L H L H L H Runoff space Runoff space Needle shaped workpiece Thin plate workpiece Finger Attachment LEHZ(J)10(L) LEHZ(J)16(L) LEHF10 LEHZ(J)20(L) LEHZ(J)25(L) LEHF20 LEHZ32 LEHZ40 ±30% (F.S.) ±25% (F.S.) ±20% (F.S.) ±30% (F.S.) ±25% (F.S.) ±20% (F.S.) Gripping Force Accuracy LEHF32 LEHF40 LEHS10(L) LEHS20(L) ±30% (F.S.) ±25% (F.S.) ±20% (F.S.) LEHS32 LEHS40 4. Select the model that allows for gripping force in relation to the workpiece weight, as appropriate. The selection of inappropriate model can cause dropping of a workpiece. Gripping force should be from 10 to 20 times (LEHZ, LEHF) or 7 to 13 times (LEHS) of the workpiece weight. 5. Do not use the product in applications where excessive external force (including vibration) or impact force is applied to it. It may lead to breakage or galling, which causes operation failure. Do not apply impact and vibration outside of the specifications. Model LEHZ(J)10(L) LEHZ(J)16(L) LEHZ(J)20(L) LEHZ(J)25(L) LEHZ32 LEHZ40 M2.5 x 0.45 M3 x 0.5 M4 x 0.7 M5 x 0.8 M6 x 1 M8 x 1.25 0.3 0.9 1.4 3.0 5.0 12.0 Bolt Max. tightening torque [N・m] Model LEHF10 LEHF20 LEHF32 LEHF40 M2.5 x 0.45 M3 x 0.5 M4 x 0.7 M4 x 0.7 0.3 0.9 1.4 1.4 Bolt Max. tightening torque [N・m] Model LEHS10(L) LEHS20(L) LEHS32 LEHS40 M3 x 0.5 M3 x 0.5 M4 x 0.7 M5 x 0.8 0.9 0.9 1.4 3.0 Bolt Max. tightening torque [N・m] Design/Selection Mounting Series LEH Electric Grippers/ Specific Product Precautions 1 Be sure to read before handling. Refer to page 469 for Safety Instructions and the Operation Manual for Electric Actuator Precautions. Please download it via our website, http://www.smcworld.com Warning “L” and “H” are appropriate. “L” is too long. “H” is too long. Gripping position Gripping position Gripping position L: Gripping point H: Overhang 1. Keep the specified gripping point. If the specified gripping range is exceeded, excessive moment is applied to the sliding part of the finger, which may have an adverse affect on the life of the product. 2. Design the attachment to be lightweight and short. A long and heavy attachment will increase inertia force when the product is opened or closed, which causes play on the finger. Even if the gripping point of the attachment is within a specified range, design it to be short and lightweight as possible. For a long or large workpiece, select a model of a larger size or use two or more grippers together. 3. Provide a runoff space for attachment when a workpiece is extremely thin or small. Without a runoff space, the product cannot perform stable gripping, and the displacement of a workpiece or gripping failure can result. Warning 1. Do not drop or hit the gripper to avoid scratching and denting the mounting surfaces. Even slight deformation can cause the deterioration of accuracy and operation failure. 2. When mounting the attachment, tighten the mounting screws within the specified torque range. Tightening the screws with a higher torque than recommended may cause malfunction, whilst the tightening with a lower torque can cause the displacement of the mounting position or in extreme conditions the actuator could become detached from its mounting position. Mounting of Attachment to Finger The attachment should be mounted at the torque specified in the following table by screwing the bolt into the finger mounting female thread and hole. 6. Select the model that allows for opening and closing width relative to a workpiece. The selection of an inappropriate model will cause gripping at unexpected positions due to variable opening and closing width of the product and the diameter of a workpiece the product can handle. It is also necessary to make a larger stroke to overcome backlash created when the product will open after gripping. 372