Make your own Norton Commando Disc Brake Caliper Peg Spanner Tool


Norton Commando Disc Brake Caliper Peg Spanner Tool

Tool hounds will likely prefer to buy the “correct” factory tool to remove the brake caliper piston plug on Norton Commando front brake disc calipers. It works perfectly, of course, but at around $90 it’s a pricey bit of kit – especially if you’re only going to use it once or twice, or at least very occasionally.

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That – and the fact we’re cheap – moved us to see if we could make our own. We did, and it couldn’t be easier. The peg spanner is, after all, nothing more than a solid bar with two pins set to locate in the caliper plug so the plug can be loosened. You can buy all the materials needed for less than $5, or if you’re like most of us, just scrounge around the shop ‘till you find a piece of scrap steel and some 1/4-inch bolts, nuts and washers.

Tools and materials used:

  • 1-foot piece of 1/4-inch x 1.5-inch flat steel bar
  • 2 x 1/4-inch fine-thread high-grade steel bolts, 1-inch long
  • 2 x 1/4-inch fine-thread nuts
  • 4 x 1/4-inch flat washers
  • 1/4-inch high-speed metal drill bit
  • 3/8-inch high-speed metal drill bit
  • Center punch
  • Sharpie
  • Square
  • Drill

Lay the piece of flat steel across the center of the caliper plug and mark the center of each hole as shown. They should end up roughly 13/16-inch apart. Be as accurate as possible but if it’s not exact it won’t matter, as you’ll see. We were installing a new stainless steel caliper plug, so we used it to make our marks.

Norton Commando Disc Brake Caliper Peg Spanner Tool

6/2/2015 2:56:42 PM

Thanks Dave, I've got one of those in my toolbox now. Back when we did this How-To, I hadn't found the ready made tool.

5/28/2015 3:00:07 PM

Harbor Freight has a oeg spanner for only a five bucks. Will fit the Norton caliper. Item #36554

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