SWBTEC
Slew Ring Gear
Slew Ring Gear is a precision mechanical component integrating support, rotation and power transmission. It is made of high-strength 42CrMo alloy steel and matched with tooth surface induction hardening process. It can realize micron-level accurate transmission efficiency while bearing thousands of tons of axial and radial loads. It is the core power hub of heavy machinery and automation equipment and supports batch ordering.
Slew Ring Gear important parameters
M2-M30
Modulus range:
HRC50 +
Tooth surface hardness:
P5/P6
Accuracy class:
Slew Ring Gear Characteristics
Prolonged service life:
the tooth part adopts deep induction hardening treatment, and the effective hardening layer depth reaches 3-5mm, which improves the wear resistance of the tooth part by 45%. Even under the impact condition of frequent starting, the tooth surface peeling or early tooth breakage can be avoided, and the service life can be extended by 3-5 years.
Fatigue strength improvement:
high-quality tempered alloy steel is selected, and its tensile strength can reach more than 980MPa. Compared with ordinary 50Mn material, the fatigue strength is improved by 30%, which effectively solves the problem of matrix deformation of heavy lifting equipment under large overturning torque.
Smooth and vibration-free under high-speed rotation:
the accumulated error of the circumferential section is controlled within 0.03mm through the precision tooth grinding process, and the meshing backlash is accurately adjusted to 0.03 m-0.04m, thus significantly reducing the transmission noise by 15dB and ensuring smooth and vibration-free under high-speed rotation.
Block external debris from invading the raceway:
equipped with high-sealing lip sealing strip to reach IP66 protection grade, strictly block external dust, moisture and debris from invading the raceway, and extend the maintenance period of grease from 100 hours to 500 hours.
Simplify the assembly process of the purchaser:
directly process high-precision bolt holes and positioning pin holes in the inner and outer rings, simplify the assembly process of the purchaser, eliminate the cumulative assembly tolerance of more than 0.1mm brought by the traditional split structure, and greatly improve the operation accuracy of the whole machine.
Solve the local excessive wear caused by uneven meshing:
Before leaving the factory, make a green painting mark on the highest point of gear radial runout, guide the installer to match accurately at the pinion meshing place, and solve the local excessive wear caused by uneven meshing.
Slew Ring Gear Detailed specifications table
| Specifications | Industry standard data/reference range | Technical Advantages |
| Basic Material | 42CrMo / 50Mn | Provides an extremely high balance of fatigue strength and toughness |
| Modulus | 2mm – 30mm (customizable) | Adaptable to drives ranging from precision medical equipment to ultra-heavy-duty cranes |
| Gear Type | Internal teeth, external teeth, or toothless | Flexible adaptation to various hydraulic or electric drive layouts |
| Hardness of raceway quenching | HRC 55 – 62 | Ensure that the raceway does not develop pitting under heavy loads. |
| Gear hardness (hardened by quenching) | HRC 50 – 60 | Greatly improves the compressive strength of the meshing surface of the teeth |
| Run-out tolerance | 0.05mm – 0.15mm | Ensure uniform speed during 360-degree rotation. |
| Operating temperature range | -30°C to +120°C | Adaptable to working environments ranging from extreme cold in polar regions to high temperatures in metallurgical industries |
| Lubrication ports | 4-8 symmetrical distributions | Ensure that the grease evenly covers the entire raceway and gear teeth. |
Slew Ring Gear Comparison Points
Extremely high system rigidity and light weight balance: compared with the split scheme of “bearing + independent gear”, the height of the integrated Slew Ring Gear structure is reduced by 20%, the system rigidity is increased by 1.5 times, and it can carry greater overturning moment in limited installation space.
Abnormal transmission noise and abnormal vibration:
through tooth profile modification and high-precision grinding, the pulsation interference during gear meshing is solved, and the operating noise of precision turntable or medical equipment is controlled below 60 decibels.
Risk of tooth breakage under high torque conditions:
For impact loads such as excavators and rotary drilling rigs, the sudden brittle fracture caused by root stress concentration is solved by root strengthening treatment.
High maintenance frequency leads to downtime loss:
for outdoor and industrial and mining environments, the use of grease storage tank optimization design and high-performance sealing, to solve the problem of bearing seizure caused by grease loss.
Slew Ring Gear Applicable crowd
Construction machinery manufacturer (OEM):
It is suitable for excavators, truck cranes and tower cranes to provide core rotation support and high torque power output to ensure the safety of equipment under severe working conditions.
New energy power generation equipment supplier:
used for wind turbine yaw and pitch system, solar automatic tracking bracket, to meet the high reliability, low maintenance operation requirements of up to 20-25 years.
Industrial robots and automation integrators:
for palletizing robots, welding robotic arms and precision rotating worktables, it provides a transmission core with high repetitive positioning accuracy (± 0.01 °) to support precise path control.
Port Machinery and Ship Repairers:
For ship unloaders, portal cranes and ship deck lifting equipment, large-diameter rotating solutions with extremely high corrosion resistance (such as surface galvanizing or special spraying) are provided.
Instructions for use Slew Ring Gear
FAQ and Contact Us
Get a Free Quote Today.
Our factory
A: The slewing bearing gear not only bears the vertical pressure, but also bears the lateral tilting force more often. Through the calculation of overturning moment, the raceway diameter and the number of balls/rollers can be accurately determined to prevent the risk of overturning during equipment operation.
A: 42CrMo contains chromium and molybdenum elements, and has better hardenability and low temperature toughness. In alpine environment or high frequency vibration conditions, the fatigue life of 42CrMo is about 25%-30% higher than that of 50Mn.
A: Not so. Too high hardness will lead to a decrease in toughness, prone to brittle fracture. We usually control between HRC 50-60 to ensure hardness while retaining the impact toughness of the tooth root.
A: Standard specification products are usually prepared with blanks, and the delivery time is 4-6 weeks. For special modulus or non-standard large diameter customized products, the process includes forging, precision machining and heat treatment, which usually takes 10-14 weeks.
A: First check the lubrication state; secondly check whether the mounting bolts are loose; finally check whether there is foreign matter in the gear meshing gap. If it is a rhythmic percussion, check the tooth surface for indentation or pitting.
A: We can provide phosphating, galvanizing or Dacromet surface treatment, and cooperate with high-grade FKM (fluorine rubber) sealing ring, so that it can maintain excellent structural integrity in the high corrosion environment of sea salt spray.
Slew Ring Gear
Slew Ring Gear is a precision mechanical component integrating support, rotation and power transmission. It is made of high-strength 42CrMo alloy steel and matched with tooth surface induction hardening process. It can realize micron-level accurate transmission efficiency while bearing thousands of tons of axial and radial loads. It is the core power hub of heavy machinery and automation equipment and supports batch ordering.
Modulus range:
M2-M30
Tooth surface hardness:
HRC50 +
Accuracy class:
P5/P6
Slew Ring Gear Characteristics
Prolonged service life:
the tooth part adopts deep induction hardening treatment, and the effective hardening layer depth reaches 3-5mm, which improves the wear resistance of the tooth part by 45%. Even under the impact condition of frequent starting, the tooth surface peeling or early tooth breakage can be avoided, and the service life can be extended by 3-5 years.
Fatigue strength improvement:
high-quality tempered alloy steel is selected, and its tensile strength can reach more than 980MPa. Compared with ordinary 50Mn material, the fatigue strength is improved by 30%, which effectively solves the problem of matrix deformation of heavy lifting equipment under large overturning torque.
Smooth and vibration-free under high-speed rotation:
the accumulated error of the circumferential section is controlled within 0.03mm through the precision tooth grinding process, and the meshing backlash is accurately adjusted to 0.03 m-0.04m, thus significantly reducing the transmission noise by 15dB and ensuring smooth and vibration-free under high-speed rotation.
Block external debris from invading the raceway:
equipped with high-sealing lip sealing strip to reach IP66 protection grade, strictly block external dust, moisture and debris from invading the raceway, and extend the maintenance period of grease from 100 hours to 500 hours.
Simplify the assembly process of the purchaser:
directly process high-precision bolt holes and positioning pin holes in the inner and outer rings, simplify the assembly process of the purchaser, eliminate the cumulative assembly tolerance of more than 0.1mm brought by the traditional split structure, and greatly improve the operation accuracy of the whole machine.
Solve the local excessive wear caused by uneven meshing:
Before leaving the factory, make a green painting mark on the highest point of gear radial runout, guide the installer to match accurately at the pinion meshing place, and solve the local excessive wear caused by uneven meshing.
Slew Ring Gear Detailed specifications table
| Specifications | Industry standard data/reference range | Technical Advantages |
| Basic Material | 42CrMo / 50Mn | Provides an extremely high balance of fatigue strength and toughness |
| Modulus | 2mm – 30mm (customizable) | Adaptable to drives ranging from precision medical equipment to ultra-heavy-duty cranes |
| Gear Type | Internal teeth, external teeth, or toothless | Flexible adaptation to various hydraulic or electric drive layouts |
| Hardness of raceway quenching | HRC 55 – 62 | Ensure that the raceway does not develop pitting under heavy loads. |
| Gear hardness (hardened by quenching) | HRC 50 – 60 | Greatly improves the compressive strength of the meshing surface of the teeth |
| Run-out tolerance | 0.05mm – 0.15mm | Ensure uniform speed during 360-degree rotation. |
| Operating temperature range | -30°C to +120°C | Adaptable to working environments ranging from extreme cold in polar regions to high temperatures in metallurgical industries |
| Lubrication ports | 4-8 symmetrical distributions | Ensure that the grease evenly covers the entire raceway and gear teeth. |
Slew Ring Gear Comparison Points
Extremely high system rigidity and light weight balance: compared with the split scheme of “bearing + independent gear”, the height of the integrated Slew Ring Gear structure is reduced by 20%, the system rigidity is increased by 1.5 times, and it can carry greater overturning moment in limited installation space.
Long-lasting maintenance-free features: Thanks to the deep hardened raceway and optimized ball/roller arrangement, the dynamic life of the product under rated load is up to 2 million rotations. With the patented sealing technology, the comprehensive operating cost is reduced by more than 30%.
Abnormal transmission noise and abnormal vibration:
through tooth profile modification and high-precision grinding, the pulsation interference during gear meshing is solved, and the operating noise of precision turntable or medical equipment is controlled below 60 decibels.
Risk of tooth breakage under high torque conditions:
For impact loads such as excavators and rotary drilling rigs, the sudden brittle fracture caused by root stress concentration is solved by root strengthening treatment.
High maintenance frequency leads to downtime loss:
for outdoor and industrial and mining environments, the use of grease storage tank optimization design and high-performance sealing, to solve the problem of bearing seizure caused by grease loss.
Slew Ring Gear Applicable crowd
Construction machinery manufacturer (OEM):
It is suitable for excavators, truck cranes and tower cranes to provide core rotation support and high torque power output to ensure the safety of equipment under severe working conditions.
New energy power generation equipment supplier:
used for wind turbine yaw and pitch system, solar automatic tracking bracket, to meet the high reliability, low maintenance operation requirements of up to 20-25 years.
Industrial robots and automation integrators:
for palletizing robots, welding robotic arms and precision rotating worktables, it provides a transmission core with high repetitive positioning accuracy (± 0.01 °) to support precise path control.
Port Machinery and Ship Repairers:
For ship unloaders, portal cranes and ship deck lifting equipment, large-diameter rotating solutions with extremely high corrosion resistance (such as surface galvanizing or special spraying) are provided.
Instructions for use Slew Ring Gear
FAQ and Contact Us
Get a Free Quote Today.
A: The slewing bearing gear not only bears the vertical pressure, but also bears the lateral tilting force more often. Through the calculation of overturning moment, the raceway diameter and the number of balls/rollers can be accurately determined to prevent the risk of overturning during equipment operation.
A: 42CrMo contains chromium and molybdenum elements, and has better hardenability and low temperature toughness. In alpine environment or high frequency vibration conditions, the fatigue life of 42CrMo is about 25%-30% higher than that of 50Mn.
A: Not so. Too high hardness will lead to a decrease in toughness, prone to brittle fracture. We usually control between HRC 50-60 to ensure hardness while retaining the impact toughness of the tooth root.
A: Standard specification products are usually prepared with blanks, and the delivery time is 4-6 weeks. For special modulus or non-standard large diameter customized products, the process includes forging, precision machining and heat treatment, which usually takes 10-14 weeks.
A: First check the lubrication state; secondly check whether the mounting bolts are loose; finally check whether there is foreign matter in the gear meshing gap. If it is a rhythmic percussion, check the tooth surface for indentation or pitting.
A: We can provide phosphating, galvanizing or Dacromet surface treatment, and cooperate with high-grade FKM (fluorine rubber) sealing ring, so that it can maintain excellent structural integrity in the high corrosion environment of sea salt spray.
