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What are the maintenance tasks for the slewing drive?

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The wear and tear of the gear teeth can cause rotation clearances in the worm screw. It is therefore necessary to check that rotation after 700 hours of operation or every 6 months, so as not to exceed approximately 20° of free rotation.  In order to measure that rotational clearance, the motor must be disconnected and the screw turned manually, measuring the angle rotated by the screw with respect to a previously specified starting position.  The previously specified inspection interval must be reduced to 200 hours of operation if the clearance reaches approximately a 15° rotation. Should the clearance continue to increase, the inspection should be reduced to 50-100 hours of operation, and in the event that it exceeds the maximum permissible value the system must be replaced. Checking mounting bolts To compensate for possible settling, it is necessary to retighten the bolts to the prescribed torque. This shall be done after no more than 100 hours of operation and without external load
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Slewing drive installation process

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 Cleaning the slewing drive and the mounting structure: • Remove extraneous material from supporting surfaces (including paint residues, welding beads, burr formation). Clear corrosion protection coating from supporting surfaces of the slewing drive. Cleaning material does not penetrate into the slewing drive. Cleaning material that attacks the sealing material is not used. Applicable cleaning materials: Cold solvents (e.g. white spirit, diesel oil, Kaltryl KEV). Lubricating the slewing drive: • slewing drive are supplied fully lubricated. They shall be greased again prior to initial operation. It is essential to use the greases specified on the delivery drawing. Choice of mounting bolts: Prescribed sizes, number and quality grades shall be used. • Grip ratio (grip length to diameter of bolt) shall be observed from minimum ≥5 to maximum ≤10. • Bolts with a fully threaded shaft are not permissible. • The function and lifespan as well as the durability of the bolt connection are affecte
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Some technical information about the slewing drive

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This system ( slewing bearing driven by a worm screw) is a complete assembly and is ready for installation. And furthermore can be very easily integrated into existing applications.  It consists of a ball bearing or rollers capable of simultaneously withstanding axial, radial and moment loads, a hydraulic or electric motor to generate relative movement between the two rings, and a fully enclosed coating protecting the ring from contamination, damage and loss of lubricant.  Moreover, with these assemblies the installation of components is avoided and is available in a comprehensive range of several standard sizes. In the following Figure all the components which make up the entire assembly can be discerned. From among its main advantages the following can be highlighted: • It is very compact, making it suitable for installations requiring space saving. • Having a very high load capacity in a very compact design. • Having a long service life. • Having low maintenance costs. • Are protec
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What effect does the clearance of the slewing bearing have on the use？

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Clearance is an important technical parameter of slewing bearing , which directly affects the technical performance of the bearing's load distribution, vibration, noise, friction, temperature rise, service life and mechanical operation accuracy. Too large clearance will cause the bearing internal capacity area to decrease, the stress on the contact surface will increase, the rotation accuracy will decrease, the vibration and noise will increase. As a result, the service life is shortened and the clearance is too small, the negative clearance (interference) may occur in actual operation, rotation jamming will be inflexible, resulting in increased friction and heating, increased temperature rise, which will make the effective clearance smaller or larger, this vicious circle will cause the bearing to lock and cannot rotate. The bearing's clearance value is artificially specified by the designer and a certain range is divided according to the size of the slewing bearing, which is u
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Slewing bearing and slewing drive grease introduction and selection

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Everyone knows that slewing bearing and slewing drive need to be filled with grease regularly, it cannot be used without lubrication, otherwise it will cause damage to the slewing bearing and slewing drive. The slewing bearings and slewing drives and other products from Unique Transmission have been filled grease before leaving from factory.  We choose to use Mobilux EP2 grease, people who buy grease often know that there are many types of grease brands on the market, and quality is uneven, fake greases are emerging in endlessly. Therefore, we must buy major brands of grease through formal channels. If add fake grease, it will also cause damage to the slewing bearings and slewing drives, our Mobilux EP2 grease is purchased through Mobil official website authorized dealers to ensure the grease quality.  Why did we choose Mobilux EP2 grease as the grease for slewing bearings and slewing drives? Let's get to know the Mobilux EP series grease. Mobilux EP series are marked as 0, 1, 2,
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These three factors should be considered when choosing a slewing bearing

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The service life of the slewing bearing is a general concern. In the selection and design stage of the slewing bearing, the service life of the slewing bearing can be obtained through theoretical calculations, but the theoretical service life is always not reached in practical applications, mainly analyze the ways to increase the life of the slewing bearing from three directions, selection design, installation and maintenance. Next, Unique Transmission will introduce the selection and design of the slewing bearing. 1.The operating environment of the slewing bearing In the selection stage of the slewing bearing, the operation environment should be described in detail. The following are several common use environments:  Humid environment:  water vapor should be prevented from entering the raceway and corroding the bearing surface, choose long lip seals or multi-lip seals, or even add multiple sets of seals. The large contact area between the seal and the bearing can effectively prevent
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How does the spur gear slew drive realize self-locking?

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Spur gear slew drive is often referred to as spur gear slewing drive. The transmission principle is a reduction device that rotates the gear ring of the slewing bearing through a pinion. It is easy to come to a conclusion from the transmission principle, the spur gear slew drive cannot self-locking, if you want to achieve exact stop, you must use a braking device to lock it. The following are five spur gear slew drive locking methods designed by U-TRSM. 1.The spur gear slew drive driven by a servo motor, under the condition of small inertia, the spur gear slew drive is usually locked by the servo motor's exact stop. The locking force of the servo motor is amplified by the gear ratio of the planetary reducer and the spur gear slew drive, finally reflected on the turntable, the final locking force on the turntable is still very large, which is very suitable for small inertia conditions. 2.The spur gear slew drive that using hydraulic motor, during use, the hydraulic motor can be bra
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