Tsubaki: The solution for shaft locking devices
Technical Notes PRECAUTIONS
(2) EF Series Hub Movement The hub will move when connecting a shaft and hub with an EF POWER-LOCK. This movement is caused by the deformation of the shaft and hub bore and varies depending on the hub's inner-to-outer diameter ratio a N .
7. Assembly Lubrication A POWER-LOCK's main body and bolts must be lubricated during assembly. Some may be concerned that the lubrication may cause POWER-LOCKs to slip, or the bolts to loosen. However, specified tightening torque for the bolts is calculated provided that the bolts are thoroughly lubricated. Oil is also required for the tapered surfaces to slide smoothly. If the unit is not lubricated, transmissible torque will decrease approximately 25% due to a reduction in axial force. The bolts may also deform and lead to failure. In the case of a stainless steel or an electroless nickel-plated model, however, the bolts are coated with a special substance and the main unit is prepared so that it can be operated in the“dry state”. Do not lubricate these models during assembly. 8. Bending Moment POWER-LOCKs cannot tolerate bending moments. Contact U.S. Tsubaki if a bending moment applies as illustrated below.
D ：Inner Hub Diameter D N ：Outer Hub Diameter
a N ＝ D
N
D
Hub Movement inch
Model Number
a N =1.5 a N =2
a N =3
PL010X013 EF
0.011
0.009
0.007
PL011X014 EF
0.011
0.009
0.007
PL012X015 EF
0.011
0.009
0.007
PL014X018 EF
0.011
0.009
0.007
PL015X019 EF
0.011
0.009
0.007
PL016X020 EF
0.017
0.013
0.011
PL017X021 EF
0.017
0.013
0.011
PL018X022 EF
0.019
0.014
0.012
PL019X024 EF
0.019
0.014
0.012
PL020X025 EF
0.019
0.014
0.012
PL022X026 EF
0.019
0.014
0.012
PL024X028 EF
0.019
0.014
0.012
PL025X030 EF
0.019
0.014
0.012
PL028X032 EF
0.028
0.021
0.018
PL030X035 EF
0.028
0.021
0.018
PL032X036 EF
0.024
0.018
0.015
9. Outdoor Use POWER-LOCK performance is not affected by moisture or rain due to the tight seal of parts maintained by their high interfacial contact pressure. However, the exterior surfaces will begin to rust. The rust will reduce the bolts' tensile strengths and cause a sudden drop in the general tightening force. In order to prevent this, you must use a cover, thoroughly grease the unit and take countermeasures against corrosion. If the cover causes any inconvenience, opt for the anticorrosive stainless steel or electroless nickel-plated models. Also, note that although the exterior surfaces of SL POWER-LOCKs are coated with a special lubricant, it may not be effective after a certain period of time. It may be wise to lubricate them after assembly.
PL035X040 EF
0.025
0.018
0.015
PL038X044 EF
0.035
0.026
0.022
PL040X045 EF
0.028
0.021
0.018
PL042X048 EF
0.038
0.028
0.024
PL045X052 EF
0.043
0.032
0.027
PL048X055 EF
0.043
0.032
0.027
PL050X057 EF
0.043
0.032
0.027
PL055X062 EF
0.043
0.032
0.027
0.039
0.029
0.024
PL060X068 EF
PL065X073 EF
0.052
0.038
0.032
PL070X079 EF
0.049
0.036
0.031
PL075X084 EF
0.061
0.045
0.038
PL080X091 EF
0.056
0.041
0.035
PL085X096 EF
0.071
0.052
0.044
PL090X101 EF
0.071
0.052
0.044
PL095X106 EF
0.071
0.052
0.044
PL100X114 EF
0.065
0.048
0.041
PL110X124 EF
0.065
0.048
0.041
PL120X134 EF
0.078
0.058
0.049
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