3725Bosch 5" random orbit sander, loss of power!!

Random orbital sander is relatively easy to use and control. You can get a lot of work done using a random orbital sander by spending a little amount of time. But, there are some things that you should keep in mind to get the best use of the sander. In this article, we are going to show you how to use a random orbital sander to its full potential.
There are many brands out there in the market right now. Each offers a different style and different controlling functions. But, the core elements of each of them are the same. The random orbital sander gives you the free and easy usability. Plus, the finishing that these sanders provide is unparalleled.

THE USE OF RANDOM ORBITAL SANDER

You can use a random orbital sander to achieve versatile woodworking functions, but mainly it is used to give your material a more smooth texture. Usually, these tools come with a lot of power so you can work on rough materials and get quick results. The design is very compact so that you can work with ease, even with one hand. So, ultimately this is a sander that will give you great power and control in a compact body.

HOW SHOULD YOU DEAL WITH THE TOOL?

Keep the Object Locked
Make sure that the object that you are working on is properly locked. Keep it secure, so it does not move too often. This way, you have had more control over the job.
USE EVEN STROKES: You should apply even strokes in every part of the object to make sure that they are sand properly. This will result in a smoother finishing to your object.
USE VENTILATION IF NEEDED Try to remember this when you use a random orbital sander, keep the ventilation on. It creates dust particle that cannot be easily controlled. So, you should keep your ventilation on to avoid the debris in your mouth.
CHOOSE THE RIGHT KIND OF SAND PAPER Different kind of wood respond well to different kind of sandpapers. So, you should look out for what is best for you and then buy your sandpaper accordingly. Make sure to properly place the sandpaper on your sander and that your sander head is clean at the start.
DOUBLE SAND THE EDGES: It is always a good idea to double sand the edges if you are looking for perfection. This allows the object to have a more fine tuning and luxurious look.

THINGS TO KEEP IN MIND:

• Do not change the disk of random orbital sanders very frequently as it will not be cost-effective. Use it until the very end.
• Do not apply too much pressure while working on the edges
• Add vacuum if you want to keep your station clean.
• Sand with a steady hand and turn up the power for rough woods.

Source: Detailed Guide On How To Use Random Orbital Sander

Mine also, in the middle of a job and it just stopped, no warning , did not slow down or bog just quit.

using the wrong paper for the machine
the sander pad should be like velcro surface to work with felt back pads

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

Seems time for a new sander.

Never start the Sander without first placing it against the surface to be sanded. In free air the Sander will not osolate.

The armature windings have an overlay problem in the wiring causing this and there is no soluation except to replace the armature which is not cost efective unless you are still under Warrantee and get a free replacement, it will burn up at some point. If you bought it within the last month take it back and get a new one, over one month, pack it back up in the original box and send it to address in the owners manual for repair or replacement service addresses.

Hi, The main drive belt broke. Not hard to replace, it is under the disk pad. Good Luck!

You should really take it back to place of purchase and get it replaced/fixed under waranty. If you try anything other than checking the fuse you will invalidate the warranty. Most manufacturers allow retailers to replace faulty tools within seven days of purchase. Be sure to take your receipt with you as a copy will be needed for the shops warranty claim.