Bending PETG tubing fail : HELP !

[Call_Me_Daddy]

Hi Guys !

 

 

I'm building my 1st watercooling loop in approximately a week.

Today, I recieved Two parts : PETG tubing and Thermaltake PETG tubing bending kit. I'm aware that this kit is not necessairly but I really wanted to own it in order to make proper angles and budget wasn't a matter.

 

So. I did a few tries : cutting was fine (no big deal).

 

However, when it came to bending, everything didn't go that well. I had a few watches at jayz bending video tutorials so I repeated :

Inserting the insert

heating with a heat gun at medium setting until the tube starts bending by low effort

Slowly bent it using the 90° guide

fack.

 

 

As you may see on the pictures :

1 - The tube went largely over 90°

2 - The tube kinda collapsed and pinched in the inside of the bending

 

 

Regarding 1- I can't figure out what went wrong as long as I have bent it following the guide. Any thoughts ? EDIT : While taking the pictures, I just realize that it may come from the tube collapsing (see 2-)

 

 

Regarding 2- I realized afterwards that my alphacool tubing is ID13mm OD16mm while the insert is only 12mm. It had some room inside the tube. May the bending come from this ? Should I own a 13mm insert instead ?

What are the other causes of tubes collapsing / pinching ? Mabe was it not hot enough ?

 

 

 

[Lurick]

4 minutes ago, Insorior said:

Regarding 2- I realized afterwards that my alphacool tubing is ID13mm OD16mm while the insert is only 12mm. It had some room inside the tube. May the bending come from this ? Should I own a 13mm insert instead ?

What are the other causes of tubes collapsing / pinching ? Mabe was it not hot enough ?

This is the problem, yes, you need a proper 13mm insert otherwise there isn't really anything you can do to stop the tube from collapsing a bit.

[wANKER]

As above. 

 

Quote

I realized afterwards that my alphacool tubing is ID13mm OD16mm while the insert is only 12mm. It had some room inside the tube. May the bending come from this ? Should I own a 13mm insert instead ?

When you're bending the tube, it's trying to fill that 1mm void at the bend - and it's succeeding. 

[Call_Me_Daddy]

35 minutes ago, wANKER said:

As above. 

 

When you're bending the tube, it's trying to fill that 1mm void at the bend - and it's succeeding. 

 

37 minutes ago, Lurick said:

This is the problem, yes, you need a proper 13mm insert otherwise there isn't really anything you can do to stop the tube from collapsing a bit.

 

Thank you two !

I just ordered a 30cm 13mm insert at amazon which will undoubtedly help

 

 

It is alphacool rubber insert. I see silicone inserts as well. Any thoughts ?

[Call_Me_Daddy]

Update : now we’re talking !

 

i’ll be bending those guys in 1 or 2 weeks I can’t wait doing so !

 

thanks again