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Have a craftsman belt sander. Armature bearings are bad. One end has a threaded drive pully which needs to come off to get the assembly out of the main housing. My guess is I need to remove end bearing to put armature in a vise then unscrew drive pully. Problems... Space between bearing and armature is less than 1/8". How do I remove the bearing? Then what kind of socket or other tool do I need to remove the threaded drive pully?

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Be careful about putting the armature in a vice. Clamping it tight enough to pull a bearing may damage it. Now, if you have access to the first bearing, get a small bearing puller of this style http://www.summitracing.com/parts/WMR-W84551?seid=srese2 This is just an example to show what type should work. If there is not room for this, then there are other pullers made that have arms that will fit within the 1/8" clearance you have.

On the pulley, if it is a nut holding it on, then a regular socket will work. As stated be careful clamping the armature so as not to damage it. I would take a block of wood, say a scrap pc of 4x4 and bore a hole through it with a hole saw that closely matches the diameter of the armature. Cut it in half long ways, removing enough material so that when you use it to clamp the armature, the two half circle wood pcs don't touch. That way, it spreads the clamping force around a little more of the diameter of the armature.

If the actual pulley is threaded, then clamp the same way and you may have to rig something. Are there holes or slots in the pulley that a spanner wench would work on? There are several universal/adjustable spanner wrenches available for that type of thing. Check to make sure there is not a set screw in the hub of the pulley that keeps it locked from turning. A photo of this would make it easier to make suggestions.

Posted on Nov 09, 2014

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