The manual gear actuator can be installed directly on the pneumatic. By using Spiral bevel gears and thrust ball bearing, the gear actuator can run smoothly, and have high output torque, low noise and high efficiency. It can avoid from waterproof & oil leakage as sealing glands are used at all the through part. Protection grade can be IP65. When have no air source, can manual switch to handle direct operation. Also can install second stage gearbox according to the thrust.