Drill bit size to drill the hole is a 25..... Yea, that really helps me. Is this 25 just a catagory number?
Can someone convert it to Standard or Metric for me.
What would be best choice standard size bit to use for a 10/24... Right now, I'm eye balling my different sized bits an this 10/24 screw.. Thanks
2007-02-19 22:05:55 · 7 answers · asked by Cergio S 2 in Home & Garden ➔ Do It Yourself (DIY)
there are three designations for drills. letter, number and fractional number drills run from 1-80 the letter drill runs of course from a-z. and the fractional are available in as small as 1/64 inch increments. the drill you would use for 10/24 would indeed be the number 25 witch is .150 (150 thousandths of an inch) about 5/32 of an inch. if you have a drill index it probably in 1/16 inch increments the 1/8" is .125 and will be kind of tight. it will drill oversize and might just work. depending on what you are drilling you could wobble the drill just a bit. The tap may scrape out enough to get through as well.The minor diameter of the tap is about .145 If you have a chance try a test piece first if the tap breaks at least you haven't messed up the item you wish to keep. broken taps are a bugger to get back out!
2007-02-20 13:33:52 · answer #1 · answered by oreos40 4 · 0⤊ 0⤋
The easy rule of thumb, but not the NASA standard is to take a nut that fits the bolt you are threading for, then see what is the largest drill bit that will fit inside the nut. That may end up being a little hard on the tap as likely your hole will be a little small, but if you wiggle the drill bit around a bit (just a bit) it will work out just fine.
You don't need a fancy drill bit, I've worded litteraly tones of Stainles with cheap carbon steel bits drilling holes over 1"dia, the trick is feed pressure and drill speed. You need lot's of pressure, and not too much speed. Most people let their drill run far to fast work hardening the stainless and making it harder. A good rule is that if the swarf coming off the drill is changing color your are going too fast, and may have already ruined (removed the temper) your drill bit. For small drill bits HSS bits are pretty cheap, they don't get detempered nearly as easily.
2007-02-20 14:59:30 · answer #2 · answered by oneirondreamer 3 · 0⤊ 0⤋
Nothing major . A 10 /24 screw requires a 1/4" steel drill bit . The first number is the size of the screw/ bolt and the second number is the amount of threads per inch.
If your drilling into stainless you will have to buy bits made for stainless , then punch it ,drill a pilot and finally drill to correct size
2007-02-20 05:35:57 · answer #3 · answered by Anonymous · 0⤊ 2⤋
Yes, it is a sort of catagory number. Drill bits are numbered for simplicity. Rather that always write the dimension, they use the number system. At any rate, the answer is just a telephone call away. Call your local hardware store and they will tell you. I just don't happen to know right now.
2007-02-20 01:15:07 · answer #4 · answered by billy brite 6 · 0⤊ 0⤋
Use a 1/8th drill bit. That should get you where you need to be. 1/8 =.125 10-32 = .180 Sorry lost my mind for a sec.
2007-02-19 22:23:03 · answer #5 · answered by Dale 1 · 0⤊ 0⤋
I do not quite understand the ratio you are mentioning.
.250==. 1/4
.125 ===1/8
.625 == 1/16
You can also go to an auto part store or home improvement store and take the screw with you and they will sell you the EXACT TAP that you need. It does NOT cost much at all. You are probably going to have to use it again sometime and you may as well have one in your toolbox
2007-02-19 23:40:34 · answer #6 · answered by Ex Head 6 · 0⤊ 0⤋
absolute correct answer is a #26 drill which is .147 inch diameter-just checked my tapping chart
2007-02-20 08:44:29 · answer #7 · answered by Allen L 3 · 1⤊ 0⤋