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Tools explained (funny)

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DRILL PRESS: A tall upright machine useful for suddenly snatching flat metal bar stock out of your hands so that it smacks you in the chest and flings your beer across the room, denting the freshly-painted project which you had carefully set in the corner where nothing could get to it.

WIRE WHEEL: Cleans paint off bolts and then throws them somewhere under the workbench with the speed of light . Also removes fingerprints and hard-earned calluses from fingers in about the time it takes you to say, ‘Oh sh–!’

SKIL SAW: A portable cutting tool used to make studs too short.
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10 Ways Engineers Can Improve The Machinability Of Their Parts

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Machined Parts

10) Double check your drawing.  Often the default on some design software is actually a very difficult feature to make.  Do you really need a bottom tapped hole?

9) Spend a few days with the QA department the first time they qualify your new part.  It will be eye opening.

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Why Every Design Engineer Should Have A Surface Finish Scale

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surface_finish_scale

You have no idea what a 250μ milled finish is, until you see it and feel it.  These gauges are relatively cheap, durable, and a quick reference.  Having one around will make your drawings more accurate and ultimately save machining time on your parts.

Below is a handy reference chart from the Wikipeida article on surface finish.

Surface_Finish_Tolerances_In_Manfacturing

Here are some gauges you can order from Amazon.  The less expensive one is cast and not calibrated.  This means that it’s not standards compliant, and not as accurate as the calibrated scales.  In my experience, this calibration is generally unnecessary with surface finish gauges.  Learn about surface finish calibration at the National Institute of Standards & Technology’s website.

What other scales and gauges do you keep around?

8 Reasons Engineers Should Spend Their Free Time In The Machine Shop

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machine shop 1950s

8. Machinists will often need to alter your part to machine some of the features.  Work through this together and you’ll both be happier.

7. When you first bring your drawing to the machine shop, it’s common to scribble notes and explain what’s “not that critical.”  This is a valuable exercise, but take the time to alter the drawing in your design software before giving it back to the machine shop.

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