Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [lathe]

22 questions
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votes
7 answers

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 hot nozzle. I don't know if this will break the bit…
Daniel Donnelly
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1 answer

What is this "clamp" place on a piece of bar stock while turning it in a lathe for?

I am watching a Youtube video depicting someone machining a crankshaft for a miniture rotary engine. Around the 4:27 mark after preparing some bar stock the person in the video places some sort of clamp on the stock before putting it into a lathe…
KDecker
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3
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1 answer

Usage of Handedness in Lathe Turning Tools

The benefit of true right-handed and left-handed turning lathe tools is obvious: You can get right up against the shoulder or face with them: The benefit of neutral-handed turning lathe tools is also obvious: You can cut in both directions or…
DKNguyen
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1 answer

What's the most cost-effective cutter bit material that can be used to machine aluminum oxide?

Al2O3 is a hard, white material used for making firebricks and numerous molded ceramic parts. Say I had a firebrick, took a core out of it using a thick-walled diamond hole saw and a drill press. What lathe insert material would I then use to…
Daniel Donnelly
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1
vote
1 answer

Identify small internal turning tool

I am using this little internal turning tool I have gotten from some company long ago as it was too worn out for them to use. By the time i gotten it for me as hobbyist, it was stil good for me to do some simple turning. Now after some time I think…
Bart
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What is the definition of depth of cut in machining?

Calculate the machining time required to reduce the shaft diameter by 6 mm if the maximum depth of cut is 2 mm, and also the parting off (cut off) time for the shaft, knowing that: the shaft diameter = 50 mm, shaft length = 500 mm, longitudinal…
Youssef Mohamed
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2 answers

Optimal gear combination with the same ratio

Summary: In a gear train, with given target ratio and configuration (eg. number of gears and how many compound gear steps are involved), what are the considerations when trying to select the optimal size (number of teeth) of the gears? Full story: I…
rockfort
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H6 tolerance shaft manufacturing

I’m a electrical engineer but an amateur in mechanics. I’ve been checking some tools and machines in the market for small works which would allow me to manufacture small but precise pieces, such as a 5mm H6 tolerance shaft to fit a bearing bore…
PDuarte
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1
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2 answers

Pneumatic Can Crusher (Number of holes allowed for crushing plate)

Hi I'm designing a pneumatic can crusher for my course, and came across a problem. How many allowable holes would be ideal to relieve pressure on the crushing plate of the device? Are there ways to go about it formula wise that may be useful? The…
soot
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How can I change a turning lathe's spindle o-ring?

I bought an old turning lathe ( Żebrak TOS S32) but there is problem with the o-ring of it's spindle. I have opened the lathe and don't know how to take out the spindle shaft and replace the damaged o-ring with a new o-ring. The following pictures…
Soheil Paper
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What do these numbers represent in the equation to calculate machining power (refer below)?

The equation here has numbers 75, 1.36 and 60. Out of which 60 is understood, it convers minutes to seconds. What do we mean by 75 and 1.36?
Pushkar
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How can a steel cylinder be parted in concentric rings with small gaps between them?

For a project, I have to part steel round stock, like the cylinder in Fig. 1, but not perpendicular to the symmetry axis (like a bread in slices) but in concentric rings 3 inch long and having the outer diameter as close as possible to 6 inch, 5…
Robert Werner
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1 answer

Machining small aluminium stock

I am very new to machining. I have access to a metal lathe that was once part of a small commercial engineering workshop. The available spindle speeds are in the range 65 to 2000 r.p.m. The existing cutting tools are all replaceable insert tools,…
CrimsonDark
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Lathe unwanted movement

I have some unwanted movement (slack? I don't know if this is the right word due to translating) on my Lathe its chisel holder between the dovetail joint between the gray area and the green area (green area with the brass screw in it). I can move it…
Bart
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0
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1 answer

Advice needed to source a compact, quiet and powerful brushless motor for a lathe

I am designing a small metal lathe for home use, and I am having trouble sourcing a motor for it. Disclaimer: I am aware that such lathes are available for purchase, and anything home-built will be nowhere close to the quality and repeatability of…
Justin8051
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