SWBTEC
Slew Ring Excavator Bulk Savings Available
Made of high-purity 42CrMo forged alloy steel, the raceway is treated by medium frequency induction quenching, the surface hardness is 55-62HRC, and the effective hardening layer depth is more than 3.5mm. Designed for high impact load of mining excavators, the tooth fracture resistance is increased by 40%, which is perfectly suitable for mainstream brand excavator models and supplied at ex-factory price.
42CrMo alloy steel
Material
55-62HRC
Raceway hardness
≥ 3.5mm
Hardening layer depth
Slew Ring Excavator Characteristics
Forging Process of High Purity 42CrMo
Compared with ordinary 50Mn steel, our 42CrMo alloy steel has higher impact toughness and fatigue strength. Under low temperature or heavy load rock excavation conditions, the internal structure of the material is more stable, and the fracture risk is reduced by more than 35%, ensuring long-term stable operation in harsh mine environments.
deep induction hardening technology
The advanced medium frequency induction heating technology is used to ensure that the effective hardening layer depth of the raceway reaches 3.5mm to 5mm, far exceeding the 2mm standard commonly used in the industry. Deep quenching effectively prevents the raceway peeling and plastic deformation under heavy load conditions, and prolongs the design service life of the product by 3 to 5 years.
Design of Anti-breaking Teeth for Full Quenching of Teeth Root
In view of the high torque generated by the rotary emergency stop of the excavator, we carry out full contour quenching treatment on the tooth surface and tooth root, and the hardness of the tooth surface is controlled at 50-60HRC. With the optimized design of the fillet radius of the tooth root, the stress concentration is significantly eliminated, and the common tooth fracture problem in hard rock excavation is solved.
High Precision Gear Grinding Technology and Low Backlash
Gear machining accuracy reaches ISO 8 or DIN 6 standard, and single tooth runout is controlled within 0.04mm. The precision grinding process accurately controls the gear meshing gap between 0.15 mm-0.25mm, greatly reducing the shaking and abnormal noise during rotation, and improving the operation accuracy of the operator.
IP65 high performance sealing system
Equipped with high temperature resistance, anti-aging double lip NBR rubber sealing strip, protection class up to IP65. Even in extreme environments such as muddy water and sandstorms, it can effectively prevent impurities from invading the raceway and grease leakage, and protect the internal steel ball and raceway from wear.
100% ultrasonic and magnetic particle testing
Before leaving the factory, all forgings shall be tested by ultrasonic flaw detection UT and magnetic particle flaw detection MT to ensure that there are no cracks and slag pores in the material. Each set of rotary support has undergone strict no-load operation test to ensure that the starting torque meets the OEM standard of the main engine factory and realizes zero defect delivery.
Slew Ring Excavator Detailed Parameter Table
| Parameter Items | Specifications/Description |
| Product Name | Slew Ring Excavator |
| Compatible model weight | 6 tons – 100 tons (covering PC60 to PC1250 grades) |
| Main material | 42CrMo (recommended for heavy-duty applications) / 50Mn (optional for light-duty applications) |
| Raceway hardness | 55-62HRC (Medium Frequency Induction Hardening) |
| Tooth surface hardness | 50-60HRC (tooth surface and root hardening) |
| Core tempering hardness | 229-269HB |
| Hardened layer depth | Raceway: ≥3.5mm / Gear: ≥1.5mm |
| Gear precision grade | ISO Grade 8 / AGMA 8 |
| Structural form | Single-row four-point contact ball type / Double-row ball type / Three-row roller type |
| Sealing material | Oil-resistant nitrile butadiene rubber (NBR) |
| Operating temperature range | -40°C to +100°C |
| Lubrication method | Centralized lubrication system interface / Manual grease fitting |
Slew Ring Excavator Comparison Point
Most market currency only surface high-frequency hardening of the tooth surface, and Slewbearingtec use the tooth root full profile induction hardening process. This treatment improves the bending fatigue strength of the gear root by more than 40%, making our rotary support far more resistant to tooth breakage than similar competitors in the face of high impact loads generated by lateral excavation and emergency braking. In addition, we introduced a grinding instead of milling process in the finishing stage. Compared with the traditional hobbing process, the tooth surface roughness of the Slewbearingtec product is reduced to below Ra3.2, and the cumulative error of tooth pitch is reduced by 50%. This high-precision meshing not only reduces the running noise, but also greatly delays the wear caused by excessive backlash, ensuring that the excavator remains stable after thousands of hours of use.
Solve the problem of inner ring cracking
To solve the problem of surface peeling of raceway
Solve the problem of grease drying
Slew Ring Excavator Applicable Crowd
Construction Machinery Maintenance Plant and Renovation Center
For enterprises responsible for excavator overhaul and refurbishment of used equipment. This group needs parts that are accurate in size and can directly replace original parts to reduce the repair rework rate and ensure that the performance of the refurbished machine reaches more than 80% of the factory standard.
Excavator equipment and complete machine OEM manufacturer
Equipment manufacturers for the production of special excavators, wood grabbing machines or pile drivers. They need highly customized rotary support solutions and require suppliers with design capabilities that can provide high capacity and matching products to specific installation dimensions.
Construction Machinery Parts Import and Export Traders
For global accessories distributors focused on B2B sourcing. This group pays attention to the cost performance of products, the authenticity of material reports and the safety of logistics packaging, and needs long-term and stable supply chain support to meet the diversified needs of terminal retail customers.
Large Mine and Construction Fleet
End-user procurement department with a large number of heavy excavator equipment. They are most concerned about the durability and fatigue resistance of their products, and aim to extend the maintenance cycle of equipment by purchasing high-quality after-sales accessories and reduce the loss of downtime caused by the replacement of rotary supports.
Instructions for use Excavator Slew Ring
Grease filling specification
After new installation and every 100 hours of operation, extreme pressure lithium grease must be filled through the grease nipple. When filling, slowly turn the excavator for at least two weeks until the old grease escapes evenly from the sealing lip to ensure that the new grease completely fills the raceway and removes impurities.
Installation bolt pre-tightening torque inspection
After the first 100 hours of work, the pretension of all mounting bolts must be checked using a torque wrench. After that, a re-inspection shall be carried out every 500 hours of work. Grade 10.9 or 12.9 high-strength bolts must be used for bolts. It is strictly forbidden to reuse old bolts to prevent fatigue fracture.
Gear meshing clearance adjustment
The meshing clearance between the pinion and the large ring gear of the rotary support should be adjusted during installation. Be sure to place the area marked with green S paint on the outer circle of the swing support (major axis point of the ellipse) in the non-load area. Use a feeler gauge to check the flank clearance and ensure that it is within the range of 0.2mm to 0.4mm to avoid over-tightening and causing jamming.
Daily inspection of sealing system
Before each start, it is necessary to visually check whether the sealing strip is in good condition. If a large amount of grease or metal powder mixed with grease is found in the sealing lip, it indicates that the internal seal or raceway has been damaged. Once the sealing strip is found to be damaged or hardened and falling off, it must be stopped and replaced immediately to prevent sand and dust from entering.
factory and certificate
certificate
FAQ And Contact Us
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Slew Ring Excavator
Made of high-purity 42CrMo forged alloy steel, the raceway is treated by medium frequency induction quenching, the surface hardness is 55-62HRC, and the effective hardening layer depth is more than 3.5mm. Designed for high impact load of mining excavators, the tooth fracture resistance is increased by 40%, which is perfectly suitable for mainstream brand excavator models and supplied at ex-factory price.
Material
42CrMo alloy steel
Raceway hardness
55-62HRC
Hardening layer depth
≥ 3.5mm
Slew Ring Excavator Characteristics
Forging Process of High Purity 42CrMo
Compared with ordinary 50Mn steel, our 42CrMo alloy steel has higher impact toughness and fatigue strength. Under low temperature or heavy load rock excavation conditions, the internal structure of the material is more stable, and the fracture risk is reduced by more than 35%, ensuring long-term stable operation in harsh mine environments.
deep induction hardening technology
The advanced medium frequency induction heating technology is used to ensure that the effective hardening layer depth of the raceway reaches 3.5mm to 5mm, far exceeding the 2mm standard commonly used in the industry. Deep quenching effectively prevents the raceway peeling and plastic deformation under heavy load conditions, and prolongs the design service life of the product by 3 to 5 years.
Design of Anti-breaking Teeth for Full Quenching of Teeth Root
In view of the high torque generated by the rotary emergency stop of the excavator, we carry out full contour quenching treatment on the tooth surface and tooth root, and the hardness of the tooth surface is controlled at 50-60HRC. With the optimized design of the fillet radius of the tooth root, the stress concentration is significantly eliminated, and the common tooth fracture problem in hard rock excavation is solved.
High Precision Gear Grinding Technology and Low Backlash
Gear machining accuracy reaches ISO 8 or DIN 6 standard, and single tooth runout is controlled within 0.04mm. The precision grinding process accurately controls the gear meshing gap between 0.15 mm-0.25mm, greatly reducing the shaking and abnormal noise during rotation, and improving the operation accuracy of the operator.
IP65 high performance sealing system
Equipped with high temperature resistance, anti-aging double lip NBR rubber sealing strip, protection class up to IP65. Even in extreme environments such as muddy water and sandstorms, it can effectively prevent impurities from invading the raceway and grease leakage, and protect the internal steel ball and raceway from wear.
100% ultrasonic and magnetic particle testing
Before leaving the factory, all forgings shall be tested by ultrasonic flaw detection UT and magnetic particle flaw detection MT to ensure that there are no cracks and slag pores in the material. Each set of rotary support has undergone strict no-load operation test to ensure that the starting torque meets the OEM standard of the main engine factory and realizes zero defect delivery.
Slew Ring Excavator Detailed Parameter Table
| Parameter Items | Specifications/Description |
| Product Name | Slew Ring Excavator |
| Compatible model weight | 6 tons – 100 tons (covering PC60 to PC1250 grades) |
| Main material | 42CrMo (recommended for heavy-duty applications) / 50Mn (optional for light-duty applications) |
| Raceway hardness | 55-62HRC (Medium Frequency Induction Hardening) |
| Tooth surface hardness | 50-60HRC (tooth surface and root hardening) |
| Core tempering hardness | 229-269HB |
| Hardened layer depth | Raceway: ≥3.5mm / Gear: ≥1.5mm |
| Gear precision grade | ISO Grade 8 / AGMA 8 |
| Structural form | Single-row four-point contact ball type / Double-row ball type / Three-row roller type |
| Sealing material | Oil-resistant nitrile butadiene rubber (NBR) |
| Operating temperature range | -40°C to +100°C |
| Lubrication method | Centralized lubrication system interface / Manual grease fitting |
Slew Ring Excavator Comparison Point
Solve the problem of inner ring cracking
In view of the common problem of inner ring cracking of slewing bearing in mine breaker operation, the Slewbearingtec uses 42CrMo modified material instead of ordinary carbon steel to solve the pain point of material fatigue fracture under high frequency vibration conditions.To solve the problem of surface peeling of raceway
in view of the problem of surface peeling of raceway caused by long-term heavy-duty operation of excavator, the depth of effective hardening layer is Slewbearingtec increased to more than 3.5mm, which solves the pain point of early failure caused by shallow quenching unable to withstand large tonnage axial pressure.Solve the problem of grease drying
In view of the problem of grease drying caused by the aging of sealing strips in dust environment, the Slewbearingtec adopts an anti-aging double lip sealing structure to solve the pain points of steel ball stuck and abnormal wear caused by sand and dust entering the raceway.Slew Ring Excavator Applicable Crowd
Construction Machinery Maintenance Plant and Renovation Center
For enterprises responsible for excavator overhaul and refurbishment of used equipment. This group needs parts that are accurate in size and can directly replace original parts to reduce the repair rework rate and ensure that the performance of the refurbished machine reaches more than 80% of the factory standard.
Excavator equipment and complete machine OEM manufacturer
Equipment manufacturers for the production of special excavators, wood grabbing machines or pile drivers. They need highly customized rotary support solutions and require suppliers with design capabilities that can provide high capacity and matching products to specific installation dimensions.
Construction Machinery Parts Import and Export Traders
For global accessories distributors focused on B2B sourcing. This group pays attention to the cost performance of products, the authenticity of material reports and the safety of logistics packaging, and needs long-term and stable supply chain support to meet the diversified needs of terminal retail customers.
Large Mine and Construction Fleet
End-user procurement department with a large number of heavy excavator equipment. They are most concerned about the durability and fatigue resistance of their products, and aim to extend the maintenance cycle of equipment by purchasing high-quality after-sales accessories and reduce the loss of downtime caused by the replacement of rotary supports.
Instructions for use Excavator Slew Ring
Grease filling specification
After new installation and every 100 hours of operation, extreme pressure lithium grease must be filled through the grease nipple. When filling, slowly turn the excavator for at least two weeks until the old grease escapes evenly from the sealing lip to ensure that the new grease completely fills the raceway and removes impurities.
Installation bolt pre-tightening torque inspection
After the first 100 hours of work, the pretension of all mounting bolts must be checked using a torque wrench. After that, a re-inspection shall be carried out every 500 hours of work. Grade 10.9 or 12.9 high-strength bolts must be used for bolts. It is strictly forbidden to reuse old bolts to prevent fatigue fracture.
Gear meshing clearance adjustment
The meshing clearance between the pinion and the large ring gear of the rotary support should be adjusted during installation. Be sure to place the area marked with green S paint on the outer circle of the swing support (major axis point of the ellipse) in the non-load area. Use a feeler gauge to check the flank clearance and ensure that it is within the range of 0.2mm to 0.4mm to avoid over-tightening and causing jamming.
Daily inspection of sealing system
Before each start, it is necessary to visually check whether the sealing strip is in good condition. If a large amount of grease or metal powder mixed with grease is found in the sealing lip, it indicates that the internal seal or raceway has been damaged. Once the sealing strip is found to be damaged or hardened and falling off, it must be stopped and replaced immediately to prevent sand and dust from entering.
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