The SX011868 crossed roller bearing is a large-aperture precision bearing with a 340 mm bore, 420 mm outside diameter and 38 mm width. It is designed for large metrology platforms, antenna positioners, industrial scanners and precision assembly systems.
The bearing provides a dynamic axial load rating of 265 kN, a static axial rating of 1,148 kN, a dynamic radial rating of 167 kN and an approximate mass of 13.5 kg. Its integrated inner ring and circumferentially split outer ring support radial, axial and tilting-moment loads in one compact bearing position.
LYDL can supply SX011868 bearings in P5, P4, P2 or customized accuracy classes. Internal clearance, preload, lubricant and inspection requirements can be selected according to system rigidity, running torque and operating environment.
When replacing an INA/Schaeffler or another brand bearing, provide the complete original designation and suffix. Matching the 340 × 420 × 38 mm dimensions alone does not confirm equivalent clearance, preload, accuracy, coating or load performance.
SX011868 Crossed Roller Bearing Overview
The SX011868 crossed roller bearing is a large-bore precision bearing with dimensions of 340 × 420 × 38 mm. Its approximate mass is 13.5 kg.
An integrated inner ring and circumferentially split outer ring form a compact crossed roller structure. Cylindrical rollers are arranged alternately at 90 degrees, allowing the bearing to support radial loads, axial loads and overturning moments.
The 340 mm through-bore provides substantial space for hollow shafts, optical paths, scanner components, cable groups and rotary service connections. Despite having a 40 mm larger bore than SX011860, the SX011868 retains the same 38 mm bearing width.
This combination makes SX011868 suitable for large rotary systems where available axial space is limited but a wide central passage is essential.
For an overview of other available bore sizes, visit the LYDL SX crossed roller bearing series. Use a clear product photograph showing the 340 mm bore, integrated inner ring and split outer-ring structure. The visible marking should display LYDL SX011868.
The C0r reference value has been corrected to 563 kN from Schaeffler KSX, printed pages 50–51. Confirm the LYDL load rating against the agreed drawing before final selection.
Catalogue load ratings should not be treated as the maximum permissible machine payload. Final selection must consider load direction, overturning moment, shock, acceleration, speed, duty cycle, lubricant and required service life.
Ratings from different manufacturers should not be mixed in one calculation. Dimensionally interchangeable bearings may use different internal geometries, materials and rating methods.
Why Choose the SX011868?
Large 340 mm Through-Bore
The 340 mm opening can accommodate large hollow shafts, optical systems, scanner components, cable bundles or rotary connections.
This reduces the need to route cables and process lines around the outside of the rotating platform.
Large Bore Without Additional Width
SX011868 has the same 38 mm width as SX011860 while increasing the bore from 300 mm to 340 mm.
This is useful when the equipment requires a wider central passage but cannot accept a thicker bearing section.
High Axial Capacity
The bearing provides a dynamic axial rating of 265 kN and a static axial rating of 1,148 kN.
These values make it suitable for large platforms exposed to substantial axial loading and slowly varying overturning moments.
Compact Combined-Load Support
One crossed roller bearing position can support radial, axial and moment loads. This can create a shorter assembly than a conventional arrangement using two separated bearing rows.
Flexible Accuracy Selection
P5, P4, P2 and customized accuracy options are available. The required grade should be selected from the complete system-level runout and positioning requirements.
Main Applications
Large Calibration and Metrology Platforms
SX011868 can support calibration tables, dimensional inspection platforms and large sensor-positioning systems.
The wide bore provides space for measuring equipment, cables and optical components. Platform deflection must be included in the total measurement-error budget.
Satellite Ground Antennas and Radar Positioners
The bearing can support large antenna or radar-positioning structures requiring a central route for power, signal cables or rotary connections.
Wind load, acceleration, cable resistance, moisture and outdoor temperature variation require separate engineering review.
Industrial CT and Optical Scanners
The 340 mm aperture can accommodate scanning paths, detectors, lenses or test components positioned around the rotary axis.
Controlled running torque, low runout and thermal stability are important for maintaining scanning repeatability.
Precision Assembly and Alignment Fixtures
SX011868 can support large fixtures used for precision assembly, alignment, calibration and component testing.
Fixture eccentricity, workpiece mass, acceleration and emergency-stop loads should be included in the bearing calculation. Combine four realistic application scenes with concise English labels:
Metrology Platform
Antenna Positioner
Industrial CT Scanner
Precision Assembly
Use consistent industrial lighting and natural colors. Avoid unrealistic futuristic machinery or exaggerated bearing dimensions.
The SX011860 crossed roller bearing is more compact when a 300 mm through-bore is sufficient.
The SX011880 crossed roller bearing should be considered when the application requires a 400 mm bore or a substantial increase in load capacity.
SX011868 provides an intermediate solution with a 340 mm bore, 420 mm outside diameter and the same 38 mm width as SX011860.
Accuracy and System-Level Performance
LYDL can supply SX011868 in P5, P4, P2 or customized accuracy classes.
P5 is suitable for many industrial positioning systems. P4 or P2 may be selected for metrology, scanning and calibration equipment with more demanding runout requirements.
Final system accuracy also depends on:
Shaft and housing geometry
Mounting-face flatness
Flange parallelism
Platform rigidity
Clamping deformation
Drive eccentricity
Encoder installation
Payload deflection
Thermal expansion
A high-accuracy bearing cannot compensate for a flexible or incorrectly machined supporting structure.
Internal Clearance and Preload
An internal-clearance configuration generally provides lower friction torque and greater tolerance of mounting variation.
Controlled preload can increase moment rigidity, improve reversal accuracy and reduce platform settling time. It may be preferred for large scanners and precision metrology equipment.
Excessive preload can increase starting torque, temperature and sensitivity to housing deformation. The required condition should be selected together with the motor, lubricant and mounting fits.
For large positioning systems, specify permissible starting torque, running torque and torque variation in addition to geometric accuracy.
Suffix and Designation Explanation
Suffixes may identify internal clearance, preload, coating, accuracy or design generation. Their meanings are manufacturer-specific.
Examples in Schaeffler technical documentation include:
RL0: reduced internal clearance
VSP: defined preload
RR: Corrotect-coated configuration
A: may identify a particular design generation
An SX011868-A-VSP should not automatically be replaced by an unsuffixed SX011868. The original suffix and technical requirements must be reviewed.
Replacement and Interchangeability
SX011868 and LRC 34038 may be used as dimensional interchange references. Functional interchangeability requires additional verification.
Confirm:
Complete original designation and suffix
Bore, outside diameter and width
Dimensional tolerances
Accuracy and runout
Internal clearance or preload
Starting and running torque
Axial and radial load ratings
Lubricant
Material and heat treatment
Coating or corrosion protection
Inspection and traceability documents
LYDL can review the original label, drawing, catalogue data or inspection report before confirming replacement feasibility.
Third-party trademarks are used only for technical identification and comparison. Their use does not imply authorization, affiliation or original-brand manufacture.
Mounting and Flange Design
The split outer ring requires continuous and uniform retention. It should be clamped by a sufficiently rigid housing cover or flange.
A reference adjacent construction may use 24 × M16 flange screws. This does not mean the bearing itself contains 24 mounting holes.
The final screw size, quantity, strength class and tightening torque must be calculated for the actual mounting structure and external loads.
Both mounting surfaces should be flat, parallel, clean and free from burrs. Uneven clamping can distort the raceways and increase rotational torque.
Tighten the flange screws gradually in a diagonal sequence. Rotate the bearing during tightening and monitor starting or running torque.
Retaining rings locate the bearing but should not be treated as the primary structural load path.
Handling the 13.5 kg Bearing
SX011868 weighs approximately 13.5 kg and should be handled using an appropriate lifting method.
Support the complete circumference evenly. Do not lift the bearing by only one section of the split outer ring.
Keep the bearing in its original protective packaging until the installation area is clean and ready. Protect it from impact, contamination and accidental ring separation.
Installation force should be applied uniformly to the appropriate ring. Do not strike the bearing directly.
Lubrication and External Sealing
The standard SX011868 is open and does not contain integral seals. External protection is required where dust, coolant, water or other contamination may reach the raceways.
Select grease according to speed, load, oscillation angle, operating temperature and maintenance interval.
Avoid excessive grease filling because it may increase rotational torque and temperature. Large scanners and metrology systems may also require low-noise or low-particle lubricant.
Outdoor antenna applications may require moisture sealing, corrosion protection and a lubricant suitable for seasonal temperature variation.
LYDL Manufacturing and Quality Control
LYDL can manufacture SX011868 bearings using GCr15 or GCr15SiMn bearing steel. Accuracy, clearance, preload, lubricant and marking can be configured according to customer requirements.
Production and inspection may include:
Raw-material verification
Precision turning
Heat treatment and cryogenic stabilization
Raceway grinding and superfinishing
Roller manufacturing and optical sorting
Precision dimensional measurement
Deep cleaning and demagnetization
Controlled preload assembly
Starting and running-torque testing
Radial and axial runout inspection
Final visual inspection
Laser marking
Rust prevention
Inspection items and acceptance limits should be agreed before production.
Inspection Documents and Export Packaging
Available documentation may include:
Material certificate
Hardness report
Dimensional inspection report
Radial and axial runout report
Starting or running-torque record
Clearance or preload record
Individual traceability information
Packaging photographs
Individual anti-rust protection, protective wrapping, shock-resistant material and reinforced export packaging can be provided.
Additional moisture protection and lifting labels should be specified for sea freight or long-term storage. Use real inspection and packaging photographs. The bearing marking, individual box label and export-case information should consistently display SX011868.
These sources provide general engineering and comparison information. Final SX011868 selection should be based on the confirmed LYDL specification, operating conditions and approved drawing.
Information Required for an Accurate Quotation
Please provide:
Required quantity
Complete designation and suffix
Required accuracy class
Clearance or preload requirement
Radial and axial loads
Tilting moment or payload offset
Maximum speed
Operating cycle
Operating temperature
Housing and shaft materials
Lubrication and sealing requirements
Corrosion-protection requirements
Inspection-document requirements
Delivery destination and required date
Frequently Asked Questions
1. When should SX011868 be selected instead of SX011860?
SX011868 should be considered when the application requires a 340 mm bore. It provides a 40 mm larger opening while retaining the same 38 mm bearing width.
2. Why does SX011868 have the same width as SX011860?
Both models use a 38 mm section, but SX011868 has larger inner and outer diameters. This allows a wider passage without increasing axial installation height.
3. Can the outer ring be used as the rotating ring?
The integrated inner ring is commonly selected as the rotating ring. Outer-ring rotation requires a detailed review of clamping, housing accuracy, split-ring retention and load conditions.
4. How should a large metrology platform be evaluated?
Include the platform mass, fixture, payload, center-of-gravity offset, acceleration and flange deformation. Bearing runout is only one part of the total measurement error.
5. Is SX011868 suitable for an outdoor antenna positioner?
It can be suitable if wind loads, moisture sealing, corrosion protection, lubricant and temperature range are properly addressed.
6. Do the outer-ring retaining elements support the working load?
No. They hold the split ring together for handling and assembly. The rigid housing flange must provide the structural support.
7. Why must load ratings be confirmed when replacing another brand?
Manufacturers may use different internal geometries, materials and rating methods. Identical dimensions do not guarantee identical load ratings or service life.
8. When should SX011880 be selected?
SX011880 should be considered when a 400 mm bore or a substantial increase in axial and radial capacity is required and the 500 mm outside diameter is acceptable.
Request an SX011868 Quotation
Send LYDL your complete SX011868 designation, quantity, required accuracy, preload or clearance and operating conditions.
You can contact LYDL for SX011868 pricing and technical support to request drawings, inspection documents, application review and export-delivery information.
Combine four realistic application scenes with concise English labels:
Use real inspection and packaging photographs. The bearing marking, individual box label and export-case information should consistently display SX011868.