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Jet 6" JJ6 Jointer #3: hunt for the knife set screws

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Blog entry by Camper posted 10-06-2010 10:06 PM 1773 reads 0 times favorited 5 comments Add to Favorites Watch
« Part 2: frankenjointer... Part 3 of Jet 6" JJ6 Jointer series Part 4: two steps forward one step back »

well I was finally able to find a screw with matching thread in one of the box stores but this time the head size is the problem. Its about 1/8” bigger than the original screws. Here are some pictures showing it on the gib. they are just too big and protruding from the edge of the gib which will likely interfere with the cutting. It seems like just grinding the length down does not seem to be an option :(. At least we now know what will probably not work…

here is a shot of both screws on the gib

the original from the back

the not so matching replacement

-- Tampa-FL



5 comments so far

View Lee Barker's profile

Lee Barker

2169 posts in 1537 days


#1 posted 10-06-2010 10:41 PM

You’re right—now we know what won’t work! And no amount of duct tape or WD-40 will change that.

But there’s hope!

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View HokieMojo's profile

HokieMojo

2103 posts in 2415 days


#2 posted 10-06-2010 11:14 PM

i don’t have a great idea for a source, but there has to be someplace online that caries unusual sized hardware. shipping on a single screw can’t be that bad either I’d hope.

View Howie's profile

Howie

2656 posts in 1610 days


#3 posted 10-07-2010 12:18 AM

Hey Camper, try McFeely’s.Com see if they have anything.

-- Life is good.

View Camper's profile

Camper

232 posts in 1543 days


#4 posted 10-07-2010 01:48 AM

no go on Mcfeely’s Howie, neither do mcmaster carr or grainger carry that size.

Hokie, I am open to suggestions, couple of places carry the screws for the new jet jointers (coincidentally jet is out of stock, ereplacement parts says 1-2 weeks to ship and I think mike’s tools has them in stock.)....worst case I will order those and try them if someone can match the thread size over the phone.

-- Tampa-FL

View dlmckirdy's profile

dlmckirdy

195 posts in 1820 days


#5 posted 10-07-2010 03:03 AM

Camper,

Have you considered also the grade of the fastener. How much shear/tension will the fastener need to withstand? I see you have found a Grade 5 bolt. Although this is better than a “common” (ungraded) bolt, it is not made for great shear/tension. A Grade 8 fastener would probably be safer, though harder to machine down to size, if needed.

Since the hex head is too large, you might consider a philister head, with an Allen or Torx type socket in the head, or a 12 point head. Possible even another type of machine screw head (Phillips, Slotted, Torx, 12 point, etc.). You might try a machinery repair/parts house. They might even have the correct length. Try http://www.specialty-fasteners.com/.

Good luck,

-- Doug, Bakersfield, CA - I measured twice, cut it twice, and it is still too short!

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