上浒充通大学 Forces on gears Forces on spur gears E=-F2 F=-F2 Force Direction: F-Opposite to rotation direction F2-same to rotation direction F,F2-pointing to rotating center respectively 上濟大学 Forces on gears ANGHAI HAO TONG UNIVEROIT Forces on spur gears n24 Ft1 Ft 2     Fr 1 Fr 2     Force Direction： Ft1- Opposite to rotation direction Ft2- same to rotation direction Fr1 、Fr2- pointing to rotating center respectively Forces on gears Forces on spur gears 2 1 n2 n1 Fr2 Fr1 Ft2 Ft1 n1 n2 Forces on gears Forces on spur gears