To help making tube to form straight T or according to the desired angle of T, I have done another online tool to generate paper template. Previously I made this instructable to make angle tube cut.
In the middle of the page, url here under, you will have to enter :
- diameter of main tube in millimeter
- diameter of the inserted tube
- angle in degree of insertion
Before printing the pdf be sure that the document will not be scaled by your computer, you would loose the correct dimensions.
Step 1: Cut Template and Apply
The pattern cut after printing is placed around the tube with a tape.
Step 2: Marking
I mark in black the trace on the tube "receiver" by plating the inserted tube.
And let's go for the cutting, I made a test with a metal tube of 42mm and another of 20mm. My handling of the grinder did not make it possible to make something super clean, hence my illustration with cardboard rolls.
Step 3: Cut
As said above we can make T from tubes of different or equal diameters. For small tubes cutting is difficult but the next time I need a T with PVC pipes I think it will help me out.
Hoping this will be helpfull.