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SLEWING RING OVERVIEW & SELECTION GUIDE
Exemplifying precision and ingenuity, Silverthin Slewing Ring Bearings redefine engineering excellence. Departing from the ordinary, these exceptional components usher in a spectrum of features uniquely tailored to the world of slewing rings. With an unwavering focus on weight reduction, space optimization, and friction minimization, our Slewing Ring Bearings set new standards for efficiency.
Thriving under the most demanding conditions, our Slewing Ring Bearings excel in the face of demanding challenges, consistently surpassing industry expectations. Demonstrating their prowess in industrial equipment, cranes, medical systems, robotics, semiconductors, renewable energy and other demanding applications.
Our Slewing Rings showcase a diverse range of options for your application encompassing various materials, mounting holes configurations, cross-sectional profiles, clearances, special corrosion-resistant coatings, lubricants and more, all highlighting the customizable nature of our products. The pinnacle of our effort is our ability to craft tailored solutions, shaping Slewing Ring Bearings to your exact performance requirements.
Embark on the journey of innovation and excellence, exploring the realm of Silverthin Slewing Ring Bearings where limits are redefined, and possibilities are reshaped. With every turn, our slewing ring bearings drive transformation, propelling your designs into new dimensions of success.
Explore Silvethin where limits are redefined, and possibilities are reshaped.
Slewing Ring Bearing Types
Rectangular Standard Capacity Slewing Ring
STO & STE Series
Silverthin™ Slewing Ring Bearings are designed to accommodate significant radial, thrust and moment loads with options for non-gear or external gear. rectangular 4-point contact slewing ring offers several benefits due to its design. It provides improved load distribution, higher load-carrying capacity, and enhanced stability compared to other slewing ring configurations.
The four-point contact design allows for higher radial, axial, and moment load capacities while maintaining a relatively compact size. This is accomplished in most cases by the unique four point contact raceway geometry, which is similar in concept to Silverthin™ X-Type Thin Section bearings. This type of slewing ring is suitable for applications that require smooth rotation, precise positioning, and the ability to handle heavy loads without sacrificing performance.
| Moment | Thrust | Radial |
|---|---|---|
| 900,000 ft-lbs to 980,000 ft-lbs | 1,150,000 ft-lbs to 1,380,000 ft-lbs | 250,000 lbs to 250,000 lbs |
STO Non-Gear Series
- Rectangular cross-section
- Four-point contact ball
- Non-gear
- Double Sealed
- Clearance
- Dimensions up to 72” OD
- STO Part Numbers
STE External Gear Series
- Rectangular cross-section
- Four-point contact ball
- External gear, AGMA 8 quality minimum
- Double Sealed
- Clearance
- Dimensions up to 72” OD
- STE Part Numbers
Rectangular High Capacity Slewing Rings
STO-X & STE-X Series
The Silverthin rectangular high capacity slewing ring boasts several features that make it a versatile choice for various high capacity applications. Its design includes a larger ball diameter and optimized internal structure. This results in higher load-carrying capacity, improved stiffness, and greater durability.
The benefits include the ability to handle heavier loads, increased stability during operation, reduced wear and tear, and extended service life. This makes the rectangular high capacity slewing ring ideal for demanding industries such as construction, heavy equipment, and wind energy, where reliability and performance are crucial.
| Moment | Thrust | Radial |
|---|---|---|
| 10,000,000 ft-lbs | 6,000,000 lbs | 1,300,000 lbs |
STO-X Non-Gear Series
- Rectangular cross-section
- Four-point contact ball
- Larger ball diameter
- Optimized internal structure
- Non-gear
- Double Sealed
- Clearance
- Dimensions up to 72” OD
- STO-X Part Numbers
STE-X External Gear Series
- Rectangular cross-section
- Four-point contact ball
- Larger ball diameter
- Optimized internal structure
- External gear, AGMA 8 quality minimum
- Double Sealed
- Clearance
- Dimensions up to 72” OD
- STE-X Part Numbers
Flanged Slewing Ring
SK6 Series
The Silverthin SK6 Flanged Slewing Ring Bearings simplify mounting, enhance load distribution, and offer controlled rotation options. The inclusion of gears, whether internal or external, adds the ability to transmit power efficiently, making these designs valuable across a wide range of industries and applications.
Flanged Slewing Ring Bearings come in non-gear, internal gear and external gear configurations that allow a single bearing to accommodate all three loading scenarios moment, thrust and radial. This is accomplished in most cases by the unique four point contact raceway geometry, which is similar in concept to Silverthin™ X-Type Thin Section bearings.
| Moment | Thrust | Radial |
|---|---|---|
| 141,000 ft-lbs to 180,000 ft-lb | 175,000 ft-lbs to 223,000 ft-lbs | 35,000 lbs to 45,000 lbs |
Flanged SK6 PZ Non-Gear
- Flanged cross-section
- Four-point contact ball
- Non-gear
- Double Sealed
- Clearance
- Dimensions up to 60″ OD
- SK6-PZ Part Numbers
Flanged SK6 NZ Internal Gear
- Flanged cross-section on outer ring
- Four-point contact ball
- Internal gear, AGMA 8 quality minimum
- Double Sealed
- Clearance
- Dimensions up to 60″ OD
- SK6-NZ Part Numbers
Flanged SK6 EZ External Gear
- Flanged cross-section on inner ring
- Four-point contact ball
- External gear, AGMA 8 quality minimum
- Double Sealed
- Clearance
- Dimensions up to 60″ OD
- SK6-EZ Part Numbers
Pinions
Silverthin provides standard, high quality mating pinions from stock for our STE and SK6 series slewing ring bearings. These pinions are made to AISI 4140 steel and are hardened to have a surface hardness of 55-60 HRC. Explore Silverthin mating pinions and pinion/gear backlash for the STE and SK6 slewing rings below:
Silverthin Custom Slewing Ring Bearings
In addition to our standard slewing ring configurations Silverthin™ offers a wide range of custom options for specialty applications. Custom slewing rings can be modified versions of standard slewing ring bearings, or completely custom. Customizations include but are not limited to:
- Special overall dimensions (bore, OD, widths, offsets)
- Lube holes and grease fittings (additions, subtractions, locations, face mounted, recessed, sizes)
- Special gear geometries and hardness
- Internal geometry optimization (increased load capacity, increased precision for runouts)
- Internal fit (preload or clearance)
- Hole patterns and configurations, such as:
- Locating holes, pins or pilots
- Special sealing configurations (BUNA, PTFE)
- Accommodate higher speeds or continuous operation (add separator)
- Pinions
- Lubricants
- Solid Lubricant
- Stainless Steel (ZERKS, BALLS)
- NTDC (NO GEARS)
- XADC (GEARS)
- Black Phosphorus
