Author Topic: Grit on a stick  (Read 614 times)

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Offline Brooklands

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Grit on a stick
« on: December 18, 2011, 04:27:02 pm »
Not knowing any better I used to tear off a piece of sandpaper, usually badly, fold it several times & eventually screw it up into an unusable mess. Then by chance I was watching a Millwright at work and when he'd finished sawing a joint he rubbed the edges over with a flat piece of wood - a bit like a butter pat - which had a half-sheet of sandpaper glued to it. I saw the light, and have saved plenty of sand and emery paper in the meantime. My stick is a piece of 1" x 1/8th aluminium strip about 16" long, with 4 different strips of abrasive held on with double-sided tape ( 3 rolls 1" wide for a £, in the Pound shop, may be less in the 99p Shop). I put the closer matching grades (say fine & polish) back to back and just flip the handle over to change. You can use this freehand, and against work held in the chuck of a drill or lathe. Aluminium won't do any harm to most things, but round the front edge & corners as a precaution. To change the abrasive warm up the strip with a hot air gun and steadily pull off the old strip complete with the double-sided tape. Remember this is not a file, but a finishing tool, so file off anything that is likely to tear through the paper surface.
You can use the same technique with a feeler gauge to give your ignition points or plug electrodes a quick polish up. I put paper on one side only as you can then feel what is happening with each contact of the points more easily. Hold a sparking plug 'downhill' so that abrasive doesn't get up into the hollow part, and then fall into the bore when you put the plug back in!
Norfolk 'n good!