Torque wrench - How important for routine nozzle replacement?
 

Torque wrench - How important for routine nozzle replacement?  

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jsw
 jsw
(@jsw)
Reputable Member

One of the recently-cited items showed the installation (and removal) of I3 nozzles using a torque wrench at 2-3 Nm.  Other items (and videos) show removal/replacement using a standard small 'breaker bar' socket handle, or even an open-end or box wrench.

I do 'get it', as there are many tales of woe from haphazard nozzle removal/replacement.

How important is using a torque wrench? Do those of you who change nozzles often use them? For those who don't use them, how confident are you of a good nozzle installation each time?

Thanks

Posted : 19/05/2020 10:08 pm
joan.t
(@joantabb)
Veteran Member Moderator

If you are careful and gentle there is no need for a torque wrench, 

If you have the manual dexterity of a gorrilla on weed... then it might help! 

there are a number of designs for print your own nozzle torque wrenches

https://www.yeggi.com/q/nozzle+torque+wrench/

you might just print one

or search ebay for 

Metal Cross Socket Wrench - 7mm, 5.5mm, 5mm, 4mm. Wheel Wrench for RC Car
the arms are so short that most people would be unable to overtorque the nozzle using one of these

regards Joan

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 19/05/2020 10:35 pm
bobstro
(@bobstro)
Illustrious Member

I just use "thumb and finger" and am conscious of over-tightening. Never broke a heatbreak in 2 years. I did have a heater block strip, but I'm regularly swapping nozzles at 285C so consider that normal wear and tear. Copper replacement is about a year old now. 

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 19/05/2020 10:38 pm
Karl Herbert
(@karl-herbert)
Famed Member
Posted by: @jsw

One of the recently-cited items showed the installation (and removal) of I3 nozzles using a torque wrench at 2-3 Nm.  Other items (and videos) show removal/replacement using a standard small 'breaker bar' socket handle, or even an open-end or box wrench.

I do 'get it', as there are many tales of woe from haphazard nozzle removal/replacement.

How important is using a torque wrench? Do those of you who change nozzles often use them? For those who don't use them, how confident are you of a good nozzle installation each time?

Thanks

I build my own torque wrench and block holder:

As a mechanic, i generally use a torque wrench. For the E3D equipment this is set to 3 NM. Of course there are many other ways to fix the nozzle. You have to find the right one for you. In addition, i also use some ceramic paste for the threads, but need not be.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 19/05/2020 11:32 pm
jsw
 jsw
(@jsw)
Reputable Member

Thanks to all, and to Joan in particular.

I downloaded the knurled housing and the older insert from the link above.  I'm assuming that PETG is a good filament to print this with.  It looks like this will "ballpark" the correct torque, as the recommended 1-2 N-m is (at 2:1) very much a "ballpark" recommendation.  😉  It looks like this will take a very standard 7mm deep-well socket.

I haven't had to change a nozzle yet, but I'm feeling more confident about doing so when I need to.  I did order a few to try out as I continue to climb the learning curve with this thing.

Posted : 20/05/2020 12:39 pm
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