Safety Instructions Be sure to read “Handling Precautions for SMC Products” (M-E03-3) before using. Body A Body B Carefully perform the piping work so that the tool is not in contact with the body A. Wrapping direction Sealant tape Expose approx. 1 thread Mounting Series AS Specific Product Precautions 2 Be sure to read before handling. For Safety Instructions and Flow Control Equipment Precautions, refer to “Handling Precautions for SMC Products” and the Operation Manual on SMC website, http://www.smcworld.com 2. This product has a stopper for fully close in rotating direction. Excess torque may break the stopper. Table below shows the maximum allowable torque of the handle. 3. When performing the piping work, turn the tightening tool in the horizontal direction to the hexagon across flats of the body B so that any moment is not applied to the body A. If the tool is in contact with the body A, this may cause the body B to come off. Body size Maximum allowable adjusting torque [N・m] M5 0.05 1/8 0.07 1/4 0.16 3/8 0.2 1/2 0.4 Caution For R (With sealant) Tightening method 1. The proper tightening torques of the fittings are as shown in the table below. As a guide, tighten by hand, then turn it two or three turns with a wrench. Check the dimensions of each product for the hexagon width across flats. Connection thread size Proper tightening torque [N・m] R1/8 3 to 5 R1/4 8 to 12 R3/8 15 to 20 R1/2 20 to 25 oD 45° Rz 12.5 Chamfered area for female thread By chamfering as shown in the following table, machining of threads is easier and effective for burr prevention. Connection thread size Chamfer dimension oD (Recommended value) Rc 1/8 10.2 to 10.4 1/4 13.6 to 13.8 3/8 17.1 to 17.3 1/2 21.4 to 21.6 Piping Caution 1. Refer to the Fittings & Tubing Precautions of Best Pneumatics No. 6 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 sealant tape When screwing together pipes and fittings, etc., be certain that chips from the pipe threads and sealant do not get inside the pipe. Also, when the sealant tape is used, leave approx. 1 thread ridges exposed at the end of the threads. Caution 1. If the fitting is tightened with excessive torque, a large amount of sealant will seep out. Remove the excess sealant. 2. Insufficient tightening may loosen the threads, or cause air leakage. 3. Reuse 1) Normally, fittings with a sealant can be reused 2 to 3 times. 2) To prevent air leakage through the sealant, remove any loose sealant stuck to the fitting by blowing air over the threaded portion. 3) If the sealant no longer provides effective sealing, wrap sealing tape over the sealant before reusing. Do not use the sealant in any form other than a tape type. 4. Once the fitting has been tightened, backing it out to its original position often causes the sealant to become defective. Air leakage will occur. 5. Use R external threads with Rc internal threads. Piping Threads with Sealant