SWBTEC
Crane Slew Ring Ready To Ship
Using 42CrMo forged steel and raceway intermediate frequency quenching process, with excellent anti-overturning torque capacity, designed for heavy lifting equipment high-strength rotation design. Slewbearingtec is the source manufacturer, excluding all trade intermediaries, can provide customized services, can provide very competitive ex-factory prices and as short as 15 days of fast delivery guarantee.
Our products
Crane Slew Ring Characteristics
Raceway quenching hardness upgrade
The surface of the raceway adopts high frequency and medium frequency quenching treatment, and the hardness is stable at 55 to 60HRC, which effectively reduces the metal fatigue caused by high frequency rotation, and greatly prolongs the service life of the crane slewing bearing.
Precision control of backlash tolerance
The gear machining accuracy is strictly controlled within 0.05mm, and the tooth surface contact area is greater than 70% mm, which significantly reduces the impact wear when lifting heavy objects and reduces the mechanical vibration of the rotary system.
Significant increase in load-bearing torque
Using 42CrMo forged high carbon steel material with strict ultrasonic flaw detection, the yield strength exceeds 850 MPa, and it can stably withstand the ultimate overturning moment of the crane under the extreme telescopic boom state.
Sealed dust-proof structure
The configuration of high wear-resistant nitrile rubber double lip sealing ring reduces the intrusion rate of dust and water vapor by more than 90%, greatly reducing the workload of terminal maintenance engineers to clean up contaminated grease.
Optimizing the design of oil injection channel
Uniformly distributed independent lubricating oil channels are reserved inside, so that the grease can cover the rolling elements in all directions, reducing the daily maintenance time of the 40% and avoiding deadlock due to local lack of oil.
High compatibility standard size
The installation hole distance and flange size are manufactured in strict accordance with industry standards, and the hole position deviation is less than 0.1mm, which ensures seamless and fast installation by maintenance personnel during equipment overhaul or emergency replacement.
Crane Slew Ring Technical Specifications
| Parameter name | Specifications and data standards | Scope of application and instructions |
| Inner and outer ring materials | 42CrMo / 50Mn forged steel | Specialized high-load heavy-duty crane equipment |
| hardening of raceway | 55 HRC – 60 HRC | Enhance compressive strength and resistance to metal fatigue. |
| Scroll body type | Steel balls/crossed cylindrical rollers | Adaptable to different axial and radial stress conditions |
| Gear type | External gear / Internal gear / Gearless | Custom manufacturing based on drive motor layout |
| Tooth surface hardening | 45 HRC – 50 HRC | Reduce wear during drive pinion meshing |
| Radial/Axial Clearance | 0.02 mm – 0.06 mm | Ensure high precision in crane boom rotation positioning |
| cage material | Nylon/Brass Spacer Block | Reduce operating noise and improve lubrication efficiency |
| sealing ring material | Nitrile rubber double lip seal | Adaptable to high dust and high humidity working environments |
| Extreme operating temperature | -40 degrees Celsius to 120 degrees Celsius | Meets the operational requirements of industrial sites in extreme cold to high temperatures |
| Connecting bolt grade | Level 10.9 or Level 12.9 | Withstands extreme tensile force to ensure installation safety |
Crane Slew Ring Comparison Points
Compared with the conventional slewing bearings using ordinary carbon steel and rough heat treatment on the market, the Crane slew ring produced in Slewbearingtec has a special secondary surface hardening treatment at the tooth root. This process enables the gear to withstand the crane emergency stop or full load reverse rotation, with a very high resistance to broken teeth, to avoid the traditional products in the high-intensity operation of the frequent occurrence of gear cracking phenomenon, to the greatest extent to ensure the continuity of crane construction operations. In terms of structural stability, Slewbearingtec introduced more stringent axial and radial clearance control criteria. Compared with the widespread problem of large rotational sloshing in similar alternatives, our products accurately compress the clearance error. This not only improves the absolute accuracy of high-altitude lifting and positioning, but also significantly reduces the abnormal mechanical noise during the operation of the whole machine, and provides a safer and more reliable operation guarantee for front-line operation and maintenance engineers.
Overhaul the difficult problem of raceway indentation under high load conditions
Eliminate the hidden danger of seal failure in extreme harsh environment
Resolve After-sales Maintenance Parts Size Deviation Troubled
Crane Slew Ring Target audience
Port Terminal Crane Maintenance Team
Port container gantry cranes require twenty-four hours of uninterrupted high-load operation. The product has extremely high fatigue strength and anti-salt spray sealing performance, which is very suitable for the regular overhaul and parts replacement of port equipment, and can effectively reduce the huge economic losses caused by the unexpected shutdown of the equipment.
Maintenance Department of Construction Machinery Leasing Company
The use of rental equipment is complex, and the durability of spare parts is extremely demanding. The slewing bearing with high wear resistance and high load bearing characteristics can help lessors reduce the daily maintenance frequency of tower cranes and effectively control long-term operation and manual maintenance costs in long-term cycle use.
Equipment Maintenance Group of Offshore Engineering Platform
Offshore cranes are always faced with the challenge of overturning moment brought by strong wind and corrosive marine environment. This product has excellent tensile strength and strict anti-corrosion protection structure, which can ensure that the ship and drilling platform lifting equipment can still rotate safely and smoothly in harsh sea conditions.
On-site emergency repair group of mine heavy equipment
Mining hoisting machines often operate in harsh environments full of slag and dust. The built-in dustproof double lip seal ring and convenient oil filling channel design greatly reduce the difficulty of lubrication maintenance, obstacle removal and component replacement for mining machinery repair engineers in extreme open field.
Instructions for use Crane Slew Ring
Flatness inspection of the base before installation
Check the crane base with a laser flatness meter to ensure that the local flatness error is up to standard. Rust and oil on the surface of the base must be thoroughly removed to prevent uneven local forces during operation.
High strength bolt cross fastening
After the Crane slew ring is hoisted in place, high-strength bolts of grade 10.9 or above must be used in conjunction with the torque wrench, and the bolts must be gradually tightened to the rated preload in three steps according to the diagonal cross sequence.
Accurate adjustment of gear meshing backlash
When installing the drive pinion, always use a feeler gauge to measure the meshing backlash at the highest point of the gear runout. Adjust the gap to within standard tolerances and apply grease evenly to the contact surfaces.
Regular oil injection and clearance monitoring and maintenance
For every 100 working hours of the equipment, a sufficient amount of extreme pressure lithium-based grease shall be supplemented to the inside through a special channel. Periodically use a dial indicator to measure the axial clearance, and replace it in time if it exceeds the warning value.
factory and certificate
certificate
FAQ And Contact Us
Welcome to our Frequently Asked Questions page. We have compiled answers to common questions you may have, hoping to provide you with clear and quick solutions. If you cannot find the information you need here, please feel free to contact our customer support team.
Please feel free to contact us. We look forward to hearing from you.
Crane Slew Ring Ready To Ship
Using 42CrMo forged steel and raceway intermediate frequency quenching process, with excellent anti-overturning torque capacity, designed for heavy lifting equipment high-strength rotation design. Slewbearingtec is the source manufacturer, excluding all trade intermediaries, can provide customized services, can provide very competitive ex-factory prices and as short as 15 days of fast delivery guarantee.
42CrMo
Material:
55 to 60HRC
Hardness:
custom external gear
Tooth type:
Crane Slew Ring Characteristics
Raceway quenching hardness upgrade
The surface of the raceway adopts high frequency and medium frequency quenching treatment, and the hardness is stable at 55 to 60HRC, which effectively reduces the metal fatigue caused by high frequency rotation, and greatly prolongs the service life of the crane slewing bearing.
Precision control of backlash tolerance
The gear machining accuracy is strictly controlled within 0.05mm, and the tooth surface contact area is greater than 70% mm, which significantly reduces the impact wear when lifting heavy objects and reduces the mechanical vibration of the rotary system.
Significant increase in load-bearing torque
Using 42CrMo forged high carbon steel material with strict ultrasonic flaw detection, the yield strength exceeds 850 MPa, and it can stably withstand the ultimate overturning moment of the crane under the extreme telescopic boom state.
Sealed dust-proof structure
The configuration of high wear-resistant nitrile rubber double lip sealing ring reduces the intrusion rate of dust and water vapor by more than 90%, greatly reducing the workload of terminal maintenance engineers to clean up contaminated grease.
Optimizing the design of oil injection channel
Uniformly distributed independent lubricating oil channels are reserved inside, so that the grease can cover the rolling elements in all directions, reducing the daily maintenance time of the 40% and avoiding deadlock due to local lack of oil.
High compatibility standard size
The installation hole distance and flange size are manufactured in strict accordance with industry standards, and the hole position deviation is less than 0.1mm, which ensures seamless and fast installation by maintenance personnel during equipment overhaul or emergency replacement.
Crane Slew Ring Technical Specifications
| Parameter name | Specifications and data standards | Scope of application and instructions |
| Inner and outer ring materials | 42CrMo / 50Mn forged steel | Specialized high-load heavy-duty crane equipment |
| hardening of raceway | 55 HRC – 60 HRC | Enhance compressive strength and resistance to metal fatigue. |
| Scroll body type | Steel balls/crossed cylindrical rollers | Adaptable to different axial and radial stress conditions |
| Gear type | External gear / Internal gear / Gearless | Custom manufacturing based on drive motor layout |
| Tooth surface hardening | 45 HRC – 50 HRC | Reduce wear during drive pinion meshing |
| Radial/Axial Clearance | 0.02 mm – 0.06 mm | Ensure high precision in crane boom rotation positioning |
| cage material | Nylon/Brass Spacer Block | Reduce operating noise and improve lubrication efficiency |
| sealing ring material | Nitrile rubber double lip seal | Adaptable to high dust and high humidity working environments |
| Extreme operating temperature | -40 degrees Celsius to 120 degrees Celsius | Meets the operational requirements of industrial sites in extreme cold to high temperatures |
| Connecting bolt grade | Level 10.9 or Level 12.9 | Withstands extreme tensile force to ensure installation safety |
Crane Slew Ring Comparison Points
Overhaul the difficult problem of raceway indentation under high load conditions
Slewbearingtec optimizing the contact curvature radius between the internal rolling element and the raceway, dispersing the stress concentration area, and thoroughly solving the industry problem that the raceway surface is prone to plastic deformation when the heavy crane is overloaded.Eliminate the hidden danger of seal failure in extreme harsh environment
Slewbearingtec equipped with weather-resistant special nitrile rubber double-lip sealing ring to block water vapor and dust intrusion, and solve the maintenance hidden danger of internal rust and jam caused by sediment intrusion in coastal ports or high-dust construction sites.Resolve After-sales Maintenance Parts Size Deviation Troubled
In view of the difficult alignment of installation holes in the maintenance market, the Slewbearingtec adopts high-precision CNC machine tools to ensure zero error in the hole diameter of each Crane slew ring and avoid the trouble of secondary reaming by engineers on site.Crane Slew Ring Target audience
Port Terminal Crane Maintenance Team
Port container gantry cranes require twenty-four hours of uninterrupted high-load operation. The product has extremely high fatigue strength and anti-salt spray sealing performance, which is very suitable for the regular overhaul and parts replacement of port equipment, and can effectively reduce the huge economic losses caused by the unexpected shutdown of the equipment.
Maintenance Department of Construction Machinery Leasing Company
The use of rental equipment is complex, and the durability of spare parts is extremely demanding. The slewing bearing with high wear resistance and high load bearing characteristics can help lessors reduce the daily maintenance frequency of tower cranes and effectively control long-term operation and manual maintenance costs in long-term cycle use.
Equipment Maintenance Group of Offshore Engineering Platform
Offshore cranes are always faced with the challenge of overturning moment brought by strong wind and corrosive marine environment. This product has excellent tensile strength and strict anti-corrosion protection structure, which can ensure that the ship and drilling platform lifting equipment can still rotate safely and smoothly in harsh sea conditions.
On-site emergency repair group of mine heavy equipment
Mining hoisting machines often operate in harsh environments full of slag and dust. The built-in dustproof double lip seal ring and convenient oil filling channel design greatly reduce the difficulty of lubrication maintenance, obstacle removal and component replacement for mining machinery repair engineers in extreme open field.
Instructions for use Crane Slew Ring
Flatness inspection of the base before installation
Check the crane base with a laser flatness meter to ensure that the local flatness error is up to standard. Rust and oil on the surface of the base must be thoroughly removed to prevent uneven local forces during operation.
High strength bolt cross fastening
After the Crane slew ring is hoisted in place, high-strength bolts of grade 10.9 or above must be used in conjunction with the torque wrench, and the bolts must be gradually tightened to the rated preload in three steps according to the diagonal cross sequence.
Accurate adjustment of gear meshing backlash
When installing the drive pinion, always use a feeler gauge to measure the meshing backlash at the highest point of the gear runout. Adjust the gap to within standard tolerances and apply grease evenly to the contact surfaces.
Regular oil injection and clearance monitoring and maintenance
For every 100 working hours of the equipment, a sufficient amount of extreme pressure lithium-based grease shall be supplemented to the inside through a special channel. Periodically use a dial indicator to measure the axial clearance, and replace it in time if it exceeds the warning value.
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