Questions tagged [drilling]

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What is the smallest standard CNC tool holder

I am looking at making a small CNC drilling machine for light duty PCB drilling. I would like to include a tool changer. I've been looking at tool changers and tool holders and they all seem massive ...
Ron's user avatar
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Ascertain drill RPM analyzing striations

This question is about core drilling in granite. The pic below shows a granite formation that had core drilling performed on it. Is it possible to ascertain the RPM of the drill that drilled the core ...
Mars Sojourner's user avatar
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3 answers
307 views

Inconel drilling with titanium drill bits rpm

I am working on a hobby project and therefore I have to drill a total of 68 holes of 3mm in Inconel 625 plate of 0.4mm thickness. I bought some titanium drill bits: link, but I have trouble to find an ...
Bart's user avatar
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1 answer
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What should be the clearance hole size for mounting a hub on a motor shaft?

I have a motor with an 8mm shaft diameter. I'm trying to make my own hub for direct mount driving a wheel. What diameter hole size should I drill for the hub's shaft which couples with the motor shaft?...
tinker102's user avatar
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4 answers
208 views

How to drill hole into thin plastic sheet?

Ok, don't know if such simple questions get asked here, but I have a plastic PP container and I'd like to drill a couple of 1/2 inch holes into it, both on the base and the wall. Was wondering how to ...
DribbleNibble's user avatar
0 votes
1 answer
159 views

Why would the thread diameter be smaller than the drill diameter (countersink bit)

I'm having a hard time understanding the following data for the correct sizing of countersink holes I need to make a countersink for a screw with a thread size M6 which means that, according to the ...
CapBul's user avatar
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2 answers
164 views

Remove stripped screw inside of a tube

I have a stripped screw inside of a tube (see picture): The size of the screw is M2 and it seems to be glued. This is part of a camera objective so I want to avoid impact (e.g. tapping with a hammer)....
guideNeon's user avatar
1 vote
0 answers
991 views

What is DIN 338 for drill bits?

I'm looking around for drill bits, and I keep reading "DIN 338" everywhere. What is DIN 338? And what does it mean when a retailer or manufacturer writes "DIN 338" on the product ...
Mads Skjern's user avatar
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3 answers
95 views

What is the best way to tap a tube into a cylindrical canister?

Recently I bought a copper water canister/ water bottle for a project I'm doing. I'm looking to use it to replace an inline filthy broken stock water-reservoir in my Samsung fridge. My fridge has a 5/...
Evan Carroll's user avatar
1 vote
1 answer
66 views

Identify Drill name or type

I have this drill and I need one of 6mm, but I don't know how it is called. I think it is used to make a hole round and smooth with high precision. Can anyone identify what the name of this kind of ...
Bart's user avatar
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2 votes
1 answer
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designing a drill jig for manufacturing a finished product

what will be suitable drill jig for the given product? since the drill is not straight. so i'm not sure for the suitable design, kindly looking for kind help. thanks in advance! if it would have ...
Satya's user avatar
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1 answer
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Damage to drill through torque?

I've got a Bosch PSB 50 drill, which I'm using to drill through some apparently really tough wood. I don't know why, The drill seems to be struggling, and at times comes to a complete stop. I'm not ...
Mat NX's user avatar
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2 votes
2 answers
129 views

What type of drill bits are these?

https://drive.google.com/file/d/1JPV6dRqB6f__N1eCcmn6QkOStLpVdc-U/view?usp=drivesdk Here's an image for bits Head. https://photos.app.goo.gl/HS8hFqLeWn8jecka7 In the image above (Google Images & ...
Alaaj99's user avatar
  • 21
1 vote
1 answer
116 views

Chamfering with a conical bit makes a table drill vibrate

I have a slow-speed drill press which seems quite solid, the play is minimal. Normally, it does not cause problems. This conical bit: when applied to this 8 mm hole: is an exception: the bit jumps ...
scriptfoo's user avatar
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1 answer
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Question about length of commercial augers [closed]

I am planning on buying a 16mm auger for a project of mine. I was wondering if the length given (such as 460mm) included the shank and tang or if it just specified how long the business end of the ...
Guesty's user avatar
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1 vote
3 answers
101 views

What is the relationship between the type of material(ex: steel, iron etc.), thrust and torque?

If I am drilling through bars of different material(ex: iron, steel etc.) of the same thickness and under the same conditions of drill operations(feed rate and rpm), how will the torque and thrust ...
sumit808's user avatar
-1 votes
1 answer
37 views

Help with scaling torque and forces?

I am currently designing a ground based digging drill, that hopefully will be accepted by a commercial entity. I am currently working on the preliminary design of the robot and am hoping to move to ...
gunter's user avatar
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1 vote
1 answer
29 views

Glass/Tile drill bits

I meant to get a countersink for wood. Then in the hardware store, beside the countersinks, I saw a glass/tile drill bit set, which as a pack, is not so much more expensive than a single countersink. ...
Dehbop's user avatar
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2 votes
0 answers
77 views

How do I calculate Pressure drop across relief valve and then force on piston?

So, I'm designing a basic downhole hydraulic tool cutter of an OD = 5 1/2 in., and my tool contains a relief valve and a piston. I am trying to calculate pressure drop across the relief valve so that ...
Karima Zafar's user avatar
4 votes
0 answers
31 views

Is constant force a useful parameter for correct drilling operation?

I'm trying to figure out a correlation between correct feed rating and the feed force. Can a specific feed force be declared to create the correct feed rate per material per tool speed?
ceremcem's user avatar
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4 votes
2 answers
227 views

Is my aluminium drill swarf okay?

So I've been drilling standard 1/4" aluminium in a small (250W) consumer drill press. I've used a little oil to help, but I'm not sure if I'm doing it right. The holes seem okay though. They're 10mm ...
Paul Uszak's user avatar
0 votes
1 answer
21 views

mould for boring enclosures

For an electronics device that I make I use a standard plastic (I think polystyrene) enclosure. This enclosure needs to be precision-drilled, ant I lack the dedicated equipment. What I think would ...
kellogs's user avatar
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0 votes
1 answer
134 views

Basic Drilling/Production/Reservoir Engineering Terms

I am trained as a seismic geophysicist but really enjoy getting to translate what I know into what other people can understand and use for their applications, if necessary. For those with working in ...
nate's user avatar
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2 answers
78 views

Terminology for drill component?

I built/assembled a small drill press recently and used a part from a Junk Drill because I couldn't figure out what a particular component I needed was called. What I was looking for was a way to ...
Sani Evans's user avatar
1 vote
2 answers
304 views

In rock drilling, how does the drill pipe in horizontal directional drilling withstand the immense force?

Unlike vertical drills where the drill bit is weighted down by gravity, in horizontal drilling, the drill string is pushed into the rocks. How does the drill pipes not snap under the immense force, ...
Michael's user avatar
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4 votes
3 answers
2k views

Can I use a wooden flat screw head with a washer to mimick a pan head screw?

For example - I am installing a fold up table from Ikea, it needs to hang from the wall, as shown below. It explicitly says to use pan head instead of flat screw heads like shown in the picture, I ...
appwizcpl's user avatar
  • 173
1 vote
1 answer
757 views

End mill vs Drill Bit Flute Geometry

What is the fundamental difference between the flute geometry of an end mill as opposed to a drill bit? Obviously drill bits are not intended to cut horizontally so what difference about them makes ...
Scrapper's user avatar
2 votes
1 answer
219 views

How Can I do punching of 0.22mm in stainless steel sheet (Sheet thickness 0.5mm)

Wanted to press punching of 0.22mm dia (Bottom) and on (top) 0.6mm dia Please suggest how can I make such die?
user avatar
2 votes
2 answers
201 views

Is there a drill adaptor or attachment tool for cut a metal solid cylinder

I need to cut a 7mm solid Aluminium plug (Non-hollow and non-threaded) to replace a part in my car. Is there a simple drill adapter tool to cut a solid metal cylinder (Plug) from an Aluminium mass ? ...
Dumindu Mahawela's user avatar
-1 votes
1 answer
2k views

How much would a regular sized oil rig type platform cost to build?

How much would it cost to build an oil rig type platform, that floats like an oil rig, but doesn't have the functions of drilling oil and things like that? Basically what I'm trying to say is, how ...
Ben's user avatar
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0 votes
2 answers
1k views

Read holes schematic drawing notation. How to? Particular case

I am asking here for your help and advice on how to read holes schematic notations. On the attached picture I've marked with a green color part of notation that I don't know how to read / understand. ...
AlStorm Prime's user avatar
1 vote
0 answers
29 views

How do I configure g-simple so it does not use G81 code?

I have a CNC that does not understand the G81 code for drilling. G-Simple looks to be configurable but I am finding it difficult to find information on it. It looks to have a "USE" command with a "G81"...
BillyBag2's user avatar
  • 111
2 votes
1 answer
43 views

Meaning of "no mechanical delay required" in packer description (oil drilling)

This description of the Reflex Lite packer by Reactive states the following among its advantages: "No mechanical delay required" What could that mean? The packer has no built-in system of delayed ...
CopperKettle's user avatar
4 votes
1 answer
3k views

Why are drill bits always slightly undersized?

I have found that drill bits are always slightly undersized. For example, 10mm bits tend to be more like 9.8mm diameter. And in aluminium, the hole ends up being about 9.9mm. The same seems to be the ...
Jodes's user avatar
  • 1,304
4 votes
2 answers
478 views

What diameter hole will a twist drill bit of a given size actually make in a piece of metal?

I have a piston of diameter 0.7 mm exactly and a 0.7 mm drill bit. Let's call the diameter of the piston $r_1$, the diameter of a hole at the end of a tube $r_0$, and the final-actual diameter of the ...
Daniel Donnelly's user avatar
4 votes
7 answers
7k views

How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?

I have a 10 mm diameter rod of 99.5% pure tungsten that I want to drill a 0.1 mm hole in using my Grizzly G0768 lathe. The hole only needs to be between 0.1 mm and 1 mm deep and is for a 3D printer ...
Daniel Donnelly's user avatar
-1 votes
1 answer
157 views

What chuck arbor do I need for a Jacob's JT #33 chuck and G0768 grizzly lathe?

The chuck I have is: Jacob's 0-1/2" JT #33 The lathe I have is: G0768 I'm wondering what chuck arbor I need to buy / how to determine that. Related: the chuck has threads in its hole, but I see no ...
Daniel Donnelly's user avatar
7 votes
2 answers
2k views

Metal micro perforation

I'm trying to design a metal surface with micro-perforation for a product and light it from other side with LED, such that the perforated pattern appears only when lit. In my previous prototype, ...
Aditya's user avatar
  • 71
-1 votes
2 answers
330 views

Pratt & Whitney lathe drill chuck

I have an old Pratt & Whitney lathe and I need a drill chuck for the spindle sleeve. Does anyone know what kind of cone I need? It's definitely not a morse cone, since I already tested it. Since I ...
Bernd's user avatar
  • 11
6 votes
2 answers
2k views

How to drill larger bore in pipe?

I am trying to bore out a red brass pipe from 3/8" to 10mm using my drill press and a standard twist HSS bit. Running the drill at 600rpm I can't get more than half an inch in before the drill starts ...
feetwet's user avatar
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