What metal drill bit for putting a Piranha on?

[Leejohn]

The dial calipers are reading dead nuts on .8949.

 

[k0ua]

Look some more at the calipers. Count the spaces and you will see the numbers indicate the line above them. When they are closed it is at 0. The number 1 is in the first space so it has to open to the line above the number 1
to be at .1.
I can not understand how you can not see what it reads, it is just a bit over.8. As you can see the last number you see is .8, then the caliper is open to just over the .8 mark. This makes it about .81 or less.
The dial has nothing to do with any thing as it is not zeroed. Count the spaces and you will see the what the numbers indicate.

I have decided to get into this caliper fight.. I know how to read them too, and I also know when I am looking at a caliper that is not even close to be zero'ed. I say the dimension is about .805 to .810 or so. The dial is obviously way way out of zero as evidenced by the angle the dial is at. By looking at the hash marks on the slide, you can see it is barely over the .8 has mark. Aint no way it is even close to .895.. So there you have it I have spoken and that should end this dial caliper fight:laughing:

James K0UA

 

[Leejohn]

The 0 on the dial face doesn't always have to be at 12 o clock. If a tooth got jumped just re 0 the dial, could be at 3 oclock or where ever as long as it gets reset to 0. Why do you think the face can be turned?

 

[Baby Grand]

I have decided to get into this caliper fight.. I know how to read them too, and I also know when I am looking at a caliper that is not even close to be zero'ed. I say the dimension is about .805 to .810 or so. The dial is obviously way way out of zero as evidenced by the angle the dial is at. By looking at the hash marks on the slide, you can see it is barely over the .8 has mark. Aint no way it is even close to .895.. So there you have it I have spoken and that should end this dial caliper fight:laughing:

James K0UA

Exactly.

 

[uglyboywith11fingers]

Exactly.

.8 give or take a curly one. IMO, looking at the dial is meaningful only if you are the one that zero'd it.

maybe the OP should have just forgot the pic and asked how best to drill thru 3/4" steel.

Pete

 

[RAYJAY]

MC MASTER CARR has them 5/8 drill bit with under cut

High-Speed-Steel 1/2" Diameter Reduced-Shank Drill Bit
5/8", 6" Overall Length, 2.1" Drill Depth
In stock
$23.59 Each

they also have them in tin coating
2905A18
Each

Also known as Silver and Deming bits, these have a 1/2" diameter shank that allows you to drill large holes using a tool or machine with a 1/2" or 3/4" chuck. The shank diameter is smaller than the drill bit size. Overall length is 6" and drilling depth is 2.1".

Slip-resistant shank bits have three flats to prevent the bit from slipping in the chuck, unless noted.

135ｰ Point Angle輸 split point keeps the bit centered without a pilot hole. Black-oxide high-speed steel bits are for use on steel, cast iron, brass, bronze, and plastic.
Drill Bit Size 5/8"
Additional Specifications Fractional Size, Black-Oxide High-Speed Steel?35ｰ Point Angle
Slip-Resistant Shank

 

[Shield Arc]

I use these when ever I can.

 

[BukitCase]

Shield, did you leave 'em ANYTHING to work with when you retired??!?

I've lost count of the reasons you've given us to either move next door to ya, or HATE ya... :laughing: Steve

(still tryin' to figger out how to get my 12-speed, mere mortal type drill press to run annular cutters, and where to find a co-signer so I kin actually BUY a few )

 

[Shield Arc]

Shield, did you leave 'em ANYTHING to work with when you retired??!?

I didn't work for a mom & pop construction company. The company I worked for is fairly good size. Depending on the size of the project, the small tools budget may be in the hundreds of thousands of dollars. Can you imagine all the small tools that were bought for a project like the first picture? When these projects are completed all the tools, and equipment is shipped back to the yard. The small tools warehouse is probably 80' x 200' with a complete machine shop in one end. The small tools manager was pretty good at selling off some of these tools at times. I got this tractor torch for $50.00!
General Construction Company


I search Craigs list three times a day for good deals, I got this mag drill for $250.00. Sometimes you can get good deals on annular cutters off ebay, or Google Product Search.

I don't know how you would adapt an annular cutter to work on a drill press. What I did for my mill was take a 3/4-inch R8 end mill adapter, cut about 3/8-inch off the end, then grind one of the stops off the end of the annular cutter. So far it has worked really well.

 

[ericher69]

My tractor dealer uses a magnetic drill press to drill holes like what you need- in seconds! It's pretty impressive.
Try a local machine shop.

+1 on the machine shop!

You may be surprised at the price they charge you!

May save a whole bunch of time and possible physical injury.

The right tool for the job...

I recently made a 1-3/8 hole in 1/2 plate and wore out one hole saw, had to buy another, had drill press issues. $$ and time ++... Machine shop $20 and time to drop off and pick up

 

[Coyote machine]

+1 on the machine shop!

You may be surprised at the price they charge you!

May save a whole bunch of time and possible physical injury.

The right tool for the job...

I recently made a 1-3/8 hole in 1/2 plate and wore out one hole saw, had to buy another, had drill press issues. $$ and time ++... Machine shop $20 and time to drop off and pick up

EXACTLY right. Forget all the caliper drivel, just get the hole drilled by someone with the right tools and safely. All the rest is a waste of time arguing about nothing of any significance whatsoever.

 

[tomfifield]

Shield Arch, what bridge is that? Is it the new Bay Bridge section?

I have a set of those calipers at home, we would never use such low end tools at Boeing although. I do think I am a bit of an expert on this, and a few people here got the readings right. All I can say is those calipers are very sloppy even when set right; yes it is just over .8, give or take some slop.

As this topic has taken a few side roads this may be of interest to some of you.
I work in the most advanced machine shop for exotic hard metals in the world, and one of the top for soft metals, this makes us the most capable machine shop in the world. We do things no one else has been able to do, I know, some try and fail. We use a number of measuring tools, from the simple hand ones, to Bronson gages, to laser trackers, to cord axle devices, some over 30 feet long. I have worked for Boeing for 35 years running machines, many of them are larger than houses, some much bigger. Most of what we make are the flight critical assembles that make the wings work and allow you to control the plane. Some of our machines are linked together with a system that brings in the parts. Many have a chip recovery system called a Henry System. Some of them rotate the beds up on their side so the chips fall off. One set of machines has multiple shuttle cars that are about 25' long. Most machines have tool loaders, and now a days the tools have chips in the holders to monitor what they are, how they are set, and how long they have been in work. I also some times run some smaller hand machines, they still are larger than a few vans, or PU trucks put together, most of the machines are run by computer systems. Our shop is nothing like a machine shop most people have seen, we are very high tech. You would be amazed at the complexity of what is in the wings. I can not say much more about what we do, security reasons.
What I can say is that the quality and accuracy of what we make is extremely high, every step of the way the parts and assemblies are inspected. The critical assemblies have ways to keep them working and the plane in the air even if some thing happens to them. You are safer flying than driving in your car by a considerable amount.

 

[Shield Arc]

Shield Arch, what bridge is that? Is it the new Bay Bridge section?

Yes it is. My company got the first three contracts. The first contract was 1-billion 316-million.

Speaking of Boeing, I have worked in several of their plants. I think it was the late 70s or early 80s I helped install 80-feet long milling machines in the Auburn plant. When we arrived to start working, there was a plywood fence 8-feet tall circling our work area. They told us we can use this bathroom, caught anywhere outside of the plywood fence, and you are unemployed!

 

[creekbend]

When I installed my W.R.Long toothbar on my FEL, I used a metal drill bit that I bought at TSC. I used a 1/2 inch drill.

 

[tomfifield]

That is funny Shield Arc, we do get a lot of classes in security measures, including what we can talk about and to who. That is all I can say on that! LOL.
I worked in a small shop in the National Guard running the kind of machines most people have seen before, I even got to drive tanks just for the fun of it.
I saw in the news they closed a section of the Bay Bridge the other day.

 

[Shield Arc]

I've done several projects at the Puget Sound Navy Ship Yard in Bremerton WA. We were always told basically the same thing. Caught out of your area and you will be escorted to the gate immediately! I think everybody I ever worked with could walk right by something top secret and not have a clue what we were looking at.:laughing:
Last project I did there was Pier D aircraft carrier pier. First pier to the right of the third aircraft carrier in this picture.

 

[gunmonkeyintl]

Well, not much use going back and forth on this...if you use calipers professionally, I think you'll change your mind. If you don't use them, well, as I wrote, not much use going back and forth...

Pompous much?

I work in Quality Assurance for a living, BTW.

Care to tell us what company you work for, so we can all be sure to buy from the other guys?

And, BTW, plenty of us work with measuring instruments for a living. You think you're the only guy on a TRACTOR forum who has a trades background?

Assuming they are zeroed, that caliper is reading .795". By your logic, if the carriage were sitting just to the right of the 1st hash, like it is just to the right of the 8th, then it would be reading .195", or if it was just to the right of the 0 hash, it would be reading .095".

There is nothing wrong with being wrong, it just makes you look like a DB when you do it with such pomp. Care for any steak sauce with that crow?

 

[murphy1244]

Pompous much?



Care to tell us what company you work for, so we can all be sure to buy from the other guys?

And, BTW, plenty of us work with measuring instruments for a living. You think you're the only guy on a TRACTOR forum who has a trades background?

Assuming they are zeroed, that caliper is reading .795". By your logic, if the carriage were sitting just to the right of the 1st hash, like it is just to the right of the 8th, then it would be reading .195", or if it was just to the right of the 0 hash, it would be reading .095".

There is nothing wrong with being wrong, it just makes you look like a DB when you do it with such pomp. Care for any steak sauce with that crow?

Good Eye!

 

[RoyJackson]

Pompous much?



Care to tell us what company you work for, so we can all be sure to buy from the other guys?

And, BTW, plenty of us work with measuring instruments for a living. You think you're the only guy on a TRACTOR forum who has a trades background?

Assuming they are zeroed, that caliper is reading .795". By your logic, if the carriage were sitting just to the right of the 1st hash, like it is just to the right of the 8th, then it would be reading .195", or if it was just to the right of the 0 hash, it would be reading .095".

There is nothing wrong with being wrong, it just makes you look like a DB when you do it with such pomp. Care for any steak sauce with that crow?

No crow required...unless you're hungry.
Look again...where that hash mark for .9 is...and the caliper is open just to that, meaning the reading is just below .900 (i.e. .895...actually, .894).
Even the OP wrote the thickness was .890 (plus a few). I should imagine he knows how to read his caliper.
Now, if the OP would be kind enough to post a picture of that caliper closed at zero, that would settle this discussion.

 

[k0ua]

No crow required...unless you're hungry.
Look again...where that hash mark for .9 is...and the caliper is open just to that, meaning the reading is just below .900 (i.e. .895...actually, .894).
Even the OP wrote the thickness was .890 (plus a few). I should imagine he knows how to read his caliper.
Now, if the OP would be kind enough to post a picture of that caliper closed at zero, that would settle this discussion.

Roy the .9 hash mark on the carriage is not visible. It will be almost another 1/10 of and inch of jaw opening before it will be visible. The carriage is slightly past the .8 hash mark. The numbers are to the left of the hash mark they represent. You need to get out your own calipers and have a look at them. When fully closed the carriage will be at the 0 hash mark, and the owner should adjust the dial to read 0 also. Which he has not done. We can only estimate the dimension as show at around .805 as this caliper is out of adjustment as evidenced by the hash marks on the carriage and the dial are not in agreement. I too wish the owner of this caliper would show us this caliper fully closed.

James K0UA