Installing heat-set inserts for 3D printed drawer pull knobs
I designed 3D printed drawer pull knobs for the clockmaker's bench that I'm creating. Like many knobs, each of these knobs will screw onto a bolt that goes through the front of a drawer. To make the knobs hold well, I decided to press a threaded, heat-set insert into the back of each knob instead of using relatively weak, 3D printed threads.
In this video I show how to press a heat-set insert into a 3D printed part, using a soldering iron.
A nice Hackaday article on desiging for and installing heat-set inserts: https://hackaday.com/2019/02/28/threa...
The installation tip(s) for my soldering iron. Not exactly for a 1/4 inch insert, but it works for me: https://smile.amazon.com/gp/product/B...
The drawer pull knob design is open-sourced on Cults3D: https://cults3d.com/en/3d-model/home/...
The Heat-Set Inserts for plastic, for a bolt with 1/4-20 threads: https://www.mcmaster.com/94459a370
The matching 1 3/4 inch bolts to fit my bench drawers: https://www.mcmaster.com/91772a548
The "Fixture" I keep referring to in the video is simple: it's a stand-in for the front of the drawer I'm going to screw the knob into: it's a piece of wood - in this case 1 and 1/2 inch thick, with a 1/4 inch hole drilled straight into it. Just 1/4 inch of the bolt protrudes from the wood so that I can screw the knob flat into the face of the wood. As I explain in the video, this simple fixture makes the heat-set insert nicely perpendicular to the face of the knob. The fixture looks more complex just because it's a piece of scrap wood that has other holes in in.
The parts are SAE rather than Metric because 1/4 inch is a very common bolt diameter where I live.
Watch video Installing heat-set inserts for 3D printed drawer pull knobs online without registration, duration hours minute second in high quality. This video was added by user Bradford Needham 18 October 2019, don't forget to share it with your friends and acquaintances, it has been viewed on our site 83 once and liked it 1 people.