Torque rankings are at stall, reported as "gcm" (gram centimeters) at voltage (stall torque is the utmost a motor will develop). There are lots of links to paid surveys on the web providing you with such catalogues. https://xn--l3Ca4b8epb5b.com/category/%E0%B8%84%E0%B8%A5%E0%B8%B4%E0%B8%9B%E0%B8%AB%E0%B8%A5%E0%B8%B8%E0%B8%94%E0%B8%A1%E0%B8%B2%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88/