Philips Handmixer HR1178 Gear

Thanks to the perfect model from linuxpaul, and with the slight modification as described above, I was able to save my beloved Philips vintage mixer from the dumpster. The gear perfectly fits to mixer type HR1178/B (my one) and most probably to other types from the HR1170 series or from that era (about 1978 to 1985). But better to check exact dimensions first, as there are obviously small but relevant deviations. I made two perfect prints just to realize afterwards that they will not fit in.

Some hints:

• Print with shaft axle oriented vertically, octagonal pinion facing buildplate.

• Support required, of course

• Print with wall lines only instead of infill to achieve best strength.

• I chose layer height of 0,12 mm to ensure perfect shape of helical gear.

• As print material, I had Verbatim's Durabio available, which is some sort of PC (polycarbonate). Not so easy to print, but offers high strength and thermal endurance. I doubt it will last very long when using PLA. Maybe ASA will work as well.

• When printing both gears, it is NOT required to mirror one of them. They will immediately match the worm gear.

• I do not know, if this is the best choice, but I used pure Vaseline (petroleum jelly) as lubricant, as it should not harm the plastics and is food-save.

• When installing, make sure that the two gears are rotated 45° to each other, otherwise inserts for creaming / whipping will collide.

Installation was flawless - I wonder how long it will last, in particular when using with heavy yeast dough...