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Gripe about bolts

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Coloken

07-28-2007 13:06:10

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Now they thread short bolts all the way to the head. Like if I want to bolt two half inch bars together with a one and half inch bolt, the threads are in the bar holes and they wobble around.

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Wild Bill

07-30-2007 19:53:13

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

My gripe about bolts is that I can never find "Exactly" what I need. I have to settle for too long, too short, and make it work...etc.

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buickanddeere

07-29-2007 22:02:49

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

Shops that specialize in aircraft bolts can supply what you need. Even bolts with the smooth shank portion a few thou oversize from standard bolts. We don't want airplanes shaking apart either.

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Coloken

07-29-2007 05:30:47

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thankss in reply to Coloken, 07-28-2007 13:06:10

Got a couple of ideas from you fellows. Body fit bolts may be hard to find, But never though of cap screws. The project it to add a 3 point to an Allis WD and I want the hardest and tight fitting bolts where I bolt the adaptor to the drawbar. Don't want it to wiggle.

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Tim Casbolt

07-29-2007 04:53:41

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

For situations where I need an unthreaded bearing surface, I"ll use a much longer bolt with the desired area and cut off the excess threads.

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TominKy

07-29-2007 04:53:11

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

Ken; There are two kinds of bolts, Machine bolts( where the threads go all the way to the to of bolt), and cap screws ( where the first third of the bolt is unthreaded shank), and both kinds are available at the hardware stores where I shop. Machine bolts are generally used where the material to be joined is thin or where the maximum no. of threads are necessary to increase holding power. Cap screws are generaly used where the two materials to be joined is thicker and the bolts are selected so that the shank is only slightly shorter than the thickness of the outer material so no thread will be in the joining.

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Jim in Ma.

07-28-2007 18:36:42

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

??? How about using a lock washer

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Jiles

07-29-2007 10:35:28

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Re: Gripe about bolts in reply to Jim in Ma., 07-28-2007 18:36:42

The ONLY use I have for a lockwasher is when there is a gasket involved or a few other applications where the dolt or nut can"t be tightened to full torque. The lock washer breaks and you have a loose bolt or nut. How many lock washers have you seen inside an engine?

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Farmall MD

07-29-2007 11:51:45

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Re: Gripe about bolts in reply to Jiles, 07-29-2007 10:35:28

None, the only time I've seen them break is at removal when rusted. I've seen a few spread when tightening, but they were the cheap a$$ ones.

Not using a washer just gauls up the surface you are tightening to. Washers prevent that surface destruction. And also prevents the mushrooming of the material you are bolting too, causing bolts to be screwed out instead of pulled out when removing. How many times has that happened to you? My opinion, not using washers is bad news. It's fine to not use a washer on the bolt, but not the nut. Cause 9 times out of 10 you tighten the nut, not the bolt. Doug N

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Jiles

07-29-2007 19:23:18

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Re: Gripe about bolts in reply to Farmall MD, 07-29-2007 11:51:45

I'm sorry-- I thought we were talkind about LOCKWASHERS. I always use a flat washer when using a nut or bolt for the very reasion you mentioned. A lockwasher is designed to slow down the backing off of a nut or bolt if it becomes loose, that is when it breakes. If it is tightened correctly the lock washer will be of no benefit. If the bolt becomes loose, the damage is done if not corrected soon. I have worked in a large aluminum factory for 30 years and we NEVER use a lock washer unless application warrents.

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Farmall MD

07-28-2007 14:56:15

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

Charles is right, depends on quality. Standard practices on bolts are:

Thread length= 2x diameter+1/4"(up to 6" long)
Thread length= 2xdiameter+1/2"(over 6" long)

So if you have a 1/2-13x 1-1/2 bolt, threads wil be 1-1/4" long.

"the threads are in the bar holes and they wobble around." You'll always have threads in the holes, or you'll bottom the threads out.

There will be threads up to the head on shorter bolts. Doug N

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Charles (in GA)

07-28-2007 13:31:43

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Re: Gripe about bolts in reply to Coloken, 07-28-2007 13:06:10

Depends on the quality of bolt. I find many bolts with shanks on them, yet, at the Home Depot, hardware store, etc. They are grade 5 and grade 8. If you get grade 2 bolts, they usually are all thread, and indeed they don't fit as well.

Charles

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old art

07-28-2007 17:44:56

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Re: Gripe about bolts in reply to Charles (in GA), 07-28-2007 13:31:43

if you want the bolt to fill the hole use a body fit bolt they out there.

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