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The coin size discs are a common method to remove/insert the brushes.
I would remove them. They may have decent length left. The problem may be the commutator having oxidized over time. CAREFULLY try cleaning and light sanding with a fine grit paper. You may need to remove the rotor for better access.
Most roller guides are model specific due to each manufacturer having different dimensions.
Take a look at an earlier thread on bandsaw fences.
http://www.woodworkingtalk.com/f27/shop-made-bought-bandsaw-fence-lets-see-44227/
I would check the tuning of your saw before you use a fence since it may not track straight. This Alex Snodgrass video is the best I have seen. It helped me improve the performance of my bandsaw.
http://www.woodworkingtalk.com/f2/band-saw-tune-up-u-tube-video-40292/
I would remove them. They may have decent length left. The problem may be the commutator having oxidized over time. CAREFULLY try cleaning and light sanding with a fine grit paper. You may need to remove the rotor for better access.
Most roller guides are model specific due to each manufacturer having different dimensions.
Take a look at an earlier thread on bandsaw fences.
http://www.woodworkingtalk.com/f27/shop-made-bought-bandsaw-fence-lets-see-44227/
I would check the tuning of your saw before you use a fence since it may not track straight. This Alex Snodgrass video is the best I have seen. It helped me improve the performance of my bandsaw.
http://www.woodworkingtalk.com/f2/band-saw-tune-up-u-tube-video-40292/
