Author: TimeFramed, published on 2013-10-19
The original clamp on the umbrella cracked, so…
The second one I printed (both umbrellas’ clamps broke the same way… can you say design flaw?) without support, and it was fine.
Print the main part, upside down, with support (see photo); I also printed it with a brim. (Update 11/29/2014 – I printed a second one without support, and it printed fine.)
Print the reinforcements on their flat side (of course).
I found that due to the direction of the layering, and the stress direction, it cracked a little at the lever hole, so I made some “reinforcement” parts (that are layered the other direction), and glued them on with ABS glue.
You may need to sand the inside barrel a bit with a drum sander (drill) to get a smooth, snug fit on the umbrella pole.
I’m still using the original lever, and pressure plate.
I had to drill-out/cut the original rivet attaching the lever; I replaced it with a screw (with nice knob nuts — from a lamp, I believe). A normal screw with a nylon lock nut should work fine.
Tags: clamp, tommy_bahama, umbrella