Questions tagged [drilling]

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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 ...
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0 votes
2 answers
46 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)....
0 votes
0 answers
331 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 ...
0 votes
3 answers
78 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/...
1 vote
1 answer
60 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 ...
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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 ...
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1 vote
1 answer
52 views

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 ...
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2 votes
2 answers
99 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 & ...
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1 vote
1 answer
105 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 ...
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0 votes
1 answer
25 views

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 ...
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1 vote
3 answers
89 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 ...
-1 votes
1 answer
33 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 ...
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1 vote
1 answer
26 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. ...
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2 votes
0 answers
48 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 ...
4 votes
0 answers
30 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?
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4 votes
2 answers
157 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 ...
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 ...
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0 votes
1 answer
112 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 ...
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0 votes
2 answers
75 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 ...
2 votes
2 answers
241 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, ...
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5 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 ...
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2 votes
1 answer
632 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 ...
2 votes
1 answer
183 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?
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2 votes
2 answers
176 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 ? ...
-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 ...
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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. ...
1 vote
0 answers
26 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"...
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2 votes
1 answer
42 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 ...
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 ...
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4 votes
2 answers
429 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 ...
4 votes
7 answers
6k 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 ...
-1 votes
1 answer
150 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 ...
7 votes
2 answers
1k 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, ...
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-1 votes
2 answers
304 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 ...
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6 votes
2 answers
1k 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 ...
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