Rosette for door handle

Plastic door handles (see photo) with plastic rosettes have one drawback: the rosettes crack over time.

It's often possible to buy new ones, but they can also be printed.

The rosettes shown here have an external diameter of 52.5mm, an internal diameter of 49.5mm and a height of 9mm.

For rosettes intended for door handles, the hole for the handle is 20.5mm.

For single lock rosettes, the hole height is 25mm and width is 9mm. The inside guide is 5mm (in relation to the inside surface, 6.50mm in relation to the outside surface).

For the rosette with an indicator (white-red, unlocked, locked), note that the indicator opening is slightly smaller than the original (1mm). The reason for this is that in the original rosette, the opening sometimes reveals the edges of the indicator, as it is slightly too large.

Although it's possible to print these rosettes in PLA, I'd tend to recommend ASA (which is what I used) or ABS (but I haven't tried it). The reason is that if you want to make them very smooth and paint them, ASA will be more suitable.

See also the printing tips below.

The first photo shows a complete door handle

The next two photos show a handle rosette print (light gray) made in ASA with the front printed on the printing plate and then sanded. The split rosette on the right is the original one (glossy white).

The next two show the same rosette printed with the front facing upwards.

The next two show a single-key rosette (original and printed version), printed with front face facing up and painted.

The last photo shows a complete print set painted white, with the front face facing up.

I will only describe ASA printing.

I use CURA and the printer I use is a Creality Ender-3 S1 PRO.

I used an ApolloX filament from FormFtura with very good results. Layer thickness is 0.2mm, print temperature (in a closed enclosure) is 250°C, platen (bed) temperature is 90°C.

Face-down printing (on the printing plate): this is the fastest and simplest printing method from the adhesion point of view. The main drawback is that the front face will not be smooth (this may depend on the structure of the tray). Printing takes less than an hour.

With ASA printing, it is possible to sand the print to obtain a smooth surface ready for painting.

Print with front face up: this is the default print. Remember to activate stretching and supports. With stretching activated, you'll have a virtually smooth surface ready for painting. On the other hand, printing takes a long time (just over 2 hours if you use a raft. A little less with a border) and more expensive in terms of materials.