Gear 2 has its centre at point B and is rigidly attached to crank 1 which rotates about fixed axis A. Gear 2 meshes with gear 3 which rotates about axis D of connecting rod 6. Gear 3, in turn, meshes with gear 4 which rotates about axis C of slider 5. Slider 5 of slider-crank linkage ABC reciprocates along fixed guides a-a.
$1745$GL,6L$