Mazda Rotary Flywheel Nut..

Rupunzell

Rupunzell

Bernice Loui
How to deal with applying 300 ft/lb to this nut..

[ame="http://www.youtube.com/watch?v=twfutkuf7ho&feature=c4-overview&list=UUwh_UaR9_fgy97tZynvKs-w"]Mazda Rotary Flywheel Nut Installion - YouTube[/ame]

This was part of the first rotary I put together..


Bernice
 
They are basically a reduction gear system. This is how large fasteners are torqued to the required amount. Once a threaded fastener exceeds 3/4" or 19mm, hand wrenching is simply not a good solution. Impact tools do not have enough precision and for many applications, they cannot produce enough torque. In the world of big machines, torque multipliers are very, very common.

[ame="http://www.youtube.com/watch?v=kwBcbVqN-ig"]Torque Multiplier - YouTube[/ame]


Bernice


budgetzagato said:
OK, so how does the torque multiplier work? :dunce:
Click to expand...
 
Another common method to tensioning big threaded fasteners, the hydraulic tensioner:
[ame="http://www.youtube.com/watch?v=ef9CXDhzH-U"]How Bolt Tensioners Work - Tentec - YouTube[/ame]

This is also a good illustration of how bolted joints works.


Bernice
 
Very Interesting...

So this eliminates the problem of guessing at actual bolt stretch vs. friction on the nut which is more or less what a normal torque wrench involves. Does the tension created when the appliance is removed from the nut leave the nut and bolt threads in interference enough to prevent loosening. It seems like it would.
 
it is quite common

method to torque flange bolts in large 36" plus, pipeline flanges in ANSI 600 or ANSI 900 rating.
 
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