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Forum topic by PatrickN posted 01-20-2014 12:41 AM 535 views 0 times favorited 12 replies Add to Favorites Watch
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PatrickN

6 posts in 242 days


01-20-2014 12:41 AM

Hi all,
I’ve got an older Craftsman planer (model # 351.23383) in need of at least one new drive gear. Originally the planer came with two sets, one 21t and 40t (slower) for running molding and one 30t/31t for regular planning. I got the planer used and have never had the “faster” gear set. Recently the small 21T gear bit the dust and I tried to find a replacement. Searspartsdirect is usually pretty good for this kind of thing, but of course the gear I needed has been discontinued:
http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Planer-Parts/Model-35123383/0247/0734000/10033905/00001?blt=06&prst=&shdMod=

The diagram shows the slow gear set (the 21 and 40t gears) but these part numbers actually refer to the faster gear set. I thought I was ordering the 21t gear but ended up with the 30t gear. In other words, I now have a working 30t gear and 40t gear and am looking for one or both of their mates- the 21t and 31t.

Anyone know an alternate site for purchasing gears that will do the trick? I assumed they were generic enough that I’d have no trouble but I’m coming up empty.

Many thanks,
Patrick


12 replies so far

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JustJoe

1554 posts in 692 days


#1 posted 01-20-2014 12:50 AM

That’s one of Sear’s crappier diagrams. I’m guessing the blobs at 61ish are the gears? Are the gears plastic or metal? Got a pic?
Boston Gear might have something.

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PatrickN

6 posts in 242 days


#2 posted 01-20-2014 02:02 AM

Despite their huge catalog I couldn’t find anything at Boston Gear. Thanks for the tip, though. Who knows why these seem to be oddball gears.
The gears are metal, have 3/8” bore, and 32 d.p. They have a keyway and no set screw. A 21 tooth gear would put me back in business, but if I can find them I’d like to replace the 40 and would be interested in the 30 and 31 teeth gears, too.
Frustrating as it seems like they should be easy to find. Shows what I know.
Thanks,
Patrick

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Julian

509 posts in 1344 days


#3 posted 01-20-2014 02:07 AM

Have you tried McMaster-Carr?

-- Julian

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JustJoe

1554 posts in 692 days


#4 posted 01-20-2014 02:27 AM

If you’ve got the rest of the specs then you can have these guys take one that’s close and customize it for you:
http://www.rushgears.com/Tech_Tools/PartSearch8/partSearch.php?gearType=SPUR

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PatrickN

6 posts in 242 days


#5 posted 01-20-2014 12:42 PM

Yes, I tried McMaster-Carr and it was the first time they’ve ever let me down!
I saw the rushgears site while looking around and discounted them because I assumed a custom milled gear wouldn’t be affordable. It’s starting to look like my only option!
Thanks guys,
Patrick

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JustJoe

1554 posts in 692 days


#6 posted 01-20-2014 05:07 PM

If it’s metal and you post a pic with the rest of the measurements – width/diameter etc. I will dig through my box of spare parts. If it’s not metal, don’t bother because that’s all I’ve got.

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Grandpa

3133 posts in 1329 days


#7 posted 01-20-2014 06:19 PM

http://www.bing.com/images/search?q=Old+Sears+Parts&qpvt=Old+Sears+Parts&FORM=IGRE

eReplacement might be a source also. Just go out there and search. Thee used to be a man in California that bought all the replacement parts from Sears when they discontinued product lines. When I called he told me unfortunately he had all the parts to build my drill except for the part I needed. It was the gear that ALWAYS broke. Well we tried.

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PatrickN

6 posts in 242 days


#8 posted 01-20-2014 10:18 PM

Hi Joe,
Thanks for the offer. And I was mistaken about the dp- it’s 24, not 32. With that new info I’ve been able to find a few similar gears online, but nothing with a keyway. Here are the full specs of what I’m looking for:

21 teeth, 24 d.p. Center bore is 3/8” or 0.375”. Overall diameter is 0.958”. (The “pitch diameter” would be 0.875”.) No hub; gear has a keyway.

Here’s a picture of the bad gear:

Thanks,
Patrick

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JustJoe

1554 posts in 692 days


#9 posted 01-21-2014 12:14 AM

Nope, sorry – nothing even close. You might have to special order, or order a similar one without a keyway and either grind one out yourself with a dremel, or just put a want-ad on craigslist for someone with a broach to cut it out for you.

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PatrickN

6 posts in 242 days


#10 posted 01-29-2014 10:11 PM

Bumping this back up-

An update. Well, I ordered the replacement 21 tooth gear but found that the tooth style was ever so slightly different than the existing mate. So I ordered a new mate with the same specs as the 21 tooth gear I bought. You guessed it- the two don’t fit when placed on the posts.
It seems I have the specs for the original gears is slightly off. Anyone know of any reliable way to find the original specs? I have one original gear in decent shape, but the other is mangled. Can’t find any contact info for someone at Craftsman- does anyone know who I might email? No info in the original manual.
Thanks,
Patrick

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PatrickN

6 posts in 242 days


#11 posted 01-29-2014 11:00 PM

Addendum:
Good grief, it looks like these could be metric. Using some online calculators and measuring the two “good” gears I get DPs of 26.02 and 25.6- both a ways off from 24. But run the numbers in metric and I get .978 and .992 MOD- durn close to a standard 1.0 MOD gear.
Looking for some reassurance before I shell out for even more useless gears…
Thanks,
Patrick

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Knothead62

2364 posts in 1615 days


#12 posted 01-29-2014 11:32 PM

No parts???? That’s Sears for you! If you knew who made the planer for Sears, you might be able to match up the parts with the OEM parts. But….........don’t count on it.

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