SWBTEC
Roller Slewing Ring
Compare high-precision crossed-roller, standard crossed-roller, and three-row roller designs by combined-load capacity, rigidity, positioning accuracy, gear arrangement, and available installation envelope. Provide load, motion, mounting, gear, environment, and quantity data to receive a drawing-based configuration and quotation. Control mounting, bolting, sealing, and lubrication to protect service life.
Roller Slewing Ring
Choose the Roller Arrangement by Load, Stiffness and Accuracy
Product ListAll three families support combined axial, radial, and overturning-moment loads in one rotating assembly. The correct first choice depends on how load, stiffness, positioning accuracy, deflection, and installation space are prioritized.
| Configuration | Primary advantage | Tradeoff to check | Typical fit |
|---|---|---|---|
| High-precision crossed roller | High rigidity and controlled runout for positioning | Confirm preload or clearance, mounting accuracy, and low-friction requirement | Robots, machine tools, and medical positioning |
| Crossed roller | Compact combined-load support with strong rotational stiffness | Check duty cycle, partial loading, wear, and the required gear arrangement | Rotary tables and compact industrial machinery |
| Three-row roller | Separated load paths for very high capacity and low deflection | Allow for a larger section, heavier support structure, and installation handling | Cranes, excavators, ports, and heavy mills |
Use the high-precision design for controlled positioning, the standard crossed-roller design for compact rigid duty, and the three-row design when maximum load capacity is the leading constraint. Final approval still requires the actual load spectrum and mounting drawing.
Prepare an RFQ That Can Be Sized and Quoted
Product ListA complete inquiry links the load case to the mechanical interface, environment, and delivery requirement. Send a drawing when the bearing must replace an existing ring or match fixed bolt and gear geometry.
Loads and motion
Maximum and operating axial and radial loads, overturning moment, shock factor, speed, motion profile, duty cycle, target life, and any simultaneous load combinations.
Envelope and mounting
Bore, outside diameter, overall height, bolt circles, hole sizes, fits, available support stiffness, mounting orientation, and allowable mass.
Gear and accuracy
Internal, external, or no gear; module or diametral pitch, tooth count, pressure angle, backlash, gear quality, runout, clearance or preload, and rotation torque.
Environment and delivery
Temperature, contamination, corrosion, seals, lubricant, grease access, quantity, destination, required drawings, inspection records, and third-party witness needs.
Protect Accuracy and Service Life at Installation
Product ListA correctly sized bearing can still rotate poorly if the support distorts the rings. Use rigid, clean, flat mounting faces and verify that welding, machining, lifting, and tightening do not introduce local deformation.
Use the specified fastener grade and tighten in a controlled cross pattern to the approved preload. After mounting, check rotation torque, axial and radial runout, gear backlash, and tooth contact through the full rotation before applying production load.
Protect seals during handling, keep grease passages accessible, and set a relubrication interval from the actual duty and environment. Shorten the interval for water, dust, shock, long idle storage, or oscillation that does not redistribute grease around the raceway.
Compare Roller Slewing Ring Products for the Actual Duty
Crossed-roller designs concentrate stiffness and positioning performance in a compact ring, while a three-row roller design separates load paths for higher capacity and lower deflection. Final selection depends on the load spectrum, envelope, gear, accuracy, mounting, sealing, and lubrication plan.
High Precision Cross Roller Slewing Bearing — Roller Slewing Ring
Use where positioning accuracy, compact rigidity, and repeatable low-speed rotation take priority.
- Application / fitIndustrial robots, precision machine tools, and medical positioning
- Size / performance rangeRunout ≤0.005 mm (≤0.00020 in); catalog bore 40–800 mm (1.57–31.50 in)
- MaterialGCr15SiMn rollers with alloy-steel rings
- InterfaceRU, XSU, or CRBC formats; clearance or preload to drawing
Three Row Roller Slewing Bearing — Roller Slewing Ring
Choose for large equipment where axial, radial, and overturning loads dominate the decision.
- Application / fitCranes, excavators, port equipment, and heavy mill equipment
- Size / performance rangeListed outside diameter from 634 mm (24.96 in); three separated load paths
- MaterialHigh-strength alloy-steel rings and hardened roller raceways
- InterfaceNo gear, external gear, or internal gear; through or threaded holes
Cross Roller Slewing Bearing — Roller Slewing Ring
A balanced option for compact machinery that needs combined-load capacity and rotational stiffness.
- Application / fitRotary tables, agricultural machinery, and compact heavy-duty rotation
- Size / performance rangeListed outside diameter from 602 mm (23.70 in); combined axial, radial, and moment loads
- Material42CrMo or C45 ring options with GCr15-class rollers
- InterfaceNo gear, external gear, or internal gear; M16 and M20 examples
Define Quantity, Lead Time, and Documents Before Ordering
Roller slewing rings are quoted by model, dimensions, gear, accuracy, and inspection scope. The final signed quotation controls price and delivery.
MOQ 1 where feasible. Price is quoted by model and size; standard lead time is typically 15–30 days after drawing approval.
Drawing approval comes before production. Inspection points, price basis, and export packing are defined in the offer.
Negotiated quantity breaks and blanket or scheduled orders are available by agreement, with replenishment timing fixed in the contract.
Standard configurations typically require 15–30 days after drawing approval; engineered custom orders typically require 30–45 days.
EXW, FOB, CIF, or DAP can be quoted with sea, air, or express freight. Destination restrictions are confirmed before order.
2D/3D drawings, invoice, packing list, and agreed dimensional, hardness, gear, or raceway records; material certificates and third-party inspection by agreement.
Have a Drawing or Unusual Duty? Send the Interface First.
Send the mating drawing and duty cycle so the bearing, gear, holes, seals, grease positions, clearance or preload, and accuracy can be reviewed together.
Useful drawing inputs
- Mating envelope and bolt circles
- Gear geometry and drive position
- Load combinations, speed, and duty cycle
- Accuracy, clearance or preload, seals, and lubrication
Questions Buyers Ask Before Ordering
Use these answers to prepare the technical and commercial information that affects fit, interchange, documentation, and handling.
What load data is needed to size a roller slewing ring?
Provide maximum and operating axial load, radial load, overturning moment, shock factor, speed, duty cycle, target life, and the load combinations that occur together. A drawing review then checks capacity and mounting stiffness.
Should I specify an internal gear, external gear, or no gear?
Select the arrangement from drive location, available envelope, pinion access, ratio, lubrication, guarding, and maintenance needs. Include module or diametral pitch, tooth count, pressure angle, quality requirement, and backlash target when a gear is required.
Can slewbearingtec cross-reference an existing bearing?
Yes. Send the old drawing or nameplate together with bore, outside diameter, height, bolt circles, hole sizes, gear data, accuracy or clearance, seals, grease points, and actual duty. Do not rely on outside diameter alone for interchange.
Which drawings and inspection records can be supplied?
2D and 3D drawings can be prepared for review. Dimensional, hardness, gear, and raceway inspection records can be defined in the quotation; material certificates or third-party inspection are available when agreed before order.
How should a bearing be shipped and stored before installation?
Keep the ring horizontal on a rigid support, preserve corrosion protection, protect seals and gear teeth, and avoid impact or unsupported lifting. Confirm long-term storage protection and lifting points in the packing plan before shipment.
Send the Load Case, Drawing, and Quantity
Send the load case, installation envelope, gear requirement, operating environment, target life, and quantity for a drawing-based recommendation.
- Phone: +86 5634113031
- Email: [email protected]
- WhatsApp: +86-18098501069
- Address: Ningguo Dadao, Ningguo Economic Development Zone, Ningguo, Xuancheng, Anhui, China
