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(1) apply together as much as possible by INA bearings axis, this required point of application symmetrically and evenly smooth through the sphere, or parallel to the axis force.
(2) the size of the force should be smooth and uniform, not shocks, this requires the use of oil or to impose a tool for smooth tension or pressure, would certainly have used when hammering, also do not fall through the copper sleeve soft scrap metal, buffers, strike force as mitigation. It is best to use copper or copper hammer blow.
(3) avoid the rolling force, this required assembling and dismantling the inner ring (shaft), through the force of the inner ring, when assembling and dismantling the outer ring) by applying pressure in the outer ring.
(4) drag force to be continued to the extent, for example in INA bearings installed when installing INA bearing to the correct position to stop applying pressure to ensure ring (washer) the end arrives, hole or shaft abutment face, cannot be squeezed too tightly and cannot be put in place.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7021ADF NSK | 105 | 160 | 26 |
| 7921CDF NSK | 105 | 145 | 20 |