Mounting Block and Bracket for U-Post and Round Posts
We calculate the final price from your selected file. You review and accept it before payment.
Saved on this device.
A mounting assembly for attaching prints to posts- originally made to mount a bird nesting box.
- Rating
- 0 / 5
- Likes
- 12
- Downloads
- 110
- Makes
- 1
- Views
- 548
- Reviews
- 0
Updated at source:
Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Public Domain
These post mounts were originally designed to attach a bird nesting box to a post, as in this print :
https://www.printables.com/model/832468-bluebird-housenest-box
However, the basic design can be applied to other prints, provided that appropriate mounting holes are provided. The screw holes for mounting the MountBlock to another printed piece are M4 clearance holes on the corners of a rectangle 2.5" (63.5mm) wide by 0.75" (19.05mm) high.
The two U-Post versions are designed for two different types of posts typically sold as follows :
- “small” : 1 in. x 2-1/4 in. x 7 ft. Green Steel Fence U Post with Anchor Plate (see photos).
- "large" : 7' Steel Fence Heavy Duty U-Post with Anchor Plate (the posts I purchased had a width of 2")
The round post version is designed for nominal ½" electrical conduit (which is actually 0.706" in diameter (17.9mm). Note that I did not print this version, but I expect it should work. Screw lengths may need to adjusted as needed.
Additional parts required (stainless steel hardware is recommended for outdoor use):
- M4x20 SHCS with washers and hex nuts (qty 2 each) - for the Bracket
- M4x16 SHCS with washers and hex nuts (qty 4 each) - for the MountBlock
- Add additional (qty 2) M4 SHCS for the round post version
- M6x35 hex head machine screw and washer/nut for large and small post mounts
- Not required for the round post version
Note that the screw lengths given work for my uses, but since manufacturing tolerances vary, longer or shorter screws may be required in some cases. The screw lengths given for the MountBlock are based on the nest-box print, and may vary for other uses.
Assembly and Use
Begin the assembly by adding the four hex nuts to the hexagonal recesses in the front side of the MountBlock; the round post version has an two hex holes on the back side. I recommend using a SHCS and washer inserted into the hex nut through the hole opposite the hexagonal recess, and then tightening the screw to pull the hex nut into the socket (the hex nuts will be a tight fit).
Note that the holes for the hex bolts (and Bracket screws for the round post version) have sacrificial support material covering the hole; simply punch out this thin layer using the screw.
The U-Post versions are mounted to the post by fitting the hex bolt though the holes already in the posts, and fastening with a washer and hex nut.
The round post version is mounted to the post by fitting the post into the semicircular opening in the MountBlock and clamping it in place with the Bracket piece using two M4 SCHS..
Print Instructions
Print in PETG using the 3mf files provided, otherwise :
- 0.2mm layer height
- 4 perimeters
- 15% grid infill
Print with the Bracket laying side down on the print bed. Print the MountBlock with the four hexagonal recesses facing up.
Note : The print shown in the photos is in two colors only because I ran out of yellow filament part way though the print and had to switch to black filament.
CAD
The OnShape 3D CAD files for this are here :