Structure: RE Cross Roller Bearing features a split inner ring and a one-piece outer ring. It is particularly suitable for applications requiring accurate outer-ring rotation.
Size Range: The standard RE reference range covers bore diameters of 20–600 mm, outside diameters of 36–700 mm and widths of 8–50 mm.
Performance: Crossed cylindrical rollers support radial loads, axial loads in both directions and overturning moments within one compact bearing.
Material: GCr15, GCr15SiMn or 100Cr6 bearing steel, according to the confirmed specification.
Configuration: P5, P4 and P2 accuracy options; open or sealed designs; specified clearance or preload. Availability and acceptance limits are confirmed with LYDL before ordering.
RE Cross Roller Bearing Structure Diagram
RE series construction and mounting reference: split inner ring, one-piece outer ring, with open and sealed configurations.
RE Series Model Database
The tables cover 48 standard RE base models, from RE2008 to RE60040. RE-H, REV and custom designs require separate specifications.
Data basis: THK Cross-Roller Ring catalogue, 515-1E, pages A18-27–A18-29. These are catalogue reference values for preliminary comparison. LYDL supply dimensions, mounting details, load ratings and availability must be confirmed against the approved LYDL drawing. THK RE model reference.
Symbols: d = bore; D = outside diameter; B = width; dp = roller pitch circle diameter; ds (max.) and Dh (min.) = catalogue mounting shoulder limits. C and C₀ are basic dynamic and static radial load ratings. Dimensions are in mm, ratings in kN and approximate mass in kg.
Selection note: C and C₀ are calculation references, not allowable machine payloads or moment ratings. Evaluate combined loads, required life and static safety. Shaft and housing fits, chamfers, lubrication holes and flange details require a model-specific drawing.
Product Overview
The RE Cross Roller Bearing uses a two-piece inner ring and a one-piece outer ring. It is normally selected when outer-ring rotational accuracy is the priority, commonly with the inner ring fixed to the supporting shaft.
Adjacent cylindrical rollers have perpendicular axes. This arrangement supports radial force, axial force in either direction and overturning moment in one bearing. The RE series forms part of LYDL’s Cross Roller Bearings range.
Structural Features
Split Inner Ring Design
The inner ring consists of two matched sections. Keep these sections together during handling and follow the specified retention arrangement during installation.
Integrated Outer Ring
The one-piece outer ring provides a continuous ring structure for applications prioritising outer-ring rotation accuracy. Installed runout also depends on the shaft, housing and flange.
Crossed Roller Arrangement
Alternating rollers support combined loads. Standard RE designs use spacers between adjacent rollers to reduce direct roller contact and help control friction.
Precision Positioning Capability
Selected clearance or preload helps balance rigidity and running torque. Preload, mounting deformation and operating temperature must be considered together.
Request a Quote or Technical Review
Need an RE model or a replacement check? Send the model, quantity and drawing, together with the rotating ring, loads, speed and required accuracy. Request an RE Bearing Quote · Email LYDL
Difference Between RE and Other Series
Series
Ring structure
Main selection consideration
RE
Split inner ring; one-piece outer ring
Outer-ring rotational accuracy; shaft, housing and flange arrangement
One-piece inner and outer rings with mounting holes
Direct mounting and the required accuracy of the rotating ring
THK describes the RE, RB and RU structures in its cross-roller ring product information. Application names alone do not determine which series is suitable.
When comparing RE with XU, XA, XV or XSU, review the exact model’s ring structure, mounting holes, retention method, preload arrangement and load data. Series names alone do not establish interchangeability or a universal rigidity ranking.
RE and RB Model Comparison Links
The following RE/RB pairs share nominal bore, outside diameter and width. Their ring structures differ. Use the linked RB pages when evaluating inner-ring rotation; verify shoulder dimensions and the complete mounting arrangement before changing series.
Crossed cylindrical roller bearing / cross-roller ring
Ring structure
Split inner ring and one-piece outer ring
Preferred accuracy application
Outer-ring rotation
Standard reference dimensions
d: 20–600 mm; D: 36–700 mm; B: 8–50 mm
Load support
Radial, bidirectional axial and overturning moment loads
Mounting
Shaft, housing and retaining flanges; standard RE has no integral mounting-hole pattern
Material options
GCr15, GCr15SiMn or 100Cr6, according to the agreed material specification
Accuracy options
P5, P4 or P2 requirements, subject to confirmed runout and dimensional limits
Sealing
Open, single-sided or double-sided sealing, subject to model availability
Clearance / preload
Agreed numerical clearance or preload range
Lubrication
Grease selected for load, speed, temperature and environment
Operating temperature / speed
Confirmed for the specified material, seals, lubricant and duty cycle
Customisation
Dimensions, lubrication, marking, packaging and inspection requirements by agreement
Model Designations and Suffixes
Code
Meaning in the THK RE designation system
RE
Standard RE base model
U / UU
Seal on one side / seals on both sides; specify the side for U
CC0
Negative clearance / preload
C0
Positive clearance; it does not mean zero clearance
C1
Positive clearance category larger than C0
P5 / P4 / P2
Rotational accuracy grades; dimensional accuracy must also be specified
Example: RE12025UUCC0P4 describes an RE12025 with seals on both sides, a preload specification and P4 rotational accuracy in this naming convention. Confirm the LYDL order code and numerical acceptance limits; suffix meanings are not universal across manufacturers. THK model number coding.
Earlier LYDL tables used the LRE prefix. Include the full existing marking or drawing when requesting a replacement.
Typical Applications
Application
What to check when selecting RE
Rotary and indexing tables
Outer-ring rotation, workpiece offset and overturning moment
Robot rotary axes and positioners
Reversing loads, acceleration and mounting rigidity
Optical inspection and measuring equipment
Radial / axial runout, starting torque and repeatability
Semiconductor and precision automation equipment
Lubricant suitability, cleanliness and duty cycle
Key Advantages
One-piece outer ring for precision outer-ring rotary assemblies.
Combined load support within a compact bearing envelope.
A broad model range for bore, section and capacity comparison.
Configurable accuracy, clearance, seals and lubrication to suit the application.
Quality Assurance
Inspection scope is agreed with the order. Relevant checks include dimensions, outer-ring runout, clearance or preload, starting and running torque, rotation smoothness, hardness and marking.
Request the required material documentation and inspection reports before order confirmation. Acceptance criteria should identify the measured surfaces and numerical limits.
Manufacturing Process
The production route is adapted to the agreed bearing specification:
Incoming material inspection
Precision turning
Heat treatment
Raceway grinding
Raceway superfinishing
Roller preparation and sorting
Component measurement
Cleaning and demagnetisation
Controlled-cleanliness assembly
Clearance or preload setting
Torque verification
Final inspection
Laser marking
Corrosion protection
Protective packaging
Dispatch
Packaging & Shipping
Standard Packaging
Packaging is selected for bearing size and transport conditions. It can include corrosion protection, sealed protective wrapping, cushioning and individual cartons. Larger bearings or consolidated shipments may require plywood cases.
Shipping Options
Courier, air freight and sea freight can be arranged according to destination and shipment size. Confirm the transport method, delivery terms and lead time with the quotation.
Installation & Maintenance
Installation Recommendations
Clean the shaft, housing, bearing seats and flanges; remove burrs.
Verify fits, shoulder limits and chamfer clearance against the approved drawing.
Keep the two inner-ring sections correctly matched and supported.
Apply fitting force to the ring being installed without transmitting it through the rollers.
Tighten flange bolts progressively in a diagonal sequence using the specified torque.
Check outer-ring runout, running torque and rotation smoothness after assembly.
Ring-retaining screws used to keep a bearing together are not substitutes for structural mounting fasteners. Follow the model-specific installation instructions. THK assembly guidance.
Maintenance Guidelines
Monitor lubrication, contamination, temperature, noise and changes in running torque. Set relubrication intervals for the actual duty cycle. Do not mix incompatible greases or attempt to reset factory preload without the manufacturer’s procedure.
Frequently Asked Questions
1. Which ring normally rotates in an RE bearing?
RE is normally selected for accurate outer-ring rotation, with the split inner ring fixed. This is a selection preference; other operating arrangements require a review of the required accuracy and mounting conditions.
2. Can an RE bearing directly replace an RB bearing of the same size?
Matching d × D × B dimensions are only the first check. RE and RB split different rings, and their shoulder dimensions, retention arrangements and specified rotational accuracy can differ. Confirm both drawings before replacement.
3. Does C0 mean zero clearance?
No. In THK’s RE naming system, C0 is positive clearance, CC0 indicates preload, and C1 is a larger positive-clearance category. Specify the numerical requirement for a LYDL order.
4. Can the load table be used directly as a machine payload limit?
No. The table lists basic radial ratings. Application selection must also consider axial load, overturning moment, duty cycle, static safety and required bearing life.
5. Can a standard RE bearing be mounted directly through its rings?
Standard RE does not have the integral mounting-hole arrangement used by RU. It normally requires a suitable shaft, housing and retaining flanges. Any retaining screws shown on an RE drawing must be identified separately from machine mounting bolts.
6. Does a P2 suffix guarantee P2 tolerances for every dimension?
No. In THK’s RE designation system, P2 specifies rotational accuracy. Dimensional accuracy and the controlled surfaces must be stated separately. Agree the complete inspection limits for the LYDL bearing before ordering.
Need High-Performance Cross Roller Bearings?
Send LYDL your full bearing designation or drawing, quantity, rotating ring, radial and axial loads, overturning moment, speed and required life. Include accuracy, preload, seal, lubricant and delivery requirements for a practical quotation. Request a Drawing and Quotation · sales@luoyangdeeplink.com
Engineering Standards and References
Brand catalogues support model identification and technical comparison. The standards below provide relevant calculation or tolerance frameworks; their applicability must be checked for the specified design. LYDL’s approved drawing and agreed inspection criteria govern the supplied product. Brand references do not imply affiliation or automatic interchangeability.
RE series construction and mounting reference: split inner ring, one-piece outer ring, with open and sealed configurations.