Author Topic: Creating Alternative Knobs for Metric Tools  (Read 3091 times)

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Offline OlderThanDirt

  • Posts: 3
Creating Alternative Knobs for Metric Tools
« on: June 01, 2017, 05:02 PM »
FOG members mention that Festool knobs can be used to secure Veritas Parf Dogs and other devices to an MFT top. These use an M8 metric thread. I need a few knobs, but don't have Festool hold down devices with knobs. I cobbled several together and then came up with another homemade solution.

I bought M8-30mm threaded bolts, a pack of 5/16 x 1-1/2" diameter fender washers, and found a handle bolt kit with two knobs in the lawnmower department at Home Depot. Punching out the standard nut in the kit, I used J-B Weld epoxy on the M8 bolt head and slipped it right into the lawnmower handle knobs. Two knobs for about $5.50. I can mount the long Parf dogs or small dogs, to the 3/4" MDF table by slipping a fender washer over the knob and slide it up through the dog hold into the Parfs.

While working on the first solution, I spotted a couple of of orange juice, heavy plastic screw-on tops that I use for risers when painting shelves. Bingo. I cut a small square out of plywood, (a round hole saw cut out would also do), to fit the inside circle. Then, I drilled a hole to fit the M8-30mm bolt and counter sunk it so that the hex head would wedge into the square. Some J-B Weld and I had much cheaper, extremely sturdy, OJ Parf knobs. ;D

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Offline live4ever

  • Posts: 783
Re: Creating Alternative Knobs for Metric Tools
« Reply #1 on: June 01, 2017, 05:21 PM »
Sounds like you found yourself a nice solution.  We'd love some pics...

You can buy star knobs (the usual woodworking jig type) with M8 studs of varying lengths on Amazon (the brand is uxcell).  Lee Valley also sells those same knobs here.
Current systainer to productivity ratio:  very high