Craftsman Block Grinder Wet Sharpening Attachment 335.6610

[oldironowner]

Looking for information on this Craftsman Block Grinder Wet Sharpening & Honing attachment. I purchased one and the small gear that drives the unit has disintegrated into a million pieces upon arrival. I am hoping someone may have one that is in service. I need some dimensions on the gear and its tooth count to remake it. I would even provide one to whoever may have one they can take apart to measure and photograph. Has anyone ever seen one of these in operation?

83EBC82F-CDA5-49D3-A660-451415690BE4 by J Brauer, on Flickr

06E7DA33-0C77-4AF9-9EF1-D85FD4642A3E by J Brauer, on Flickr

502B086E-3E61-419A-AE60-B73D86863920 by J Brauer, on Flickr

1F48E95A-4FD3-4D4A-8BE4-6FB3D8D84211 by J Brauer, on Flickr

470004A0-0510-40A0-BF6B-02DACDE12BDB by J Brauer, on Flickr

 

[whateg01]

Looks simple enough to make, either by buying a gear from a place like Boston or by cutting a gear from scratch. You can get the pitch and PA from the mating gear and should be able to measure the center of one to the other to determine the number of teeth, if you can't reassemble it week enough to tell.

 

[larry4406]

My googlefu is not very strong, but I did find an Ebay listing of one just like yours with a broken gear as well. From that listing, it shows the broken gear appears to be a small pinion that rides inside a large ring gear. Oddly, this listing has a picture of a stained manual that looks just like your stained manual.

Craftsman USA Wet Sharp Machine Sharpener Grinder Knife Hone Stone 335.6610 | eBay

<p>Craftsman USA Wet Sharp Machine Sharpener Grinder Knife Hone Stone 335.6610. </p><p>This appears to have never been used. Maybe missing parts. The gear on the inside is broken. See pictures from where he tells</p>

www.ebay.com

 

[Caveman613]

"My googlefu is not very strong" .....I sure wouldn't say that LOL

 

[Caveman613]

Oddly, this listing has a picture of a stained manual that looks just like your stained manual.

It IS the same LMAO...... that's good!

 

[oldironowner]

It IS the same LMAO...... that's good!

Yeah only other one I have ever seen. I don’t have the manual myself.

 

[oldironowner]

The opposite side of this attachment has a set of pulleys. One side measures .600" and the other measures 3.5".
616314F0-7856-4B33-BCBF-1D3FB9F7ECD1 by J Brauer, on Flickr

The small pulley is the driven pulley which is affixed to the grinder arbor. Which is coupled with an o-ring as a belt per say.
6A5B6370-B74D-4EF0-9607-8E7391A708FA by J Brauer, on Flickr

B1F3D62D-6638-4A8B-8581-EFE54CC0EBF1 by J Brauer, on Flickr

With the help of a friend. Worked out the math.

The craftsman block grinder is 3,580 RPM.
The driven pulley measures .600"and the larger pulley measures 3.5".
The larger gear the grinding wheel attaches too has 88 teeth.

3580RPM * (0.6/3/5) = 615.70 RPM BEFORE THE GEARING.

615.70RPM * (?/88teeth) = 100 RPM (as mentioned as approx. RPM in Craftsman catalog)

? = 14 teeth

Plugging 14 into that equation gives me 97.95 RPM.

The large gear with 88 teeth has a pitch diameter of 7.33". Resulting in a 12 diametrical pitch gear.

So I will need to locate a 14 tooth, 12 DP gear. Machinable. End result was ordering this gear from Mc-Master Carr. I will then modify in my lathe by taking it to width and boring out the gear to press fit on 9/16 shaft.

501C45FB-894A-462A-96B3-213A5D00FE08 by J Brauer, on Flickr

 

[whateg01]

Glad you figured that out. Fwiw, the smaller pulley is the drive pulley. The driven pulley is the larger pulley that is driven by the drive pulley.

 

[oldironowner]

Glad you figured that out. Fwiw, the smaller pulley is the drive pulley. The driven pulley is the larger pulley that is driven by the drive pulley.

Thanks. Misspoke there between uploading and adding all the images.

 

[palashel]

Were you able to get the part, or make it? I have the same problem from a tool my father left me… Thanks.

 

[oldironowner]

Still working on it. My gear from Mc Master didn’t work. I believe it’s metric possibly. Hoping to finish it soon once I cut the blank.

 

[blhuff1]

Any chance you solved the size of the gear? I have one that grenaded as well

 

[oldironowner]

Any chance you solved the size of the gear? I have one that grenaded as well

I had one made at a gear shop. Off the shelf gear wasn’t available. It wasn’t cheap.

 

[blhuff1]

Thank you very much for your quick response. I was wondering if you got any written information about the gear from the machinist? In other words did he write down dimensions. I have access to a machinist that could make one, but I don’t know the information about the gear

 

[Cruzan80]

Post #7 has dimensions and info about the gear (bottom of post).

 

[blhuff1]

Hi, thanks so much for your help. I found a drawing. I believe it’s the one that you’re referring to. I just wanna make sure.

 

[oldironowner]

Hi, thanks so much for your help. I found a drawing. I believe it’s the one that you’re referring to. I just wanna make sure.

This gear was not correct or well even close. I’ll contact them and see if they would make another and the cost.

 

[blhuff1]

Thanks I appreciate your time.