How do you drill and tap a hole please give step by step instructions.?

Question

please step by step instructions and if you can post a link to a website that can be helpful p.s. this is in metal

Answer 1

I don't know what size tap you are trying to use so I can't tell you the correct hole size to drill, but all you need to do is drill a hole the correct size, then just squirt a little tapping oil in the hole and run your tap in. Just screw it in like you are putting in a screw. It will thread it as it goes in and when you unscrew it it will clean itself out.

Answer 2

I am assuming you are making a hole for a usual size screw like a #6, 8, or 10. First buy a drill bit that is the tap drill size for the screw you will be using. Also buy a tap to match the screw (size and threads per inch like 6-32, 10-24, 10-32, etc) and a tap wrench to hold that tap. Those taps come tapered at the tip for through holes and blunt for a hole that is going only partway.

Use a center punch to mark the exact place you want the hole to be by tapping it with a hammer to make a dent. Now use the drill bit in an electric drill to make a vertical hole through the material you are drilling. Hold it vertically and apply a steady pressure. You should see a stream of shavings coming from the hole as you drill.

When the hole is done put the tap into its wrench. Hold it vertically and turn the tap clockwise a few turns to get it started. Now back it out counter clockwise to free any shavings. Screw it back down into the hole and turn it clockwise further in. Repeat until it goes to the bottom of the hole. [You can put a drop of oil or cutting fluid on the tap if the tap is hard to turn.] when the tap is down twist it fully counter clockwise to get it out and the hole is now ready for a screw,

Answer 3

Whatever hole you are tapping must be slightly smaller than than the tap, and the bolt thread must be the same as the tap, drill the hole dead square and start the tap carefully, turn it to get it started, and then turn half a revolution and back a quarter of a revolution, keep doing it this way until you get through.

If you are tapping a blind hole, one that doesn't go all the way through, you will need a different tap, ie. a bottoming tap, and keep it lubricated, some metals such as brass and copper are best drilled dry, don't need lubrication in fact it makes the job harder, steel takes a bit longer than most metals aluminum is the easiest but needs a bit more care as you can quite easily strip the threads, some taps come with the drill that's suitable for them or you can ask the salesman,this is important.

Being able to tap a good thread is easy if you take care and it can save you a lot of money, best of luck (but you won't need it if your careful)

Answer 4

First you must have the correct tap for the bolt you will be screwing into it. The thread count and diameter must match. Then you must have the correct drill diameter for the tap. Then you drill the hole the the piece. Next you screw the tap into the hole. Its a good idea to use some light machine oil when you are drilling the hole and when you are tapping it. It's important to drill the hole square to the piece and to not let the drill wobble - which might make the hole bigger than you want.

Answer 5

the right size drill and tap are crucial to this. the 2nd reply is encompassing.