huongdaoroma OP t1_j271maa wrote on December 30, 2022 at 2:49 AM

Reply to comment by JonJackjon in Weak drill > Non-flush screws > Load?? by huongdaoroma

Update: Drill bit broke inside one of the screw holes while pre-drilling after advice. Can it hold 55 lb with only 3 of 4 screws (middle screw not used...)?

JonJackjon t1_j27g8oo wrote on December 30, 2022 at 4:43 AM

I would not venture to take a guess.

However if I were motivated to use only 3 holes I would purchase longer screws in stainless steel. The stainless steel part is important. It approximately doubles the tensile strength.

keestie t1_j27ne7o wrote on December 30, 2022 at 5:50 AM

I work construction. Stainless steel screws are terrible. They snap, bend, and the heads strip far more easily than normal steel. The only use for them is if you really need to avoid corrosion.

huongdaoroma OP t1_j27gfi0 wrote on December 30, 2022 at 4:45 AM

I'll just get drywall mud and redo it again with a Ryobi driver/impact set. Any suggestions for drill bit brands?