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Questions tagged [tools]

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26 views

What are design features of impact type screwdriver bits?

Modern screwdriver bits, marketed for impact tool use, have "torsion" control, apparently implemented with a necking of the bit. Does this feature reduce the delivered peak torque? Practically, ...
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1answer
39 views

Why is the fluted edge of a twist drill bit sharp?

My intuition on how a twist drill bit operates is that the cutting is done by the end of the drill bit and that the fluted section carries away material as it's cut. When I look at twist drill bits, ...
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1answer
20 views

Swiss File #4 Alternatives

I want to buy a "Swiss File #4". I visited some local stores but noone knew what that was. I found this nice set of files. Can someone read what it says in the top? Is some of these file equivalent ...
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2answers
69 views

Should lithium batteries be recharged after every use , or when they are exhausted?

For a small unit like a drill: Is it better to charge after any use or wait until the lithium battery is exhausted ?
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1answer
44 views

How do you determine the apt cutting speed of a hot wire foam cutter?

I am designing an automated hot wire foam cutter for my project, and I am stuck on the computation for the most viable cutting speed of my design. The cutting tool used is a nichrome wire and the ...
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2answers
64 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 ...
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0answers
13 views

How can one count the flutes on an end mill with diamond pattern?

This carbon fiber-cutting end mill tool has two intersecting spiral patterns going opposite directions. How can one determine the flute count for calculating feed rate?
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4answers
99 views

Git, Mercurial, others — what's the best system for an engineering team new to version control?

I recently started working with a new team doing detailed energy modeling for all flavors of building projects -- commercial, industrial, residential, new construction, renovations, additions. As the ...
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2answers
37 views

Why are angle grinder discs consumable?

I learned in high school science that everything has a hardness index, that metal has a relatively low hardness compared to many kinds of stones, and that something cannot be scratched by a substance ...
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0answers
21 views

What constitutes AGILITY where Behavior-Driven and Unit Testing are concerned [closed]

This morning I had a presentation on PHPSPec which the official website describes as follows: A php toolset to drive emergent design by specification. As defined within an adjective context the ...
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1answer
44 views

Lubricant fluid and Rubber compatibility

I have a portable band saw, which I plan to add lubricant fluid to (this is getting ahead of myself, as I haven't even constructed a portable band saw stand). The main problem with this and the reason ...
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2answers
81 views

Cutting tool for hollow tubes [closed]

We have steel hollow tubes of 80 mm length and 0.5 mm cross section, that we need to cut in smaller pieces of 10.1 and 10.5 mm length. We have been using utility knifes with very poor results. I am ...
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3answers
59 views

Heating up Tool Steel with a welder

I'm a newbie of electricity and I would like to know if a piece of tool steel connected to both positive and ground pole of a welder tend to heat up red hot. If yes, at wich amperage? There are some ...
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1answer
53 views

Potentially fatal near miss: Due diligence in tool selection

I recently outfitted a crew to build scaffold in preparation for an upcoming turnaround at our plant. Among the tools requested were canvas buckets for manually hauling material and tools up and down ...
1
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1answer
48 views

What are the electronic readout versions of Dial Indicators called?

These items: https://www.parktool.com/product/dial-indicator-gauge-set-for-ts-2-2-and-ts-2-truing-stands-ts-2di are mechanical gauges with roller tips that are intended to measure deviations from true ...
3
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3answers
85 views

Making precise, intricate measurements

What's the best way to precisely measure intricate mechanical parts? For example, notice the tiny differences between the pitch in these two threads, and the tiny variations in external width of the ...
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2answers
91 views

Where is the contact point between screw spindle teeth and nut teeth?

So this is a screw press used to hmm disconnect the clamp connection (sorry if these are not the correct terms I really don't know how to translate it properly). Anyway, I think it's obvious what this ...
1
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1answer
39 views

Are “Imperial Eastman” compression connections sized the same as regular imperial connections?

I have some high pressure and vacuum lines off of a tool from the 1980s and they are labeled as, for example, "3/8 imperial - eastman," which seems to be different from how normal compression ...
2
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2answers
5k views

Do micrometer calipers have any advantage over vernier calipers?

Micrometer calipers measure thickness. Vernier calipers can measure both thickness and inside diameter. For the same least count and accuracy, both are similarly priced. Do micrometers have any ...
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2answers
1k views

Difference between an angle grinder and an abrasive saw

It seems to me that abrasive saw is a term mainly used in the US (the Wikipedia article on it has no links to pages in any other languages), whereas angle grinder has some 20+ translations. So, can ...
4
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2answers
2k views

Can we build a tool that measure curvature on an arc?

I know some biologist that are taking curvature measurements on photos with softwares to understand the variation on beak morphology. I'm wondering if there is a way to build a mechanical tool (or ...
2
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2answers
2k views

How to regulate a vacuum pump?

I need a vacuum pump to provide at least 21" Hg of vacuum. Looking at the cheap rotary pumps on ebay, this one seems to be way more than fit for the job. Is there a way though I can regulate it ...
4
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1answer
102 views

3D Representation of Magnetic Field Lines

There are several tools available for monitoring electrical metrics (voltage, current, resistance, frequency). I have recently acquired all that I need for these studies. What tools are available for ...
4
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2answers
1k views

What prevents using a toothed blade with a cutoff saw designed for abrasive discs?

I have an abrasive cutoff saw that I use to cut metal, it runs at 3800RPM. You cannot cut aluminum with these saws, so I bought a carbide blade rated for 3800RPM. I went to install it, but after ...
3
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1answer
330 views

How to read micrometer?

I am just posting here to verify that I am properly using a tool that is new to me, a micrometer. Here is what the precision label specifies, basically that it can measure up to an inch and down to 1/...
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2answers
1k views

What is the advantage of using a four-sided crimper vs. pliers?

I'm trying to crimp some pins onto 20 AWG wire. I can either use a tool like this: Or I can just use pliers, which are obviously cheaper and more readily available. Why should I use the more ...