Torque specs...

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JOHNSON
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Re: Torque specs...

#16

Post by JOHNSON » Wed Mar 07, 2012 3:30 pm

torque specs,unless noted for lube,is dry.if it says 100 foot pounds,and nothing else,it means dry,let me tell you what a KAR PRODUCTS CHART SAYS"3/8-16 BOLT,SAE GRADE 5,DRY 30 FOOT POUNDS,LUBE THE THREADS,19 FOOT POUNDS.THAT MUCH DIFFERENT.you will a different reading wet.you see a lot of bolt failers do to this.if it says 100 foot pounds,and that's it,35 years as a heavy equipment mechanic,i've been around the dry ,wet,even a torque specs for lock- tit,neverseeze to.......Johnson



Cotten
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Re: Torque specs...

#17

Post by Cotten » Wed Mar 07, 2012 3:59 pm

Johnson!

That is quite a difference!

However, please consider that parkerized hardware must be oiled. The whole point of the coating is to hold oil.

Cadmium plating is "self-lubricating" in itself.

So in practice, all fresh fasteners must be considered lubed to a degree.
The only truly dry assemblies would be hardware that had its coating removed in some way. At that point, adding lube becomes prudent to prevent corrosion.

Stainless requires a lube to avoid galling;
Chrome depends entirely upon the source.
Zinc may suffer a dry assembly quite well, if you are in to zinc...
But otherwise, we must consider nearly all assemblies to not be "dry".

Or at least they shouldn't be.

....Cotten

JOHNSON
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Re: Torque specs...

#18

Post by JOHNSON » Wed Mar 07, 2012 5:44 pm

COTTEN,when i'd use oil on the bolts and nuts,i use the lower torque,but if i remember in the shop manuals,very tight is the spec.to me ,just a half turn before it break s works for me..........................with respect............johnson ........also go by the manufacturers requirements

Cotten
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Re: Torque specs...

#19

Post by Cotten » Wed Mar 07, 2012 7:06 pm

JOHNSON wrote: ....,just a half turn before it break s works for me....
Like this, JOHNSON?
STRETCH.jpg
....Cotten
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JOHNSON
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Re: Torque specs...

#20

Post by JOHNSON » Wed Mar 07, 2012 9:54 pm

cotten,what ya have is a 3 phase bolt,American,metric,British whitworth threads.it's amazing what over torque will do,in my field,you see it a lot.and a lot more if your a swede like me.thats what torque wrenches where design for us swedes.......................WITH RESPECT..............JOHNSON

HD48FL
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Re: Torque specs...

#21

Post by HD48FL » Wed Mar 07, 2012 10:47 pm

Cotten wrote:
However, please consider that parkerized hardware must be oiled. The whole point of the coating is to hold oil.

But otherwise, we must consider nearly all assemblies to not be "dry".

Or at least they shouldn't be.

....Cotten
Cotten: What kind of oil and how much? This is all new to me and I want to do this right the first time. I'm not going to use loctite, but never considered oil for parkerized hardware.

Cotten
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Re: Torque specs...

#22

Post by Cotten » Wed Mar 07, 2012 11:05 pm

HD48FL!

ANY kind of fossil oil, (or petroleum grease, or even petrolatum),..
and a skosh too much is just enough.

The whole point of Parker's Pickle was that it chemically bonded a coating, that chemically bonds with petroleum oils.

The reason roller cages, and even many cylinders were Park'd was to provide lube for dry start-ups within motors.

Exposed hardware requires manual maintenance, but oil usually finds it naturally. The greatest threat is anal-retentive pressure-washing.

Loctite has great usefullness, where appropriate,..
if nothing else,.. as a thread lube!

....Cotten

HD48FL
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Re: Torque specs...

#23

Post by HD48FL » Wed Mar 07, 2012 11:29 pm

Cotten wrote:HD48FL!

ANY kind of fossil oil, (or petroleum grease, or even petrolatum),..
and a skosh too much is just enough.

The whole point of Parker's Pickle was that it chemically bonded a coating, that chemically bonds with petroleum oils.

The reason roller cages, and even many cylinders were Park'd was to provide lube for dry start-ups within motors.

Exposed hardware requires manual maintenance, but oil usually finds it naturally. The greatest threat is anal-retentive pressure-washing.

Loctite has great usefullness, where appropriate,..
if nothing else,.. as a thread lube!

....Cotten
A little bit of oil it is, thanks Cotten.

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