Beckman Circuitmate DM-73 Battery Cover Door

Replacement for the battery door that always breaks on this historic pen DMM


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I've had this great little handheld meter since not long after high school (longer ago than I care to mention). You see them pop up on eBay from time to time, and I've purchased a backup, but the latches on the battery door are a weak point in the design. For 20+ years, I've had to put up with mine falling off, but I decided to make a faithful recreation today.

Materials and methods

I printed with Inland black PETG, 90% infill, and _ON ITS SIDE_ as shown, to align the strongest flow of the layers with the little pins that usually break off. Printed on my reinforced Creality Ender5 Pro, with borosilicate glass base, hair spray, sliced with Cura, support everywhere.

Modeled in Lightwave 3D 2015.

Will need a careful trim out from the support material, so you don't break anything.

Pretty happy with the way this came out. Will reprint if I ever buy some grey PETG.



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8181d65d73a57fc78fb4a6c7bf96f17d?default=blank&size=40jddj published this design ago