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Design/Selection Air Grippers Precautions 1 Be sure to read this before handling. Warning 1. Confirm the specifications. Products represented in this catalog are designed only for use in compressed air systems (including vacuum). Do not operate at pressures or temperatures, etc., beyond the range of specifications, as this can cause damage or malfunction. (Refer to the specifications.) Please contact SMC when using a fluid other than compressed air (including vacuum). We do not guarantee against any damages if the product is used outside of the specification range. 2. Take safety measures (e.g. mounting protective covers) when workpieces pose a danger of fingers being caught in a gripper, etc. 3. If circuit pressure drops due to a power failure or trouble with the air supply, etc., there is a danger of workpieces dropping because of reduced gripping force. Implement drop prevention measures to avoid human injury and equipment damage. 4. Keep the gripping point within the specified range of the gripping distance. When the gripping point distance becomes large, the gripper attachment applies an excessively large load to the gripper sliding section, and causes adverse affects on the service life. Refer to the graph of the specified range of the gripping distance for each series. 5. Attachment should be designed as light and short as possible. 1) A long or heavy attachment increases the inertia force to open or close the fingers. Therefore, it may cause unsteady movement of fingers and have an adverse affect on life. 2) Even if the gripping point remains within the range limit, make the attachment as light and short as possible. 3) Select a larger size gripper or use two or more grippers for handling a long and/or large workpiece at one time. 6. Provide a run off space in the attachment when using with a small or thin workpiece. If a runoff space is not provided within the finger part, gripping becomes unsteady, and it may lead to gripping failure or slippage. 7. Select a model whose gripping force is compatible with the workpiece mass. Incorrect selection may lead to the dropping of a workpiece, etc. Refer to the model selection criteria of each series of the effective gripping force and the workpiece mass. 8. Do not use in applications where excessive external force or impact force may be applied to the gripper. Excessive external force or impact force may cause a malfunction. Please consult with SMC regarding any other applications. 9. Select a model having a sufficient working finger opening/closing width. 1) Gripping becomes unsteady due to variations in opening/ closing width or workpiece diameter. 2) When using an auto switch, the detection may not be reliable. Refer to the Auto Switch Hysteresis section and set the stroke including the hysteresis length for a reliable switch function. When using the water resistant 2-color indicator auto switch, the gripper stroke may be limited by the setting of the indicator color during detection. 10. Please consult with SMC regarding a single acting, spring force only grip type. This can cause unstable gripping in some cases or return malfunction, due to faulty operation, etc. 11. Do not disassemble the product or make any modifications, including additional machining. It may cause human injury and/or an accident. 12. Refer to the Auto Switches Precautions (pages 13 to 17) if using with an auto switch. Mounting Warning 1. Operation manual Install the product and operate it only after reading the operation manual carefully and understanding its contents. Also, keep the manual in a location where it can be referred to as necessary. 2. Ensure sufficient space for maintenance activities. When installing the products, allow access for maintenance. 3. Tighten threads with the proper tightening torque. When installing the products, follow the listed torque specifications. 4. Do not scratch or dent the air gripper by dropping or bumping it when mounting. Slight deformation can cause inaccuracy or malfunction. 5. Tighten the screw within the specified torque range when mounting the attachment. Tightening with higher torque than the specified range may cause malfunction, while the tightening with lower torque may allow movement of gripping position and dropping of work. “L” and “H” are appropriate “L” is too long “H” is too long Gripping L L point Gripping point Gripping point H H Gripping point L Needle shaped workpiece Thin sheet workpiece Runoff space Runoff space 29