HP 97 Printer Gear

[Hiwi]

Hi,
the 3D printed gears do not work very well. The gears flanks are sometimes too flat.
I tried with my prusa printer, shapeways and even a very high tech 3D printer in our company.

The modellbauershop has 2 versions of the appropriate pitch, one is wider, costs 5 times of the smaller one, but works perfect. The samller one costs only 3 Euro and works good with a washer.

The bore should be 2.4mm. The shop has very high quality drills on stock. I took some from 2.1 up to 2.4mm and drilled in four passes on a high precision drill press from proxxon.

Do not try to bore in one pass with a 2.4mm or 2.5mm drill.

This fits perfect on the axle and runs smoothly.

A bit of silicon grease (or mos2) and the printer works like new. (Minor louder)

The modellbauershop offers a service to make custom gears, so you can get gears with 2.4mm bore from there, i suppose.

I won't buy the 3D printed gears on ebay. They are racketeering in my mind. :-)

There is a seller on ebay in germany who offers a metall gear for 29 euros. Give him a try.
He is a HP specialist. I am not related to him.

Ralf