Question about Tools & Hardware - Others
SOURCE: belt won't stay on belt sander
Check first that you have retensioned the belt... i.e. when you removed the other belt, you would have had to pull on a spring-loaded lever to remove the belt tension before you added the new one... make sure the tension lever is flipped back in to ensure the new belt is tensioned...
Next, and the likely problem you are having, is belt tracking... There should be an adjustment knob up near the front of the sander near the front roller, either on top of the front part of the sander, or to the side near the front roller... When you turn this knob, it makes the belt track either left or right over the sander's base. This knob will allow your belt to run square and true and not spin off to one side...You need to adjust the tracking using this knob while the belt sander is running and with the new belt tensioned and in place, so turn the sander upside down, and power it on with one hand, then turn the knob with the other hand whichever way is needed to have the belt track square and in the middle of the rollers. Make small adjustments on the tracking knob to begin with. They can be sensitive at times.
That should stop your belt spinning off to one side.
Posted on Mar 18, 2009
SOURCE: Black & Decker 3X21
I have one of those and I just smack the front roller ahead with a brass or plastic hammer. I hit the movable bracket that the roller is attached to. It takes a pretty stout whack to do it though. hope this helps you
Posted on Jan 14, 2010
Testimonial: "Thanks for the help, I wasn't sure if there was some magic button I was missing. Tks, jw "
SOURCE: broken drive belt on belt sander
My answer comes almost a year after the original question, but I'll post it anyway for those who end up here after a search.
Black & Decker no longer supplies drive belts for the BR400 sander, but you can get a replacement elsewhere if you know what to ask for.
The belt is a synchronous, single-sided "XL" series belt, and mine had 120XL031 printed on it. The belt width is 0.31in or 5/16in or 7.9mm. Its pitch (distance from tooth to tooth) is 0.20in or 1/5in or 5mm. Its total height is 0.09in, and tooth height is 0.045in. It has 60 teeth, making the total length 12in.
I found a replacement at sdp-si.com, part number A 6R 3-060031.
Look here for timing belts (inch), then narrow the search for single-sided, .200 (XL) pitch, 60 grooves, 5/16 width.
Posted on Jun 16, 2010
I read elsewhere of someone using JB Weld to fill in the pentagonal hole in the bottom plate, after coating the armature of the motor with a light coating of oil to keep the JP Weld from sticking. Assemble, and set aside for the JB Weld to set up.
Posted on Jul 13, 2010
SOURCE: how do you change paper
At both ends of the bottom pad, there are metal fittings that have a rectangular hole in the middle of them. Take a regular head screwdriver and put the tip in the hole and carefully but firmly lift up and hold while at the same time pushing the narrow edge of the 1/3 sheet sandpaper up under the metal piece which kind of looks like a C on its edge. Then let down the metal piece with the screwdriver and that edge of the sand paper should be held in place. Do the same thing for the other end of the sandpaper, making sure to pull the sandpaper sheet tight against the rubber pad.
Posted on Dec 04, 2010
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