Broom Handle / Extension Rod Tip

Got an El-Cheapo broom that lasted me about 3 months before the business end fell off. Turns out the cheap injection-molded plastic threaded end failed. I was looking around on Thingiverse to see if someone already CADed out a replacement I could just print and hammer back into the broom stick. Sadly, I was unable to find such a thingi and decided to CAD my own.

If you are looking for one of these, like I was 3 hours ago, here it is! I printed it in PLA at 0.1 mm height and 25% infill to try to get something that would last. I think I have seen this same type of threading in push brooms, mops, paint roller extension rods and maybe even a few of those ceiling fan cleaners. If you need it, use it! If you make it or use it, share a photo and what you used it for.

Orientation Note: Print Threads Up! no raft no supports (like I usually try designing, because I am not patient enough for supports)

Update: Added "reinforced" version that can accommodate some M4 hardware (bolt/washer/nut) to help the plastic layers and make the part stronger. I am also going to try to use this same design to make an "expanding base" version, where you tighten the screw after it is in the broom handle so that it expands slight to ensure a tight fit.

Print Settings

Printer Brand:

SeeMeCNC

Printer:

Rafts:

No

Supports:

Resolution:

0.1 mm

Infill:

Notes:

Print Threads Up! I don't know why my STLs always seem to export upside down.

I printed mine in HB PLA at 185 deg @ 50mm/s with 0.1 mm height to try to get a solid part. It took about 2 hours to print. I may print another in PETG to ensure it doesnt break again if my PLA part fails.

Post-Printing

Fix-It Procedure

1. Remove the busted plastic from broom head and handle. (I used a Multi tool to cut the pieces out)
2. Print part (if you haven't already)
3. Optional if you are printing reinforced version:

Put bolt through washer, slide bolt through part (threaded end first! this is important because we don't want the head of the bold effecting how the part screws into the broom head) insert nut into back end and tighten firmly with screwdriver or wrench. 4. Seat the part in the broom handle and 'gently' stab the handle into the ground, newly printed piece pointed down. This was the way I was the easiest way for me to get the end into the handle without extra tools or killing my hands. You want to use the momentum of the handle to drive the piece into it. 5. Screw in the new tip into the broom end.

How I Designed This

FreeCAD and Helixes to the rescue!

I used FreeCAD and my micro calipers to measure the broom handle and what was left of the busted part. Because the threaded end broke inside the broom head, I was able to get accurate measurements for the threading and the fit is quite impressive (especially for the part fitting and working the first try!). Just a few cylinders a helix with a path sweet and some final fillets and it was all done.

Category: Replacement Parts