U.S. TSUBAKI POWER-LOCK ®
Technical Notes INSTALLATION AND REMOVAL
AS, AD, ADN, AE, FL, KE, TF, EF Series Installation and Removal
Notes: 1. A torque wrench must be used to tighten the locking bolts. Be sure to follow the above instructions to tighten the bolts to the specified torque. Hand-tightening or tightening with a wrench other than a torque wrench will result in incomplete installation, and lead to accidents. 2. Exceeding the specified tightening torque M A will damage the bolts. On the other hand, tightening to torque below M A will cause the bolts to loosen during operation. Be sure to use the correct torque to tighten these bolts. 3. Do not use bolts other than those provided. Otherwise, bolts may damage and cause accidents. If you misplace or damage any bolts, contact U.S. Tsubaki for replacement. B. Removal (1) Verify that no torque or thrust is applied to the hub and shaft. Note that in cases where a heavy shaft, hub or chain is used, disassembly may be slightly complicated. After removing the load, disassemble the unit by loosening the bolts in the correct order described in Installation A. Caution: Loosening the bolts will release the locking function, which may cause the shaft to spin or jump out. (2) If the unit does not remove even after loosening all the bolts, tighten the bolts into the screw holes prepared for removal. This will release the lock. Note: Take caution in installing and removing AD/ADN Series POWER-LOCKs for they have relatively smaller taper angles.
A. Installation (1) Verify that the shaft and the inner surface of the hub are clean, we recommend to lightly oil surfaces. Note: Do not use silicone or molybdenum lubricants. Otherwise, friction coefficient will reduce, and standard torque will not be achieved. (2) Remove the bolts and clean all contact surfaces. Lightly coat the bolts, including their bearing surfaces, with oil or grease. For AD/ADN Series POWER-LOCKs, use an oil bath or a spray method to thoroughly lubricate each part. (3) Tighten the bolts part way, and preliminarily assemble the POWER-LOCK. Notes: 1. Pre-assemble by keeping the phases of the
slit and the taps for removal out of synch. For AD/ADN Series, maintain maximum space between the taper rings. 2. In the case of step shaft installation for AE Series, make sure the space between the hub and the steps is greater than 1 mm.
(4) Mount hub to shaft, and lightly push the POWER-LOCK to the end of the hub. Take caution in carrying out this process with the AD/ADN Series for their taper angles are relatively small. When the hub does not smoothly slide onto the shaft, either loosen the bolts or lightly tap on the hub until it is fixed into place. Notes: 1. Do not hit the POWER-LOCK with a hammer. This will severely damage the product and possibly lead to accidents. 2. Included spacer must be used with a TF Series POWER-LOCK. Without the spacer, the unit will not transmit torque. (5) Determine the position of the hub along the shaft circumference and length. Using a torque wrench, tighten one bolt to approximately quarter of the specified torque M A , and then tighten the one diagonally across in the same manner. Repeat for the other bolts. (6) Using the torque wrench, tighten the bolts to one- half the specified torque M A and repeat the tightening procedure in step (5). (7) Bring up to full tightening torque M A and tighten as in step (5). (8) Tighten each bolt to full torque M A in a circular order. Repeat a few times until the bolts are completely tightened.
Parts 1: Taper Ring A 2: Taper Ring B 3: Outer Ring 4: Inner Ring 5: Locking Bolts
AS Series
Parts 1: Outer Ring
AE Series
2: Inner Ring 3: Locking Bolts
Parts 1: Inner Ring
TF Series
2: Outer Ring 3: Spacer 4: Locking Bolts
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