Installation method: when using the tight fitting inner ring, the installation method depends on whether the bearing is a straight hole or a conical hole. Then install the lock washer and lock nut or clamp end cap to fix the bearing on the shaft shoulder. After the bearing cools gradually, when the outer ring of the lock nut or clamp end cap rotates, it should fit tightly with the bearing seat, and the bearing seat can be heated to expand to complete the installation. The oil bath method is shown in Figure 10. The bearing should not be in direct contact with the heat source. The common method is to place an isolation net several inches away from the bottom of the oil tank and separate the isolation net from the bearing model with a small support block. The bearing must be away from any high-temperature heat source nearby to prevent the hardness of the bearing ring from decreasing due to excessive bearing temperature.
Flame heating is usually used** Use automatic temperature control equipment. If safety regulations prohibit the use of open hot oil bath, 15% soluble oil-water mixture can be used. This mixture * * can be heated to 93 ° C without generating flames. Most applications of the thermal expansion method of installing straight hole bearings require the shaft to heat the bearing with an interference fit to expand it enough to slide in easily along the journal, Installation can be easily completed. There are usually two heating methods: - hot oil tank heating - induction heating * * one method is to heat the bearing in hot oil with high flash point. The oil temperature cannot exceed 121 ° C. in most applications, 93 ° C is enough. The bearing should be heated for 20 or 30 minutes, Or until it expands enough to slide into the journal easily, the bearing can be installed by induction heating. The induction heating process is very fast, so special attention must be paid to prevent the temperature from exceeding 93 ° C. generally, experimental heating operation is required to master the correct heating time. According to the fixed melting temperature of wax, the temperature of the bearing can be measured. After the bearing is heated, Ensure that the bearing is vertically against the shoulder and fixed until it cools down.
The bearing of thermal expansion method is supported by the isolation net, and the lubricating oil bearing support block is heated by flame. Do not use steam or hot water to clean the bearing, otherwise it will cause rust or corrosion. Do not heat the bearing surface on a flame. Do not heat the bearing more than 149 ° F. Before warning the heating parts, please remove the oil or rust inhibitor on them to avoid fire and thick smoke. Note that failure to comply with the following warning information may result in serious personal injury or death. Hand wrench stamping is usually used as an optional installation method for small-size bearings. It is to press the bearing onto the shaft or bearing seat. This method requires a hand wrench press and a mounting sleeve. As shown in Figure 11, the mounting sleeve shall be made of mild steel, and the inner diameter shall be slightly larger than the diameter of the shaft. The outer diameter of the mounting sleeve shall not exceed Timken Timken on COM / catalogs ® The diameter of the shaft shoulder is given in the catalogue of self-aligning roller bearings (Order No. 10446c).
The two ends of the installation sleeve should be vertical, the inner and outer surfaces need to be thoroughly cleaned, and the sleeve should be long enough to ensure that the end of the sleeve is still longer than the shaft end after the bearing is installed. If the outer ring is tightly matched into the bearing seat, the outer diameter of the installation pipe should be slightly smaller than the inner diameter of the bearing seat. The inner diameter cannot be less than Timken Timken on COM / catalogs ® According to the diameter of the shoulder of the bearing seat recommended in the selection guide of self-aligning roller bearing (Order No. 10446c), apply light engine oil on the shaft to reduce the force required to press in the tight fitting. Carefully install the bearing on the shaft and ensure that it is perpendicular to the center line of the shaft. Apply a stable pressing force by the hand lever to make the bearing firmly against the shaft or the shoulder of the bearing seat.
Flame heating is usually used** Use automatic temperature control equipment. If safety regulations prohibit the use of open hot oil bath, 15% soluble oil-water mixture can be used. This mixture * * can be heated to 93 ° C without generating flames. Most applications of the thermal expansion method of installing straight hole bearings require the shaft to heat the bearing with an interference fit to expand it enough to slide in easily along the journal, Installation can be easily completed. There are usually two heating methods: - hot oil tank heating - induction heating * * one method is to heat the bearing in hot oil with high flash point. The oil temperature cannot exceed 121 ° C. in most applications, 93 ° C is enough. The bearing should be heated for 20 or 30 minutes, Or until it expands enough to slide into the journal easily, the bearing can be installed by induction heating. The induction heating process is very fast, so special attention must be paid to prevent the temperature from exceeding 93 ° C. generally, experimental heating operation is required to master the correct heating time. According to the fixed melting temperature of wax, the temperature of the bearing can be measured. After the bearing is heated, Ensure that the bearing is vertically against the shoulder and fixed until it cools down.
The bearing of thermal expansion method is supported by the isolation net, and the lubricating oil bearing support block is heated by flame. Do not use steam or hot water to clean the bearing, otherwise it will cause rust or corrosion. Do not heat the bearing surface on a flame. Do not heat the bearing more than 149 ° F. Before warning the heating parts, please remove the oil or rust inhibitor on them to avoid fire and thick smoke. Note that failure to comply with the following warning information may result in serious personal injury or death. Hand wrench stamping is usually used as an optional installation method for small-size bearings. It is to press the bearing onto the shaft or bearing seat. This method requires a hand wrench press and a mounting sleeve. As shown in Figure 11, the mounting sleeve shall be made of mild steel, and the inner diameter shall be slightly larger than the diameter of the shaft. The outer diameter of the mounting sleeve shall not exceed Timken Timken on COM / catalogs ® The diameter of the shaft shoulder is given in the catalogue of self-aligning roller bearings (Order No. 10446c).
The two ends of the installation sleeve should be vertical, the inner and outer surfaces need to be thoroughly cleaned, and the sleeve should be long enough to ensure that the end of the sleeve is still longer than the shaft end after the bearing is installed. If the outer ring is tightly matched into the bearing seat, the outer diameter of the installation pipe should be slightly smaller than the inner diameter of the bearing seat. The inner diameter cannot be less than Timken Timken on COM / catalogs ® According to the diameter of the shoulder of the bearing seat recommended in the selection guide of self-aligning roller bearing (Order No. 10446c), apply light engine oil on the shaft to reduce the force required to press in the tight fitting. Carefully install the bearing on the shaft and ensure that it is perpendicular to the center line of the shaft. Apply a stable pressing force by the hand lever to make the bearing firmly against the shaft or the shoulder of the bearing seat.
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