Astro Tools Exhaust Stretcher Kit Part 2 - Will The Milwaukee 2767 Impact Wrench Have Enough Power?

[@canuckfixit7722]

This was actually fun to watch, suspenseful music et al. The problem here is due to the metallurgical properties of the stainless steel. It has a higher Young's modulus (of elasticity) than mild steel and also a higher yield point on a stress/strain chart. That means that there's more "spring" in the SS than MS so you're working against the properties of the SS. To successfully expand the SS pipe, you have to stretch the pipe to a point *past* the required diameter and that's probably going to take 10x more tool strength than you have there. Thanks for the demonstration; I really thought that the bolt would strip out.

[@ChallengeTheBuild]

Awesome, glad you enjoyed it... I appreciate you watching and commenting....👍 Thank you

[@Roncy571]

Milwaukee is the best imo. Great review 👏

[@ChallengeTheBuild]

I used a lot of Milwaukee back in my construction days and would like to start collecting the M12 line of tools again! I love my Makita tools but also love the M12 Line...Definitely top notch stuff, thanks for watching and feedback 👍!

[@joakim123451]

Good video to watch after i bought one myself. According to what i learned at university about the strength of materials, trying to expand a pipe so close to the bend would require a lot of energy as the tensile strength material is different because of the bend as well as the energy being excreted trying to expand the pipe is dissipated in weird way. As i have no idea if the wall thickness at the bend is the same as the rest of the pipe due to the fact that i don't know if it was mandrel bent to made that way , i will have to assume that it is the same thickness. Ill try to calculate or simulate the energy needed to expand it 0.5'' total.

[@ChallengeTheBuild]

I appreciate the watch and comment.. The amount of energy needed is HUGE! 👍💪

[@oby-1607]

I have to wonder if the aluminum pieces are too soft and absorbing energy and if they were steel it would work better. Aluminum vs stainless is a tough match. I have the same Milwaukee impact gun and it hasn't met its match yet.

[@ChallengeTheBuild]

This is a great point, never really thought about it but I am sure they absorb atleast a little bit of energy... And yes I don't know how I survived without my Milwaukee 2767 😂...

[@grosom31]

I'm pretty sure you were holding the expander from doing what it was supposed to do by the vice it looks like it's over the expander inside the pipe.

[@ChallengeTheBuild]

It's possible the vice was limiting the expander a little bit.. 🤷‍♂️

[@JohnDoe-mx1sq]

There are pneumatic kits now. Thinking that is the way to go.

[@ChallengeTheBuild]

I will have to take a look...👍

[@mrnonpc9885]

I watched most of the video, but the one thing I didn’t see you try is heating the pipe first. A butane torch might have made the job easier.

[@ChallengeTheBuild]

So the reason I didn't use any other methods in this video is I wanted to see what it would actually take to expand the stainless pipe using just an impact driver. I'm sure if heat was introduced it would have made things a little easier... It was a difficult piece of pipe..😂😂More difficult then I thought it would be, I was kind of surprised with the entire process ...

[@pl5624]

The rubber rings would melt

[@GrowGoddessMI]

I believe a pneumatic, over 1,000 fp impact would have done the job.

[@ChallengeTheBuild]

Its very possible.. It really took a lot to stretch it...

[@arnoldwilson3719]

i think ss might split.

[@ChallengeTheBuild]

It's always possible... I feel like the stretcher would break first in this scenario...🤷‍♂️👍

[@sweetybean1]

Stainless looks really tough.

[@ChallengeTheBuild]

It definitely is. I wasn't really surprised that the Bauer wasn't up to it but I went into it with high expectations with the Milwaukee and still was surprised.. I guess I need the MONSTER 3/4" Impact! 😂😂😂

[@grosom31]

That impact can put out 1800ft lbs no way are you grenading that stretching some pipe.

[@ChallengeTheBuild]

Thats the 2767 - 1/2"drive version (1400ft lbs take off torque) probably not gonna do much damage ...

[@GrowGoddessMI]

@@ChallengeTheBuild Take off torque?