Homemade slip roll.

Hackaday story about the build:
https://hackaday.com/2019/03/12/adiy...

Just the video:
   • Simple Homemade Slip Rollers (Heavy d...  

Steel Parts List:
1X 10 inch C Channel 65 inches long
2x 1.5 inch Schedule 80 pipe 68 inches long
1x 1.5 inch Schedule 80 pipe about 60.25 inches long (will vary with the distance between the towers)
4X 7.5 inch by 10 inch ¼ inch steel plate
2X 2.5 inch by 10 inch ¼ inch steel plate for tower base
2X 2.5 inch by 7 inch ¼ inch steel plate for top plate
4X 2.5 inch by 1.5 inch ¼ inch steel plate for top plate attach points
2X 2 inch by 8 inch ¼ inch flat bar to use as spacers under Tee fittings
12i long piece of steel that can be turned down to two inches OD for joining pieces and tower adjusters

Parts from Surpluscenter.com:
One 1108625 Offset Link
One 1108725 Connecting Link
One 14345 25 Pitch 4 Foot Roller Chain Loop
Two 1274235F 35 Tooth 3/4" Bore 25 Pitch Roller Chain Sprocket 25BS353/4

Parts from Easyfit.com:

6X EF03G40 11/2” IPS SHORT TEEGALV
6X EF30G40 11/2” IPS COLLARGALV

Hardware

4X 1/2in by 4in long bolt for attaching Tee fittings to C channel
8X 3/8in by 1 1/2in long bolt for attaching towers to C channel
8X 5/16in by 1 1/4in long bolt for attaching top plate to tower
2X 5/16in by 1in long bolt for raising/lowering center tube (tapped and inserted in the allthread)
2X small roll pin
2X 4 ¼ long piece of 3/4in allthread
2X 3/4in nut to weld to top plate
(nuts and washers for hardware as needed)
2X junk or expendable 1/4in socket to weld to allthread