Planetary Gear Unit for Students, mall-size unit for explaining the principle of planetary gear. By setting the internal, sun and pinion gears at different motions
VSMT Tackle Kit, For use with Vernier Structures & Materials Tester, includes a 50 x 50 x 6 mm and a 50 x 80 x 6 mm aluminum load plate, chain, threaded rods, U-bolts, and other accessories, connecting threaded parts are 1/4inch diameter material and 20 threads per inch