2.5" Shop-vac extension and accessory hanger

A simple design to hold shopvac wands, nozzles, and accessories.  This one is sized for nominal 2.5" shop-vac hoses (which have male ends with an OD of 2.25"/56mm and female ends with an OD of 2.5"/64mm).  The printed size is slightly smaller than 2.25" so that the ring will grip nicely around the attachment.

They have holes for four screws, with recessed holes that will keep the screw from pressing into the vacuum attachment, and have room for #8 washers. Using washers is recommended to help keep the plastic base from cracking when you tighten the screws.  I use round-head phillips #8 screws and drywall anchors to attach them to dry wall in my workshop.

There is also a version available for nominal 1-7/8" vacuums.

Filament 
Not picky.  I use rapid PETG because it's cheap and has a nicer flexibility than PLA, but it should work fine in pretty much any filament.

Print Settings

I recommend supports ON for the desk clamp and hand knob, and off for the other models. The Camera Mount Part B may require supports on some printers or filaments depending on bridging capability.

Version History / Changelog:

v2.0 - 2024-05-09

• Complete redesign
• Thickened walls to 4.5mm
• Reduced diameter a bit for better grip
• Replaced the countersunk holes with flat-bottom counterbored holes with room for washers.  This significantly reduces the cracking problem when tightening screws.
• Included STEP file as well as STL
• Generated 1-7/8" version

v1.1 - 2024-01-15

• Thickened the ring walls for better grip

v1.0 - 2023-09-12

• First version