Lets make some knobs

benkeller3 · March 7, 2018, 6:07am

I use a lots of Jigs in woodworking and always need a knob with a bolt to hold something in, down or what ever. Usually a lathe and bandsaw job. But I have a laser now!!

So designed it so the handle size is Parametric so you can vary the head of the knob size. The bolt is always 1/4 x 20 hex head. Designed in Fusion360. The design in Fusion in only used to generate a DXF so don’t get confused by the fact that every component is .1 inch thick. You just need the lines. There is a specific sketch that is labeled " 4 dxf out" that has everything in it you need to output.

The 2 parametric items are:
“hor_len” - controls the handle size in inches
“Fillet” - controls the curveyness(?) of the handle

4 layers of Lowes ply .2175 thick for my purposes
top - nice handle shape and has hex cutout for the bolt head.
next - same handle shape but 1/4 hole for bolt shaft
bottom 2 - spacers to hold the handle top out (just comfort)

A little bit of 2P-10 to glue everything into a stack and you are ready to go.

The zip contains:
1 - fusion 360 file
2 - dxf output from fusion for Inkscape
3 - svg out of Inkscape for GF

I welcome comments / improvements

parametric star knob sliced v4.zip (385.6 KB)

rpratt · March 7, 2018, 6:09am

Photos don’t load

marmak3261 · March 7, 2018, 6:10am

Thanks for documenting and sharing the file. Yes. Easy knobs for bolts and nuts is perfect.

Ah. thanks for fixing the link. Great!

benkeller3 · March 7, 2018, 6:10am

Just fixed that
sorry

rpratt · March 7, 2018, 6:13am

Thanks for this. Once my shop is back together, these will be useful.

markevans36301 · March 7, 2018, 6:43am

I’ve 3d printed and cnc’d knobs but had not thought to forge them. I’ll have to cut a few so I will have done knobs on all types of digi-fab tools.

Jules · March 7, 2018, 7:02am

Haven’t needed knobs, but that doesn’t mean I won’t! Great idea!

Paulk · March 7, 2018, 9:57am

Great work and thank you for sharing the file!

pauline.lally · March 7, 2018, 12:04pm

Thanks for the files.

bwente · March 7, 2018, 12:37pm

Add an engraved wooden face or acrylic and you have a fancy drawer pull.

benkeller3 · March 7, 2018, 2:48pm

Yep. Me too. 3d printing just takes so long. As old as I am I’ll forget what I was wanting them for by the time they finish printing. And these can be made out of any old flat scrap.

benkeller3 · March 7, 2018, 2:50pm

Well you know I hadn’t thought about that but that would certainly work for some drawers I’m building in the shop.

bruceaulrich · March 7, 2018, 5:41pm

Thanks for sharing this! I’ll probably be using it for some woodworking jigs.

cynd11 · March 7, 2018, 10:40pm

Thanks for your generous sharing!

dan · March 8, 2018, 12:59am

Neat! Thanks for sharing the files and outlining your process.

dpmarkman · March 18, 2018, 9:35pm

So I’m using bigger bolts, I modified your file and added two new parameters,

threadDia (inches): this is the diameter of the threads. You get this by measuring the width of the threaded part of the bolt.

boltHeadMin (inches): this is the measurement from the face of one side of the bolt head to the other.

Here is a public link to the file: http://a360.co/2piRCzi

Here is a downloadedable Zip file. @benkeller3 created a scketch titled " for dxf output" that is the sketch that you output.

parametric star knob sliced v4 DPMv1 v0.zip (334.2 KB)

benkeller3 · March 18, 2018, 11:45pm

Great job. That’s what makes us a community building on each other.

dpmarkman · June 10, 2018, 1:48am

OK, i needed to make another small knob. I found some problems in my previous file.

This is the best one to use now.

UpdatedKnobParametric.zip (336.4 KB)

jafarsl · June 13, 2018, 2:58am

Very nice, thanks for the share.

karl.rod.chro · March 23, 2020, 12:49am

I couldn’t open this file. It ends on f3d