How big do my motors need to be?

hi,
i need 2 motors push 750g - 1kg of weight.

i have tried these motors:

https://www.amazon.co.uk/gp/product/b01ezqcjty/ref=oh_aui_detailpage_o04_s00?ie=utf8&psc=1

and slowed down/ increased torque gearbox gear ratio 8:1.

this hasn't been enough how bigger motors need be?

you need measure force required move weight -- use luggage scale or similar.

then convert torque, can compare motor specifications. here introduction force , torque.

discussion on converting torque push.

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > How big do my motors need to be?

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