BMF Stumpy Inspired Homemade Powered Sharpener

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Project by SRRieman posted 03-26-2013 03:09 AM 5456 views 22 times favorited 17 comments Add to Favorites Watch

This whole project nearly happened out of nowhere. It all started out when I was trying to find a way to build Stumpy’s drill press table into my much too small HF benchtop drill press. I figured the best way was to try and increase the overall length (the tube) and well I couldn’t find anything local/soon enough that was the right size. I tried a tube just a little too tight…and ended up breaking the base of the drill press in the process. Fast forward 24 hrs and about 5 spins of neil young’s greatest hits…I found a floor model 16 speed 3/4 HP drill press on CL for under 100 bucks. Killer deal. Works fabulous. As my press was laying upside down on the floor I remembered Stumpy’s sharpening center and everything clicked. Without the MDF circles and compound, I wouldn’t have even thought of it. Only took me a day and I did everything on the fly.

The case is sandeply, the circles and the base are mdf. I also put some expanding foam inside the bottom of the case to surround the drill press, which supported it nicely and kept everything snug so that I could get the table coplaner with the honing disc. The disc is from an old orbital sander with a bolt threaded through. I only used two discs so far and two types of compound was needed. Both from harbor freight, black compound and green compound. I didn’t use any sandpaper whatsoever and it only took me about 20 min from start to finish to bring one of those cheap HF wood chisels to a mirror polished, razor sharp edge, with a micro bevel. I even gave about 5 minutes up waiting for things to cool down a bit in between the two compounds.

I once thought, I’ll be power tools only. But I’ve been using crappy chisels for months on various tasks. This is going to make me love using the ebay hand planes I’ll be buying and SHARENING soon. Overall, I couldn’t be happier.
I’d be more than happy to answer any questions.

-- Scott Rieman

17 comments so far

View hoss12992's profile


4149 posts in 2377 days

#1 posted 03-26-2013 04:40 AM

great job

-- The Old Rednek Workshop

View Routerisstillmyname's profile


763 posts in 3993 days

#2 posted 03-26-2013 04:43 AM

Good job. So that’s HF drill press flipped on it’s back?

-- Router è ancora il mio nome.

View BobWemm's profile


2680 posts in 2410 days

#3 posted 03-26-2013 08:35 AM

Now that is a good idea. I’ve been thinking of updating my drill press and wondered about a use for the old one. Problem solved. Thanks for sharing your idea.

-- Bob, Western Australia, The Sun came up this morning, what a great start to the day. Now it's up to me to make it even better. I've cut this piece of wood 4 times and it's still too damn short.

View JohnInHadley's profile


22 posts in 2478 days

#4 posted 03-26-2013 10:14 AM

What speed did you leave it set up at? Or can ou still change the speed?

View thelt's profile


667 posts in 3863 days

#5 posted 03-26-2013 12:33 PM

Just so happens I have an old HF benchtop drill press sitting in a storage shed. I put it in storage when I bought a floor model Craftsman drill press 16 speed 3/4 HP. Now I know what I can do with it.

Can you take some really detailed pictures of how you have it mounted, the cabinet construction etc… Just need more details. I’m a visual person. You can tell me all day long how to do it, but if you show it to me, I can do it.

-- When asked what I did to make life worthwhile in my lifetime....I can respond with a great deal of pride and satisfaction, "I served a career in the United States Navy."

View eztrigger's profile


161 posts in 2411 days

#6 posted 03-26-2013 12:45 PM

now that’s creative

-- "Some get spiritual 'cause they see the light, and some 'cause they feel the heat." --Ray Wiley Hubbard

View MitchMan's profile


75 posts in 2833 days

#7 posted 03-26-2013 06:53 PM

Now I want to do this with my bench grinder. Bench grinder is over 3000 RPMs, I wonder if that’s too fast to spin MDF discs.

View TNwoodchuck's profile


102 posts in 4259 days

#8 posted 03-26-2013 08:21 PM

Yet another great LJ idea to implement! I am much better at collecting these great ideas than I am at getting them implemented – even being fully retired. Thanks for your inspiration.

-- Chuck near Nashville - “All you are unable to give possesses you” (Andre Gide)

View SRRieman's profile


65 posts in 2670 days

#9 posted 03-26-2013 09:03 PM

Thanks for the responses guys

For some of the questions, yes it is a HF 5 speed press flipped on its, well upside down actually.

I have it set at 1725 right now, but keep in mind I’ve only sharpened one chisel so far and that was one that was nowhere near flat out of the packaging. I can reduce the speed later on to 650, right around where the worksharp is set at, when I’ve upgraded to some higher quality chisels. But even at the speed I’m at now, heat wasn’t much of an issue.

Thelt – I’ll take some more pics in a little bit of the construction – but it is incredibly simple. The hardest part was making sure the base and discs were coplaner and that everything would stay put once it was running. Even that only took me an hour or so.

Mitchman – I would think 3000 is way too fast for honing. Grinding sure but not honing. Far too much heat would be generated. It would work but your tools would take an awful lot of abuse going through that.

My next step is to see what I can do with one of those crappy HF plane irons and some homemade scraper planes – probably based off of Mafe’s japanese styled scraper plane. That guy is awesome, so I’ll see what I can mimic.

-- Scott Rieman

View MitchMan's profile


75 posts in 2833 days

#10 posted 03-26-2013 11:39 PM

Thanks for the details. Keep us posted on how this is working out!

View MitchMan's profile


75 posts in 2833 days

#11 posted 03-27-2013 12:03 AM

As I’m looking into this, it seems to me that you could also build one of these on a $40 Harbor Freight polisher. Shaped like an angle grinder, you could mount it into a box like this. And have nice variable RPM control,

View SRRieman's profile


65 posts in 2670 days

#12 posted 03-27-2013 12:16 AM

Mitch Man, I think your dead on. Actually, I originally planned on something similar only using a random orbiral polisher that I never used for anything. The action on it varied way too much though because they are designed to flex at the edges. Most polishers are…but I think a grinder would work. Or maybe you could find a polisher that wouldn’t flex like mine did. It wasn’t the pad either, it was the arbor itself, and like I said it was designed to do just that, nothing was wrong with it.

-- Scott Rieman

View SRRieman's profile


65 posts in 2670 days

#13 posted 03-27-2013 12:17 AM

One other thing, if you could do the polisher/grinder, it would be much lighter than what I have, that’s for sure.

-- Scott Rieman

View MitchMan's profile


75 posts in 2833 days

#14 posted 03-27-2013 01:18 AM

Looks like maybe this polisher from Harbor Freight would be a candidate—

Curious about the arbor flex you mentioned though. This isn’t random orbital, so is the arbor rigid, I wonder? I’ve never used a polisher.

At first I was wondering about using my angle grinder, but way too many RPMs!! (and not variable.)

View MitchMan's profile


75 posts in 2833 days

#15 posted 03-27-2013 01:20 AM

By the way, the smaller HF bench grinders also look like they’re one speed, high RPM. (and of course lousy torque)

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