cutoff wheel on ARP bolt.....to much heat?

[WATERWINGS]

I had to trim a little length off of the new ARP bolt that I got this weekend, and I used a cutoff wheel.....

Is there any chance that the heat generated from the cutoff wheel would weaken the bolt at all ?

It never got red, of coarse, but it got to hot to hold after the cut was finished....

[Old_Skool]

I wouldn't worry about it.

[njj502]

Depends on what the bolt was for I suppose...

[WATERWINGS]

OH...sorry this is the tiller arm bolt.....?

[Euroski]

John, I know they make that bolt in 2 different length of which I think they are 1-1/4 and 1- 3/8. If you had the longer one what was the part number and where did you get it? Mines on the second year and would like to change it after this season.

thanks

[WATERWINGS]

There were three different lengths, I think.....?...I can give you the number of the one that I cut off...its on the package at the house.....


This one came from my local Merc dealer.....I wonder if we can get Lynn, (Capt.Insane-O) to send us some...?

[outasite]

For you guys that are looking for steering arm bolts, if you measure the grip and the thread lenght,you can get them at aircraft spruce inc.Very affordable, and aircraft grade (for holding wings on) These are on par with arp at a quarter the cost.

[CharlieN]

I had to trim a little length off of the new ARP bolt that I got this weekend, and I used a cutoff wheel.....

Is there any chance that the heat generated from the cutoff wheel would weaken the bolt at all ?

It never got red, of coarse, but it got to hot to hold after the cut was finished....

The area you cut could possibly be affected by heat, but heat at the tip of the fastener is nowhere near the section of the bolt that matters. As long as the heat does not travel down the threaded area into the shank than no harm could be done. And in the 30 seconds it would take to cut the bolt and dress the threads would not get the bolt hot enough to matter, except to your fingers.

[Dave Strong]

I was told altering specialy treated or hardened bolts, studs was a No No, not sure on the exact reason but had something to do with even cutting a hardened bolt changes its strenth properties. Maybe someone like a metalergist (sp) can say exatly how come. Was told this by more than person.


Dave

[CharlieN]

I was told altering specialy treated or hardened bolts, studs was a No No, not sure on the exact reason but had something to do with even cutting a hardened bolt changes its strenth properties. Maybe someone like a metalergist (sp) can say exatly how come. Was told this by more than person.
Dave

That is very true, the metal in the heat affected zone is altered, but as long as that zone is outboard of the nut then it does not affect anything.

[TEXAS20225]

if you have a bolt that is 11/2 long and you cut it off with a abrasive cut off wheel why would you expect it to not be hot on both ends maybe a little hotter on one end then the other but Geez?

[flabum1017]

if you have a bolt that is 11/2 long and you cut it off with a abrasive cut off wheel why would you expect it to not be hot on both ends maybe a little hotter on one end then the other but Geez? the heat at the cut would be much hotter than at the other end. Even so, cutting the bolt would not create enough heat to affect the area where the shear load will be. The only area that might be affected is that where the bolt protrudes through the nut and there is zero load there.

[njj502]

Think of the heat load wicking up the bolt. It will to some degree since the outside has heat sinks (threads). As it wicks it alters the grain structure in the center of the bolt. You should never alter a specialty fastener like a hardened bolt as it changes the properties and how the elements play with each other. With all that said will it be ok, yeah probably....would I use it?? probably not

[CharlieN]

Think of the heat load wicking up the bolt. It will to some degree since the outside has heat sinks (threads). As it wicks it alters the grain structure in the center of the bolt. You should never alter a specialty fastener like a hardened bolt as it changes the properties and how the elements play with each other. With all that said will it be ok, yeah probably....would I use it?? probably not

Actually it is the outer section of the bolt that is affected the most. And with a 3/8 bolt the affected area will travel about 0.030", that is about ½ a thread. I use an ESNA nut on the steering and in this case you should have 1½ threads protruding from the nut. So if the bolt is weakened even as much as one full thread, it will be just barely into the nylon part of the nut. That is far from a safety issue.
To me the biggest concern is the end of the bolt will be rusting. At some later time that rusted section needs to be withdrawn through the steering arm.

[Dave Strong]

Think of the heat load wicking up the bolt. It will to some degree since the outside has heat sinks (threads). As it wicks it alters the grain structure in the center of the bolt. You should never alter a specialty fastener like a hardened bolt as it changes the properties and how the elements play with each other. With all that said will it be ok, yeah probably....would I use it?? probably not

Kinda how it was explained to me at one time, my policy is not to alter specialty fasteners and if done they are not to be used as if they were the original strength.

Dave

[Chaz]

http://smileys.on-my-web.com/repository/Thinking/searching-019.gif http://smileys.on-my-web.com/repository/Thinking/idea-013.gif http://smileys.on-my-web.com/repository/Thinking/idea-007.gif

[HStream1]

Chaz nailed it!!!

If my memory serves me correctly those bolts are 422 stainless steel. That grade SS in the heat treated form will withstand temperatures up to 1200* without affecting the creep-rupture properties. And that cut off wheel didn't even get close to generating that kind of temperature.

John you have access to a machine shop and I'm sure they have a portable Rockwell pinger for small parts. If you don't feel comfortable have one of your QC guys ping it in a few places.

[WATERWINGS]

Sadly, we don't have a hardness tester here....

[HStream1]

WHAT!!!:eek: No hardness tester in a machine shop :nonod:.

Regardless that grade of stainless would have to be heated to 1600* and slowly cooled in a controled environment to affect it's as hardened mechanical properties.

And I can guarantee you without doubt, that cut off wheel never came close to generating 4 didget temperatures.

[pointer]

Just a thought - if your concerned about it replace it. Your gonna think about it every time you get into the throttle.
Having it fail under load puts you and your passengers at risk

Just my thoughts,
pointer

[WATERWINGS]

WHAT!!!:eek: No hardness tester in a machine shop :nonod:.

Yea...well, we don't make small parts that go in machines....we repair and rebuild large pump casings, impellers, feeder screws, coal lump breakers and such....Most of the shafts we use now, are farmed out to companies that specialize in that.....

We DO have computerized surface finsish testers though.....I think we go to the community college if we have a special part that needs testing....which is rare.