Broom handle thread adapter for a mismatched head
A short adapter that lets a threaded broom or mop head screw onto a handle with a different thread, saving a perfectly good pole when the head is replaced. One end carries the common coarse ACME-style external thread of about 22 mm diameter and 4 mm pitch, the other a smooth 24 mm socket for a push-fit handle with a cross-hole for a screw. A 30 mm flange in the middle stops over-tightening and gives fingers something to grip. Print it standing up for strong threads.
Handle threads vary between brands and countries, and SpeakCAD models the pitch and diameter you measure with calipers rather than assuming a standard. Preview free in your browser, then ask for a tighter thread, a longer socket or a 90-degree angled version.
Design a broom handle adapter. External coarse thread 22 mm major diameter, 4 mm pitch, 30 mm long with 0.2 mm clearance. Opposite end a 24.3 mm smooth socket 45 mm deep with a 4 mm cross hole for a screw. Central flange 30 mm diameter and 6 mm thick.