A Little Machinist Jack

DaveR · February 28, 2019, 12:27pm

Finally had time. First try. Needs a few things but I’ll work on them later.

davidheim1 · February 28, 2019, 1:06pm

Sweet. Can you add some dents and scratches, and maybe a smear of grease, to make it look more authentic?

DaveR · February 28, 2019, 1:08pm

Thanks. I’ll see what I can do.

duanekemp · February 28, 2019, 6:11pm

Sweet work and render DaveR.

Cotty · February 28, 2019, 6:28pm

For a biomechanic, it’s probably as dirty as it gets?

DaveR · February 28, 2019, 6:31pm

Yes.Tools have to be taken care of and kept clean.

Anssi · February 28, 2019, 6:41pm

For many of their tools, veterinarians face a tough choice: Order a medical tool from a specialist supplier or go to the local hardware store and buy an essentially identical item with a fifth of the price.

DaveR · February 28, 2019, 6:47pm

That’s true. Veterinarians can sometimes get away with using hardware store tools. When a surgeon is working on humans, though, they can’t really get away with using a wooden-handled hardware store claw hammer to drive a knee implant into some guy’s tibia.

Anssi · February 28, 2019, 6:51pm

The person who’s toolset I have seen wouldn’t, I think, use one to treat cows either…

lewiskauffman · March 4, 2019, 3:16am

Awesome, as always!

uweb · March 4, 2019, 12:39pm

Hi DaveR
How did you draw the threads? Did you use a “thread” plugin or do you make them with basic Sketchup tools?

DaveR · March 4, 2019, 12:45pm

The only extensions I’ve seen for drawing threads don’t do a very good job. I used a combination of native tools and some more generic extensions. Three key ones are Curve Maker, Eneroth Upright Extruder, and Eneroth Auto-Weld. I looked up the specs for each thread I drew so I could get the dimensions right.

uweb · March 4, 2019, 1:47pm

Thanks.
Regarding the specs of the thread, did you draw a metric ISO thread or a Whitworth thread?
I ask, since for ISO threads, the outer side of the thread on the screw is chopped less than the inner side (see orange circles in below picture, which I just googled now). With a Whitworth thread the inner and outer side is “chopped” by the same amount.

In your drawing I have the impression that the outer side of the thread is “chopped” more than the inner side. Is this on purpose and there are different definitions for these threads?

DaveR · March 4, 2019, 1:52pm

Good eye. I did inadvertently draw the thread on the jack incorrectly using P/4 instead of P/8. By the time I caught it, the render was nearly finished and so I decided to leave it. It would be trivial to fix the model but I’ve moved on.

blackdogSUP · April 10, 2019, 4:04pm

Awesome idea!!! (the chess pieces out of various hardware store bolts)