DIY- Planer-Jointer Blade Sharpening Fixture

[Janderso]

It sure is nice to dream up an idea, go out into the shop and whip it up in less than an hour.
I found this 4" Rockwell planer-jointer on Craigslist.
I'm going through it to get it ready to use and hand over to my son. He's a starving teacher in the California school system. (proud PaPa)
I like to help him where I can.
This is just a block of hot rolled steel, I put it in vinegar for 3 days to remove the thick layer of mill scale. Used the horizontal saw to cut a block a bit longer than the blades.
I then placed the block at a 35 degree angle in the Kurt vise. Used a 7/8" end mill to seat the blade into the block for a secure and repeatable position.
This will allow for the planer blades to be sharpened on my surface grinder.
I'm using a CBN wheel that puts a mirror finish on parts.
I'll just drill and tap 10-32 to hold the blades to the block.
I don't know if this is the only one in existence or if this is a common idea?? It just came to me one day.

 

[jwmelvin]

Looks like a good approach to me. Did you relieve the inside corner on the block? It looks like it, and that seems good if possible (depending on the cutter’s edge radius).

 

[Janderso]

Looks like a good approach to me. Did you relieve the inside corner on the block? It looks like it, and that seems good if possible (depending on the cutter’s edge radius).

No I didn't, good idea.
Would you set up the cut with a slitting saw?

 

[jwmelvin]

No I didn't, good idea.
Would you set it up the cut with a slitting saw?

I was thinking about how I’d do it and decided that a slitting saw would be better than a tiny end mill. So at least the two of us have that inclination.

 

[DavidR8]

Good work Jeff.
This is super timely as I was thinking about how to do this for my planer blades.
Thanks for saving me some trouble!


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[ErichKeane]

No I didn't, good idea.
Would you set up the cut with a slitting saw?

Use a shaper with a pointed tool

 

[Janderso]

Use a shaper with a pointed tool

That could work.
Not everyone has a shaper.

 

[ErichKeane]

That could work.
Not everyone has a shaper.

It seems like they should!

 

[Janderso]

Good work Jeff.
This is super timely as I was thinking about how to do this for my planer blades.
Thanks for saving me some trouble!


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David,
The chips in your Avatar look like you've been using a sharp parting tool.
Am I close?

 

[DavidR8]

David,
The chips in your Avatar look like you've been using a sharp parting tool.
Am I close?

Pretty close, those are 12L14 chips made with a freshly ground HSS tool a la @mikey.
I was pushing my poor SB 10K to see how deep a cut it would take. On a 1" diameter workpiece I was able to manage about .07" DoC at about a .005 feed rate.
That instantly made me a believer in a sharp HSS tool!