Im not sure what you mean "out of control" but the tool is only meant to be on while in use . If the tool is really going crazy ,pull off orbital and check all screws and tighten accordingly
The armiture has a winding problem, common in a lot of power tools. Replacing the armiture is not cost affective unless your time put into it is worth it, sorry. I recomend the Dewalt veriable speed, nice professional buffer!
OK the belt tensioning mechanism is spring loaded. First what is the quality of the belts are they real flimsy or stiff. You say the rollers spin but my question does the rear roller still spin and the belt remain stationary. If so the rubber belt on motor is bad. I would take a look for excessive wear on the rear roller. Does the yoke mechanism snap forward or move slowly, look for a build up of sawdust in this area that might be restricting movement on the yoke. The wear plate in still good condition. One other thing on the belts are they directional? Do they have an arrow on the inside if so that has to point toward front of tool. I looked at a breakdown and could not see anything else to suggest. I never had this problem except with belts when I was at Makita.
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