Types and cross-section shapes of bearing series Contact angle characteristics Angular contact ball bearings 7900C 15 ● The ball and the inner ring and the raceway of the outer ring have a contact angle (contact angle) in the radial direction, which is suitable for bearing radial load and axial load. synthetic load. ● Because of the contact angle, the axial component force is generated when the radial load acts, which is generally symmetrical or paired on both sides of the shaft. ● Contact angle 15 has high speed and 25 has axial load capacity. 7900AC 25 7000C 15 7000AC 25 7200C 15 7200AC 25. NACHI High-speed Angular Contact Ball Bearings BNH 15 ● In order to alleviate the ball sliding caused by gyro torque during high-speed operation, steel balls smaller than standard angular contact ball bearings are used. ● Compatible with 7000 series in size. Axial Load Angular Contact Ball Bearings TAH 30 TBH 40 ● Compared with the conventional TAD series (NACHI Double Row Axial Angular Contact Ball Bearings), the contact angle is smaller, the ball sliding due to gyro torque is small, and the temperature rise is low. ● Interchangeable with TAD series. NN Type Double Row Cylindrical Roller Bearings NN3000 −NNU Type Double Row Cylindrical Roller Bearings NNU4900 −● There are many rolling elements (cylindrical rollers) and high rigidity. ● The inner clearance can be adjusted by the inner diameter of the tapered hole according to the axial clamping amount of the inner ring. ● There are oil drains and oil holes in the center of the outer ring. NACHI Cross Tapered Roller Bearings XRN XRG− ● Tapered rollers are arranged with each other, and have high rigidity against axial loads and moment loads. ● Since the rollers have centers of revolution and rotation, smooth rotation is achieved. Ball screw support bearing TAB 60 TAF50(55) ● Mainly used on machine tool ball screws. ● There are open type and seal type (contact type and non-contact type). ● Mainly used on high-load ball screws of electric injection molding machines. ● Adopting large diameter balls increases the axial load capacity by increasing the contact angle.