Universal fingernail grinding jig for woodturning gouges
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Fits dry wheel, wet wheel, and belt grinders. For profiling and sharpening spindle gouges and bowl gouges.
- Ocena
- 5 / 5
- Polubienia
- 16
- Pobrania
- 89
- Wydruki
- 1
- Wyświetlenia
- 739
- Oceny
- 1
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- Printables
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- Tools
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- Creative Commons — Attribution — Noncommercial — Share Alike
You can use the jig like you would a Oneway Vari-grind jig, or use it with a holder for bar guided systems like the Sorby ProEdge or Tormek and similar wet sharpeners.
UPDATE :
The main part of the jig now comes in 3 sizes :
- 16mm and 19mm diameter hole both have a slimmer profile, which allows more clearance one the side of the gouge. They will hold gouges up to 13mm and 16mm in diameter.
- 22mm diameter hole is the older version, much thicker and will hold gouges up to at least 19mm in diameter.
- the little V shim will help with clamping of very small diameter gouges.
The bar holder is now thicker for reduced play with the arm rod angle. It has 3 positions for the arm rod : long, medium and short. However on a holder with all 3 positions the gouge handle may lack clearance if the jig is in the first hole, so the holder comes in short & medium and medium & long version.
/!\ Obviously this is plastic so watch for the heat if you are grinding heavily.... note that HSS tools can be cooled with water but do this only if they are only starting to heat up. If your HSS steel is very hot water will damage it.
ASSEMBLY :
Drop an M8 nut into the slot on top of the fingernail guide. Insert screw from the top. Place a small flat shim of your choice between the gouge and the M8 screw. Tighten by hand, the gouge is secured.
For the arm, brute force an M8 threaded rod into the 7.5mm hole. You might want to lock 2 nuts together at the end of the rod so you can use a wrench for extra torque. Once in place it will stay there. Cut to length.
/!\ Be careful not to bend the threaded rod when screwing it into the plastic. It requires significant torque and the rod must remain perfectly straight for good sharpening results.
The adjustable arm is secured with an M6 bolt. A wingnut might work but a regular nut allows for stronger tightening and more rigidity.
This will also work with 5/16" screw and threaded rod if you are one of those people ;) For the adjustable angle arm, since it is deisgned for an M6 bolt you can use a ¼" screw but you would have to file the hexagon head down a little bit… and widen the M6 hole.
ROD HOLDER :
They are made to fit an M8 threaded rod with enough slack to allow rotation without the threads biting in. Might need some light filing depending on print quality. Sorby ProEdge has a 12.7mm diameter guide bar. Tormek has a 12mm bar. Other brand machines would have either one of those.