First, how to install: You must read the company's instructions before installing and using this product to avoid unnecessary losses. Our company believes that if you install and use this product under the guidance of the manual, you will be able to achieve satisfactory results, and the cross roller roller bearing can achieve the most satisfactory results. Second, note: 1, the outer surface of the product is coated with anti-rust agent, its anti-rust period is generally 6 months, for more than 6 months of storage (such as accessories) should be re-rusted packaging or other storage Measures. 2. This product has a small amount of grease before leaving the factory. Please fill the grease as required before use. Third, the cross roller slewing bearing installation, use
1. Installation (1) The screw holes on the mounting plane must be aligned with the mounting holes on the crossed roller slewing bearings.
(2) Cross-roller turret bearing raceway quenching soft belt (external mark "S" or blocked hole) shall be placed in the non-load zone or non-frequent load zone, and the soft belts of the upper and lower rolling rings shall be staggered by 180°. The soft belt that lifts and excavates the mechanical rolling ring should be placed at an angle of 90° to the direction of the boom (ie, the direction of maximum load).
(3) Hang the cross roller slewing bearing on the bracket seat and check the contact between the bearing plane and the support with a feeler gauge. If there is a gap, the gasket can be padded to prevent the bolt from being deformed after being tightened, affecting the cross roller turntable. Bearing performance.
(4) Before tightening the mounting bolts, adjust the flank clearance according to the highest point of the gear pitch circle (three green paint marking teeth), and check the flank clearance on all the ring gears after the bolts are tightened. .
(5) The cross-roller slewing bearing mounting bolts should be made of high-strength bolts, and the bolts of appropriate strength grades should be selected according to the force. The tightening bolts should be symmetrically and continuously carried out in the 180° direction. Finally, the bolts on the circumference can be ensured to have the same pre-tightening force. The bolts on the mounting bolts should be tempered flat washers. Spring washers are prohibited. Tighten the bolts one at a time as shown below. ●The bolt size of the cross roller slewing bearing should meet the requirements of GB/T5782-2000 and GB/T5783-2000. The strength grade should not be lower than the 8.8 grade specified in GB/T3098.1-2000, and it should be selected according to the bearing force. A suitable level of strength. ●The nut size should meet the requirements of GB/T6170-2000 and GB/T6175-2000, and its mechanical properties should meet the requirements of GB3098.2-2000. ●The size of the gasket should meet the requirements of GB/T97.1-1985 and GB/T97.2-1985. Do not use spring washers. ● Bolt tightening method According to the design of the main machine, a certain pre-tightening force should be guaranteed. Unless otherwise specified, the general pre-tightening force should be 0.7 times the yielding limit of the bolt. Allow a little oiling on the threads when tightening. The pre-tightening torque or pre-tightening force is shown in Table 4. ● Bolt clamping length LK ≥ 5d (d-bolt diameter). Pre-tightening torque or pre-tightening force Note: Bolt size (GB/T5782-200GB/T5783-200) Mounting hole diameter (mm) Bolt strength grade (GB/T3098.1- 2000) 8.8 10.9 Yield strength limit σsmin of bolt material ( N/mm2) 640 900 Preload torque MA (Nm) M10 11 44 62 M12 13.5 77.5 110 M14 15.5 120 170 M16 18 190 265 M18 20 260 365 M20 22 370 520 M22 24 500 700 M24 26 640 900 M27 30 950 1350 M30 33 1300 1800 Preload force FA (103N) M33 36 293 412 M36 39 344 484 M39 42 414 581 M42 45 473 665 M45 48 553 777 M48 52 623 876 M52 56 749 1054 M56 62 863 1214 M60 66 1008 1418 Note: (1 When the bolt size does not meet GB/T5782-2000 or GB/T5783-2000, the table value needs to be calculated separately.
(6) After the installation work, the dirt and dust on the cross roller slewing bearing should be removed, and the exposed part should be coated with anti-rust paint. The raceway and gear parts should be greased.
2, cross roller slewing bearing use maintenance and lubrication
(1) Cross roller roller bearing The factory has a small amount of No. 2 extreme pressure lithium grease (GB7324-1994) added to the raceway. When it is activated, the user should refill with new grease according to different working conditions.
(2) The cross roller roller bearing bearing raceway should be filled with grease regularly. Generally, the ball support is refueled once every 100 hours of operation, and the roller is refueled once every 50 hours. For special working conditions, such as tropical, high humidity, high dust, large temperature changes, and continuous operation, the lubrication cycle should be shortened. New grease must be added before and after the machine has been shut down for a long time. The lubrication must be filled with grease in each race until it seeps out of the seal. When filling grease, slowly turn the cross roller slewing bearing to make the grease fill evenly.
(3) The tooth surface should always remove debris and apply the corresponding grease in time.
(4) After the first run of the crossed roller slewing bearing for 100 hours, the pre-tightening force of the bolt should be checked. For each 500 hours of rotation in the future, sufficient preload must be maintained. (5) Pay attention to the operation of the crossed roller slewing bearing during use. If noise, impact and power suddenly increase, stop the machine immediately, check the fault, and dismantle it if necessary.
(6) It is best to take protective measures during use to avoid adverse effects caused by wind, rain, flooding and high temperature. Prevent harder foreign objects from approaching or entering the tooth meshing area.
(7) Always check the integrity of the seal. If the seal is damaged, it should be replaced in time. If it is found to fall off, it should be reset in time.
IV. Transportation and Maintenance (1) Cross-roller slewing bearings have been sealed at the factory. The packaged cross-roller slewing bearings can be stored under suitable conditions for 6 months. The cross-roller slewing bearings are stored every 10 months. Grease is re-sealed every 6 months. (2) Transportation and storage should be placed horizontally, and storage must be placed in a dry room. (3) It is advisable to use a lifting eye screw to hoist the cross roller slewing bearing in a horizontal manner, and do not collide, especially in the radial direction. (4) At the time of stacking, place at least three uniform height blocks in the circumferential direction between each support, and the upper and lower blocks should be placed in the same direction.
