M22 Powerpole Mount

thingiverse

This is a size M22 panel mount adapter for standard 15-45A Powerpoles commonly used in amateur radio. When installed, the connector sits flush with the front of the mounting adapter, and I've tested this with connectors featuring rubber strain relief - there's plenty of clearance. The thread pitch is 2 mm to simplify printing. The design includes a screw that secures the Powerpole, providing clearance for dovetails so it can only be inserted one way. The screw features two flats spaced at 19mm (3/4") to make installation easier. A matching nut is also included for printing; a 26mm wrench can be used for tightening. The rear port allows wires to be inserted after installation if desired. The Powerpole can either be glued in from the back or retained using an M2.5 screw through the cross-hole in the screw. To use the cross-hole, install a DIN912 style M2.5x10-16 screw and rely on a friction fit. Optionally, install a standard M2.5 brass insert (3.8mm outer diameter, 3-4mm length) to better retain the screw; use a M2.5x16 DIN912 screw in that case. Note: you'll need to be able to print the inner dimensions of the screw to within ±0.1mm, otherwise you may have issues seating the plug. It's designed as a clearance fit so if it's too tight to get in then your print is too small. In the power supply picture I used 30mm as the hole spacing (center to center), to drill holes in thin sheet metal a stepped cone drill is a good choice. Update: 2017-10-14: I added a v5 DDWG for the screw that includes some additional measurements. Added a Rear variant of the screw which allows rear mounting of the powerpole and some other minor changes to chamfering (front is less chamfered and I removed the dovetail-slots from the front). This should be more convenient, especially for semi-permanent installs since you can pull out the powerpole without disconnecting the wires. The thread of this variant is full length to allow installation in very thin panels. A new smaller-diameter nut is included; this has 6 additional flats to reduce the OD to 28mm instead of 30mm. Updated 2019-04-28: Added a Mirror variant of the rear install type by request. This is to allow mounting of a 90 degree rotated powerpole stack that is apparently popular for model railroad applications. While mirroring the original mount in the printer would work, that would also reverse the thread to left hand. Since the original retention mechanism doesn't work when the powerpoles are rotated, the through hole dimensions have been changed to 2.2 and 2.6mm nominal holes that can be tapped for set-screws. Set screw M2.5 or M3 x 6mm max length should work; a UNC 4-40 set screw can probably be used as well.