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Excavator Slew Bearing
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Product Details
| Brand Name | Titanhorse | Bore Size | 150, 4200 | |
| Outside Diameter | 200, 4500 | Model Number | 011 | |
| Feature | Four Point Contact | Gear Options | External Gear Only | |
| Seals Type | low temperature resistant rubber | Place of Origin | Beijing, China |
Product Description
Specifications
1.Chinese leading brand;2. 30 years experience
3.Material:42Crmo/50Mn;
4.Gear type:External gear,non gear,internal gear only
Product Introduction
Our Company provides four main types of slewing bearings, as shown in the following figure:
Single-row four-point contact ball series 01
|
Single-row crossed roller series 11
|
Double-row ball series 02
|
Tri-row pin roller series 13
|
Our Company can also design and manufacture other types of slewing bearings according to user’s needs, e.g. double-row ball slewing bearing, ball-pin combined slewing bearing, and light-weighted slewing bearing, etc.
For detailed drawing, please contact us directly.
Excavator
Demand characteristics: The slewing bearing for excavator is generally required to be impact to resistance, high intensity, sealability,higher precision, more stable and without noise.
Commonly-used slewing bearing models for excavator
| Product Model | Mainframe reference | Product Model | Mainframe reference |
| 013.22.0730 | 6T | 013.32.1201 | 20T |
| 013.25.0800 | 8T | 013.35.1250 | 23T |
| 013.30.1000 | 13T | 013.35.1405 | 36T |
If the above models can’t meet your demand, please contact us. You also can further determine the load and working condition and collectively write down the same in the Slewing Bearing Type Selection Technical Parameter Table. Our design and development department will recommend the most suitable product.
Material
The Company selects the most suitable materials to manufacture slewing bearings to adapt to foreseeable purposes. These materials are manufactured by a recognized steel plant. To ensure product quality, every step in the process is inspected. Tempering heat treatment is needed when the product is subject to high stress.
Customers can select materials from the following tables. Composition of two materials and two heat treatment states: 50MnZ, 50MnT, 42CrMoZ, 42CrMoT, with mechanical performance ranking from low to high. Customers can also specify other materials designations according to their needs.
Standard grade |
As-normalized condition |
As quenched condition |
50Mn | Code Z | Code T |
42CrMo | Code Z |
Code T |
The following table shows our standard steel material designations and equivalent steel material designations in other countries.
Country | Standard | 50Mn code Z/T | 42CrMo code Z/T |
China | GB | 50Mn | 42CrMo |
Germany | DIN | CK50 | 42CrMo4 |
G.B. | B.S. | 030A52 | 708M40 |
America | AISI | 1053 | 4140,4142 |
Italy | UNI | 42CrMo4 | |
Japan | JIS | S48C,SWRCH50K | SNB7 |
Spain | UNE | 42CrMo4 (F8232) | |
Sweden | SSSTAHL | 2244 | |
Australia | ASA AS | AS 1444-4140 | |
Intern. | ISO | C50E4 | 42CrMo4 |
Other materials
Special factors or functional requirements of certain applications will lead to the use of the following materials:
Stainless steel, aluminum-based light alloy, quenched structural steel or alloy, titanium alloy, special steel quenched in protective atmosphere, low-temperature special steel, cemented steel or nitride steel, and plastic composite material.
Production Process
Final Products
Certificates Show
Ø History
l Headquarter founded in the 1980s as a state-owned enterprise, reformed to be one limited liability company in 2005.
l Start to produce slewing ring in 1995, have own brand name for slewing ring.
l Four subsidiaries belong to the headquarter: Ring mill plant, Slewing ring plant, Wheel hub plant, Beijing Titanhorse International Trade Dept.
Ø Company Scale
l Total area: 100,000sq.m
l Factory: 60,000sq.m
l Office: 7,000sq.m
l 700 employees
l Lines of product: forged raw rings (The raw material of slewing ring), Slewing rings, Wheel hub
Ø Production Scale
l Slewing ring 50,000pcs/month
l Ring/flange 8,000pcs/month
l Wheel hub 20,000pcs/month
Ø Unique Advantage
l 6 series of slewing ring, the raceway diameter ranges from 200-5,000mm
l Germany 5S standard site management and QC management engineering standards
l ISO9001:2008, OHSAS18001:1999, ISO14001:2004
Operation & Maintanence
Suitable lubrication is necessary for durability of raceway and gear. Lubricating grease improves capability and service life of slewing bearing, while working condition, e.g. load, temperature, speed, and vibration, determines lubricant selection.
Characteristics of recommended lubricant for slewing bearing:
² Lithium base grease
² Minimum viscosity of base oil: 150 mm2/S
² NLGI consistency grade: 2
² Anti-friction and extreme pressure additive
² Working temperature: -300 Ca+1200 C
² Four-ball test: Clinkering load STMD 2596 (NT24)>300
² Maximum NDM value (revolving speed x raceway center diameter)
ü For ball slewing bearing=60000
ü For pin roller slewing bearing=30000
Lubricating grease compatibility table
According to our experience, the lubricating greases listed in the following table are compatible with each other and with all parts of slewing bearing. Any other grease which is deemed compatible with any of the lubricating greases recommended by the Company is usable. However, molybdenum-containing disulphide MOS2 is strictly prohibited.
Grease for raceway of slewing bearing |
Lubricating grease designation |
Grease for gear | ||||
| Aralub HLP2 | ARAL | Aralub LFZ1 |
| ||
| Rhus L 474/2 | MOTUL/bECHEM | Berulit GA 400 |
| ||
| Energrease LS-EP2 | BP | EnergolwRL/GR 154 GS |
| ||
| Grease LMX | CASTROL |
| |||
| Epexa2/Epexelf2 | ELF | Cardrexa DC1 |
| ||
| Beacon EP2 | ESSO | Surret Fluid NX |
| ||
| Mobilux EP2 | MOBIL | Mobilgear OGL 007 |
| ||
| Retina EP2-Alvania EPLF2 | SHELL | Malleus GL 205 |
| ||
| Multis EP2-Lical EP2 | TOTAL FINA ELF | Ceran AD |
| ||
This table is subject to update by manufacturer.
Removal of Common Faults
Difficult turning of slewing bearing
Every slewing bearing goes through strict inspection and test run before being released from plant, so all of them are acceptable products. In case of clamping stagnation in turning, the following method should be taken to remove the trouble:
Case |
Cause analysis |
Troubleshooting methods |
Inflexible idling of new product | The slewing bearing has been stored for long time (e.g. over a half year) or the ambient temperature is low, which results in less liquidity of the grease inside, leading to inflexible operation. This case is prominent in cold regions and in winter. | After force is exerted, if it works well without any abnormal sound, it can serve for normal serve, but new grease should be filled until it is oozed from the seal. If operation is accompanied with any abnormal sound, check whether there is any damage caused during transport or storage and feedback the information to our after-sale service department for a solution. |
Inflexible operation after installation | The mounting surface of the main machine does not match well with that of the slewing bearing, resulting in that after installation, axial clearance of the slewing bearing can’t compensate for deformation of the slewing bearing, raceway of the slewing bearing is distorted, and the roller moves with difficulty in raceway (sometimes with abnormal sound). |
Rework mounting surface of the main machine to make it in compliance with the requirements; or treat the surface by filling in plastic or partial washer. If flatness is still unacceptable after completion of surface treatment, try to exchange for a slewing bearing with larger clearance. |
Bad gear engagement is caused by failure to adjust gear backlash according to radial top point of gear pitch circle (three teeth marked with green paint). Deformation is caused by compressing the slewing bearing at the top point, resulting in difficult turning or abnormal sound. | Adjust gear and pinion engagement and gear backlash again as required. | |
Impurities are jammed in the gear and pinion. | Check and be sure that gear and pinion engagement is free of impurities. | |
Inflexible operation in use | The sealing strip is broken, resulting in entry of impurities into raceway. |
Replace sealing strip or take effective sealing protection measures, e.g. installing guard plates. |
Failure to lubricate it with sufficient grease periodically according to the maintenance requirement, resulting in abnormal wear and tear of raceway. | Lubricate it with sufficient grease until grease is oozed out from the sealing strip. It’s noted that every oil cup should be oiled, and operation should be kept in oiling, if possible. If wear and tear is serious, the slewing bearing should be replaced. If you continue using it in short time, lubricate it with more amount of grease until grease overflows, so that the scrap iron is discharged as most as possible. | |
Abnormal engagement between gear and pinion, with impurities or broken teeth | Remove impurities (if any); replace the slewing bearing, if there is any broken tooth. |
Contact Us
- Beijing Titanhorse Industry & Trading Co., Ltd.
- Contact nameWendy Dong Chat Now
- Phone86-10-63870478
- AddressRoom 5033, No. 9 Building, No. 16, Fengguan Road
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