Are you supposed to use them and drill them directly into your object? I my case it's metal...and not going so well.
2006-08-16 10:56:00 · 7 answers · asked by sivan64 1 in Home & Garden ➔ Maintenance & Repairs
as far as i know, self tapping screws are supposed to be used in wood. they have a specific form which makes them "get stuck" in the wood. so it's not surprising it's not going well in metal
2006-08-16 11:03:18 · answer #1 · answered by Guy VS 4 · 0⤊ 0⤋
Self tapping drills its own hole. Buy the size that will suit your needs for proper gripping and support. You will definitely need to use a drill to install them. A cordless or a corded with variable speed . The most common problem is getting them started without having them walk on you. If that's the case then use an aul or a Phillips screw driver and tap a small indentation into the surface & it will be offer a good starting point. You can also use self tapping metal screws in other material but the hold won't be as good as screws for that purpose.
2006-08-16 12:56:06 · answer #2 · answered by audioworm31 3 · 1⤊ 0⤋
Self-tapping is the ability of a screw to advance when turned while creating its own thread. Self-tapping screws are commonly used with sheet metal and plastic components. This ability is created sometimes by creating a gap in the continuity of the thread on the screw. These edges can cut their own threads as the screw is driven in to the material, usually wood or plastic.
they will only work in sheet metal, wood or plastic.
they do not work in solid metal. drill a hole first then they will work.
2006-08-16 11:03:31 · answer #3 · answered by justnotright 4 · 0⤊ 0⤋
there are two types of self tapping. pionted ones which suck and the ones that have a flat side on the tip. depending on the metal gauge (thickness) is depending upon your pilot hole(pre drilled).
if you have to use a pilot hole always drill it at a smaller diameter than the screw so it will grab material. but the flat tipped screws are the best. you might want to use a bit sleeve for your screws too. they have a sleeve that slides over your screw so more pressure can be applied
2006-08-16 12:47:18 · answer #4 · answered by joe citizen 3 · 1⤊ 0⤋
Such screws have a tiny drill bit head on them, Used millions of them on all the Metal Buildings I constructed down in Texas.
2006-08-16 12:23:36 · answer #5 · answered by Anonymous · 0⤊ 0⤋
self-tapping= cuts it's own threads needs a hole drilled first.
self-drilling or drill-tip= doesn't need pre-drilling it does it itself.
2006-08-17 02:39:02 · answer #6 · answered by ezachowski 6 · 0⤊ 0⤋
Yes, they make their own hole and do not have to have a hole drilled first. But if they ain't working, drill a starter hole.
2006-08-16 11:03:21 · answer #7 · answered by Anonymous · 0⤊ 0⤋