I cut the plug out of the top of my RV fresh water holding tank to retrieve a scrap piece of tank left inside by the manufacturer. When I cut the hole I figured plugging it would be easy. It wasn't until after I cut the hole I discovered that polyethylene is not easily glued.
The only RV repair shop nearby (65 miles away) that would spin weld wanted over $100 for the repair. I did find a shop that would plastic weld but it was 140 miles away and unavailable at the time I need the repair. Plastic welding would have been my first choice if the service were more easily accessible.
At this point, I decided to attempt the spin welding repair myself.
Here are the tools and parts used in the video:
RecPro RV Tank Spin Weld Fitting 1 1/2" Flush Fitting (2 1/4" Hole Size)
- www.recpro.com/rv-tank-spin-weld-fitting-1-1-2-flush-fitting-2-1-4-hole-size/
Bauer 8 Amp 4-1/2 in. Trigger Grip Angle Grinder
- www.harborfreight.com/8-amp-4-12-in-trigger-grip-angle-grinder-64742.html
Century 5/8-11 Tap
- shop.advanceautoparts.com/p/century-drill-tool-tap-plug-carbon-steel-5-8-11-national-coarse-95115/11062281-P
2" Angle Grinder Extension (5/8-11 thread) - eBay
Spin Weld Disk Adapter - Custom Fabrication
Final Project Notes:
When I had the Spin Weld Disk Adapter built, I had the shop cut the center hole (I believe the shop used a plasma cutter) to the diameter required for the 5/8-11 tap. This, combined with the high RPM of the angle grinder may have contributed to the slight vibration experienced during this project. If I were to have another Spin Weld Disk Adapter built, I would have an 1/8" pilot hole cut in the center. I would then drill the center hole to the diameter required for the 5/8-11 tap. I believe the smoother cut of the drill bit would improve the centering of the center hole threads and hopefully reduce vibration during use.
15 окт 2022
