Mounting 12. Do not use springs, etc., to add force in the rotational movement direction. When rotational force from an external spring, etc., acts and generates negative pressure on the product’s interior, breakage of the internal seal or acceleration of abrasion may occur. Piping Caution 1. Refer to the Fittings and Tubing Precautions (pages 44 to 47) for handling One-touch fittings. 2. Preparation before piping Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips, cutting oil and other debris from inside the pipe. 3. Wrapping of pipe tape When screwing piping or fittings into ports, ensure that chips from the pipe threads or sealing material do not enter the piping. Also, if pipe tape is used, leave 1.5 to 2 thread ridges exposed at the end of the threads. Winding direction Pipe tape Expose approx. 2 threads Caution 1. Observe the specified torque to secure the block of the angle adjustment unit. If it is secured with a torque that is lower than the specified torque, the block could become loosened during use, causing the angle to exceed the set angle. 2. Do not use organic solvent to wipe the area of the name plate that shows the model. It will erase what is indicated on the name plate. 3. Do not hit the rotating shaft by securing the body or hit the body by securing the rotating shaft. These actions could cause the shaft to bend or damage the bearing. When a load must be coupled to the rotating shaft, secure the rotating shaft. 4. Do not place your foot directly on the shaft or on the equipment that is coupled to the shaft. Placing one’s weight directly onto the rotating shaft could cause the rotating shaft or the bearing to become damaged. 5. If a product is equipped with an angle adjustment function, use it within the specified adjustment range. If the product is used outside the specified adjustment range, it could lead to equipment malfunction or product damage. Refer to the product specifications for details on the adjustment range of the products. Stopper Rotary actuator θ When using a link mechanism, etc., to convert rotational motion to linear motion, and determining the operation end using the stopper on the linear motion end (see below), a small value for θ at the operation end may result in the torque of the rotary actuator causing excessive radial load to act on the output axle, and equipment breakage may occur. Install a stopper on the rotational motion side, or increase the value of θ at the operation end, to make sure the load generated does not exceed the allowable value for the product. Precautions when Converting Rotational Motion to Linear Motion There is a backlash of within 1° at the rotation end of the CRA1 series. It is necessary to decide the position of the external stopper when precise rotation is required. Backlash of the Single Rack Pinion Type CRA1 Series The external stopper becomes a fulcrum, resulting in the load’s inertia force being applied to the shaft as a bending moment. Install the stopper at a sufficient distance from the rotating shaft. If an external stopper is installed on the shaft side which is opposite of the load, the inertia force generated by the load is applied directly to the shaft. External stopper External stopper Provide a buffer angle Angle controlled by the external stopper Rotation angle of actuator without an external stopper Provide a buffer angle Rotary Actuators Precautions 3 Be sure to read this before handling. 11. Place an external stopper in a position that is away from the rotating shaft. If the stopper is placed near the rotating shaft, the torque that is generated by the product itself will cause the reaction force which is directed to the stopper to be redirected and applied to the rotating shaft. This will lead to the breakage of the rotating shaft and bearing. As a result, it could pose a hazard to humans and damage the machinery and equipment. Precautions when Using External Stoppers . Be sure to install external stoppers in the proper places. Installation in the wrong place can result in equipment breakage, which could damage other equipment or cause human injury. . Install external stoppers within the range of the rotating shaft angle. Installing an external stopper at the maximum rotation angle may result in inability to fully absorb the kinetic energy generated, and damage to equipment may occur. When using external stoppers at rotation angles of 90°, 180°, or 270°, use products with rotation angles of 100°, 190°, or 280° respectively. Warning 25