SWBTEC
Small Slewing Bearing High Efficiency System
The Small Slewing Bearing, developed for compact machinery, is manufactured from high-strength 42CrMo forged steel and induction hardened. It provides excellent axial, radial and overturning torque load capacity in a limited installation space, and the weight is reduced by 20% compared with the standard model, ensuring high-precision and smooth operation of the equipment and accepting batch orders.
42CrMo / 50Mn
Material standard
55-62 HRC
Raceway hardness
ISO Class 8/AGMA Q8
Gear accuracy
Small Slewing Bearing Features
Micron Rotation Accuracy
The precision grinding process is adopted, the raceway roundness error is controlled within 0.05mm, and the accuracy of ISO 8 gear is matched. Compared with ordinary cast ring gear, the tooth side clearance is reduced by 60%, effectively eliminating the “empty back” and jitter in the rotation process, especially suitable for mechanical arm joints and high-precision turntable applications.
High strength-to-weight ratio lightweight to improve endurance
In view of the strict requirements of small equipment on the self-weight, the thin-walled cross-section design is adopted, and the overall weight is reduced by 25% under the premise that the safety factor of the rated static load is greater than 1.5. Help small excavators and aerial work platforms reduce energy consumption and improve endurance.
Deep induction hardening process to extend service life
The surface of the raceway is treated by medium frequency induction hardening, the depth of the hardened layer is 3mm – 5mm, and the surface hardness is stable at 55-62 HRC. This treatment significantly improves the anti-fatigue spalling ability, and extends the design service life of the product to more than 10 years under frequent start-stop conditions.
NBR double lip seal prevents grease leakage
Equipped with aging-resistant, oil-resistant NBR (nitrile rubber) double-lip sealing strip, the protection level is equivalent to IP65. It can effectively prevent 99% of sand dust and moisture from invading the raceway, prevent grease leakage, and solve the problem of early wear caused by pollution of bearings under harsh outdoor conditions.
42CrMo material ring gear not brittle fracture
The whole system comes standard with 42CrMo tempered steel. Compared with the 50Mn material commonly used in the industry, the tensile strength is increased by 20% and the low temperature impact toughness is better. Even in the extreme cold environment of -30°C, it can ensure that the ring gear does not undergo brittle fracture and ensure the safety of the equipment core.
Response speed of low friction starting torque lifting system
By optimizing the raceway curvature and spacer design, the friction coefficient is reduced to 0.003. This means that the drive motor only needs a smaller starting power to drive the slewing mechanism, which not only reduces the cost of motor selection, but also greatly improves the response speed of the entire slewing system.
Small Slewing Bearing Detailed parameter table
| Parameter item | Technical Data |
| Product Name | Small Slewing Bearing |
| Structural form | Single-row four-point contact ball/ Cross roller |
| Inner diameter range (ID) | 120 mm – 800 mm |
| Outer diameter range (OD) | 200 mm – 1000 mm |
| Main material | 42CrMo (quenched and tempered) / 50Mn |
| Raceway hardness | 55 – 62 HRC (Medium Frequency Induction Hardening) |
| Core hardness | 229 – 269 HB |
| Gear precision grade | ISO Grade 8-10 / AGMA Q8 |
| Sealing material | NBR (Nitrile Butadiene Rubber) / Viton (Fluororubber – Optional) |
| Axial clearance | 0.03mm – 0.15mm (negative clearance preload available) |
| Operating temperature range | -30°C to +80°C |
| Lubrication method | Pre-applied lithium-based extreme pressure grease |
Small Slewing Bearing Comparison Point
For compact equipment that cannot be installed with standard slewing bearings due to space constraints, this product perfectly replaces the bulky traditional models by optimizing the cross-sectional height and load-bearing structure. We address the following industry pain points:
Solve the problem that compact space cannot withstand high overturning moment
Solve the pain point of robot joint rotation accuracy
Solve the problem of seal failure and oil leakage under harsh working conditions
Small Slewing Bearing Applicable crowd
Small construction machinery R & D engineer
Suitable for 1 ton -6 ton small excavator, skid steer loader. This group requires high-strength 42CrMo material to cope with frequent impact loads, and at the same time requires compact component size to adapt to the narrow chassis space.
Industrial Automation and Robot Designers
Suitable for welding robot base, palletizing manipulator joint, automatic turntable. The group’s requirements for Small Slewing Bearing focus on zero backlash, high stiffness and low starting friction torque to achieve high-speed and accurate motion control.
Photovoltaic and new energy system developers
Suitable for solar photovoltaic dual-axis tracking systems. This scenario requires the product to have extremely high weather resistance (UV-resistant sealing) and a design life of up to 25 years, and to maintain a smooth, non-crawling phenomenon at low speeds and heavy loads.
Aerial work platform manufacturer
It is suitable for scissor lift and folding arm aerial work vehicle. This application not only requires the slewing bearing to be light in weight, but also has strict standards for safety (anti-overturning). It is necessary to provide complete static load curve and bolt connection strength check data.
Small Slewing Bearing life and after-sales service
Pre-sales and after-sales service
12 months full shelf life. 3D model download and load curve checking service are provided free of charge before sale; Detailed Installation and Maintenance Manual is provided after sale, and any technical failure or parts replacement demand is responded to within 24 hours.
Expected service life
under normal maintenance and rated conditions, the design service life is 7-10 years. It is recommended to replenish grease every 100 hours and check the bolt preload every 2000 hours to effectively extend the service life.
factory and certificate
certificate
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Small Slewing Bearing High Efficiency System
The Small Slewing Bearing, developed for compact machinery, is manufactured from high-strength 42CrMo forged steel and induction hardened. It provides excellent axial, radial and overturning torque load capacity in a limited installation space, and the weight is reduced by 20% compared with the standard model, ensuring high-precision and smooth operation of the equipment and accepting batch orders.
Material standard
42CrMo / 50Mn
Raceway hardness
55-62 HRC
Gear accuracy
ISO Class 8/AGMA Q8
Small Slewing Bearing Features
Micron Rotation Accuracy
The precision grinding process is adopted, the raceway roundness error is controlled within 0.05mm, and the accuracy of ISO 8 gear is matched. Compared with ordinary cast ring gear, the tooth side clearance is reduced by 60%, effectively eliminating the “empty back” and jitter in the rotation process, especially suitable for mechanical arm joints and high-precision turntable applications.
High strength-to-weight ratio lightweight to improve endurance
In view of the strict requirements of small equipment on the self-weight, the thin-walled cross-section design is adopted, and the overall weight is reduced by 25% under the premise that the safety factor of the rated static load is greater than 1.5. Help small excavators and aerial work platforms reduce energy consumption and improve endurance.
Deep induction hardening process to extend service life
The surface of the raceway is treated by medium frequency induction hardening, the depth of the hardened layer is 3mm – 5mm, and the surface hardness is stable at 55-62 HRC. This treatment significantly improves the anti-fatigue spalling ability, and extends the design service life of the product to more than 10 years under frequent start-stop conditions.
NBR double lip seal prevents grease leakage
Equipped with aging-resistant, oil-resistant NBR (nitrile rubber) double-lip sealing strip, the protection level is equivalent to IP65. It can effectively prevent 99% of sand dust and moisture from invading the raceway, prevent grease leakage, and solve the problem of early wear caused by pollution of bearings under harsh outdoor conditions.
42CrMo material ring gear not brittle fracture
The whole system comes standard with 42CrMo tempered steel. Compared with the 50Mn material commonly used in the industry, the tensile strength is increased by 20% and the low temperature impact toughness is better. Even in the extreme cold environment of -30°C, it can ensure that the ring gear does not undergo brittle fracture and ensure the safety of the equipment core.
Response speed of low friction starting torque lifting system
By optimizing the raceway curvature and spacer design, the friction coefficient is reduced to 0.003. This means that the drive motor only needs a smaller starting power to drive the slewing mechanism, which not only reduces the cost of motor selection, but also greatly improves the response speed of the entire slewing system.
Small Slewing Bearing Detailed parameter table
| Parameter item | Technical Data |
| Product Name | Small Slewing Bearing |
| Structural form | Single-row four-point contact ball/ Cross roller |
| Inner diameter range (ID) | 120 mm – 800 mm |
| Outer diameter range (OD) | 200 mm – 1000 mm |
| Main material | 42CrMo (quenched and tempered) / 50Mn |
| Raceway hardness | 55 – 62 HRC (Medium Frequency Induction Hardening) |
| Core hardness | 229 – 269 HB |
| Gear precision grade | ISO Grade 8-10 / AGMA Q8 |
| Sealing material | NBR (Nitrile Butadiene Rubber) / Viton (Fluororubber – Optional) |
| Axial clearance | 0.03mm – 0.15mm (negative clearance preload available) |
| Operating temperature range | -30°C to +80°C |
| Lubrication method | Pre-applied lithium-based extreme pressure grease |
Small Slewing Bearing Comparison Point
Solve the problem that compact space cannot withstand high overturning moment
Ordinary light bearing is easy to deform and jam when bearing cantilever load. By optimizing the “raceway-steel ball” contact angle (45/60 optional), we have increased the anti-overturning moment capability by 35% at a cross-sectional height of only 50mm, allowing small equipment to stably lift heavy objects.Solve the pain point of robot joint rotation accuracy
The tooth side clearance of the traditional slewing bearing will lead to the positioning deviation of the end of the robot arm. We provide the “negative clearance” preload option, eliminating the mechanical virtual position in the axial and radial directions, ensuring that the equipment does not shake during emergency stop and accurate positioning, and the repeated positioning accuracy reaches 0.1mm.Solve the problem of seal failure and oil leakage under harsh working conditions
Low-end products on the market often use a single layer of inferior glue, easy to age and crack. We use the double lip structure oil-resistant NBR seal, and with the labyrinth dustproof groove design, completely solve the excavator, photovoltaic bracket in the dusty environment due to seal failure caused by raceway wear and oil leakage pollution problems.Small Slewing Bearing Applicable crowd
Small construction machinery R & D engineer
Suitable for 1 ton -6 ton small excavator, skid steer loader. This group requires high-strength 42CrMo material to cope with frequent impact loads, and at the same time requires compact component size to adapt to the narrow chassis space.
Industrial Automation and Robot Designers
Suitable for welding robot base, palletizing manipulator joint, automatic turntable. The group’s requirements for Small Slewing Bearing focus on zero backlash, high stiffness and low starting friction torque to achieve high-speed and accurate motion control.
Photovoltaic and new energy system developers
Suitable for solar photovoltaic dual-axis tracking systems. This scenario requires the product to have extremely high weather resistance (UV-resistant sealing) and a design life of up to 25 years, and to maintain a smooth, non-crawling phenomenon at low speeds and heavy loads.
Aerial work platform manufacturer
It is suitable for scissor lift and folding arm aerial work vehicle. This application not only requires the slewing bearing to be light in weight, but also has strict standards for safety (anti-overturning). It is necessary to provide complete static load curve and bolt connection strength check data.
Small Slewing Bearing life and after-sales service
Pre-sales and after-sales service
Expected service life
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