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A simple method of mounting medium KOYO bearings. When the bearing inner ring is tight fit, when for a loose fit in the outer ring, copper bar close to the inner ring of the bearing surface, with a hammer directly strike the copper rod, leaving a copper rod, slowly put the bearing on the shaft. The bearing inner ring is large, the available copper rod evenly around banging along the inner ring of the bearing surface, must not only beat, or too much force, symmetry, and beating slowly loaded onto gently, so as not to put slice split bearings.
This method and the use of copper rod installation KOYO bearing the same reason. It is the sleeve pressure directly on the bearing surface (pressure on inner ring when the bearing on the shaft end face; mounted in shell holes, hold the outer ring face), Bishop strike force is evenly distributed in the installation of bearing rings on the face as a whole and can be used with a press to install saving time and reliable quality. Install the sleeve should be as soft metal (copper and low carbon steel can be). When bearings are mounted on the shaft, inner diameter should be slightly larger than the shaft sleeve 1-4mm outside diameter slightly smaller than the diameter of the bearing inner ring ribs or the thickness of the sleeve shall prevail, the thickness of 2/3-4/5 should be made equal to the thickness of the bearing inner ring and sleeve should be flat and perpendicular to the cylinder at both ends. When the bearing mounting holes, outer diameter should be slightly smaller than the outside diameter of the bearing sleeve.
There is also a press indentation: install pressure should be directly imposed on the interference fit of the bearing rings on the end, otherwise it will cause bruised on the bearing surface, cause damage to the bearings very quickly.
Large amount of interference for the installation or large size bearings KOYO bearings, for ease of installation, use the principle of expansion and contraction, bearing after heating in a tank with copper rods, sleeves, and Bishop installed. General control of heating temperature 100 ℃, 80-90 ¡æ more appropriate. When the temperature is too high, easily lead to bearing Raceway and the rolling annealing, affect the hardness and wear resistance, resulting in lower bearing life and premature end.
1. Release the fixed bearing bolts. To note is that before the end of the bearing axis removed. I should be the other end bearing bolt to prevent each bearing strength and destruction of others on both sides.
2. Locking screw with a hex wrench, loosen the bearing, and then covered with small bars to the eccentric sink hole on the axis of the beat eccentric, first.
3. Load eccentricity. Condoms in the first step and along the axis of the bearing with eccentric sleeve hand tighten. Then insert a small rod or put it in the sink hole subjected to eccentric. Bishop percussion along small steel rod axis. Eccentric collar securely finally eccentric hexagonal lock screws.
4. Bearings are fixed, do not tighten the bolts, coat the bearing can be rotated within the bearing. Then tighten the bolt a good relationship. Also installed with shaft bearing and seat, rotate the other end of the shaft, bearings find their location automatically.
5. As the bearings and bearing lubricant finish, entering the bearing housings. And Assembly of bearings and bushings. Push-installed to the location you want.
6. Bearing on the shaft before installing, you must unplug the KOYO bearings coat pins, in the Editorial Department of journal surface polishing and lubrication (allows a slight rotation of the bearing) smooth and clean, oiled rust.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7210C NSK | 50 | 90 | 20 |
| 7210BEA NSK | 50 | 90 | 20 |