RE Series
Two-Piece Inner Ring Crossed Roller Bearings
20–600mm Bore | Integral Outer Ring | Two-Piece Inner Ring | P5/P4/P2 Grade
The RE series features an integral (one-piece) outer ring with a two-piece (split) inner ring — the inverse of the RB series. This design is specifically optimized for applications where the outer ring is the rotating element and outer ring rotation accuracy is the primary performance requirement.
Crossed Roller Bearings Optimized for Outer Ring Rotation Applications
Luoyang Songju RE series crossed roller bearings feature an integral one-piece outer ring and a two-piece (split) inner ring — the structural inverse of the RB series. This design provides the most stable, accurate reference surface on the outer ring, making RE bearings the optimal choice when outer ring rotational accuracy is the primary requirement.
The RE series shares the same overall mounting dimensions (bore × OD × width) as the RB series, enabling direct substitution in existing designs. The key difference is which ring is split: RB splits the outer ring (for inner ring rotation accuracy), RE splits the inner ring (for outer ring rotation accuracy). This interchangeability gives designers flexibility without changing housing or shaft dimensions.
Standard RE bearings feature four grease lubrication holes in the outer ring for convenient relubrication access. Available in P5, P4, and P2 precision grades from GCr15 bearing steel. Open type (standard) and sealed type (suffix UU, single or double seal) configurations. The full complement design maximizes load capacity for demanding applications.
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RE Series — Two-Piece Inner Ring Crossed Roller Bearing Model Parameters
Representative model list for RE series crossed roller bearings. Same mounting dimensions as RB series. Full model range extends from RE 2008 to RE 60040. Contact engineering for complete catalog.
| Bearing Model | d (mm) | D (mm) | B (mm) | Cr (kN) | C0r (kN) | Mass (kg) |
|---|---|---|---|---|---|---|
| RE 2008 | 20 | 36 | 8 | 3.23 | 3.1 | 0.04 |
| RE 3010 | 30 | 55 | 10 | 7.35 | 8.36 | 0.12 |
| RE 4010 | 40 | 65 | 10 | 8.33 | 10.6 | 0.16 |
| RE 5013 | 50 | 80 | 13 | 16.7 | 20.9 | 0.27 |
| RE 6013 | 60 | 90 | 13 | 18.0 | 24.3 | 0.3 |
| RE 7013 | 70 | 100 | 13 | 19.4 | 27.7 | 0.35 |
| RE 8016 | 80 | 120 | 16 | 30.1 | 42.1 | 0.7 |
| RE 9016 | 90 | 130 | 16 | 31.4 | 45.3 | 0.75 |
| RE 10020 | 100 | 150 | 20 | 33.1 | 50.9 | 1.45 |
| RE 11020 | 110 | 160 | 20 | 34.0 | 54.0 | 1.56 |
| RE 12025 | 120 | 180 | 25 | 66.9 | 100.0 | 2.62 |
| RE 13025 | 130 | 190 | 25 | 69.5 | 107.0 | 2.82 |
| RE 14025 | 140 | 200 | 25 | 74.8 | 121.0 | 2.96 |
| RE 15025 | 150 | 210 | 25 | 76.8 | 128.0 | 3.16 |
| RE 15030 | 150 | 230 | 30 | 100.0 | 156.0 | 5.3 |
| RE 20025 | 200 | 260 | 25 | 84.2 | 157.0 | 4.0 |
| RE 20030 | 200 | 280 | 30 | 114.0 | 200.0 | 6.7 |
| RE 20035 | 200 | 295 | 35 | 151.0 | 252.0 | 9.6 |
| RE 25025 | 250 | 310 | 25 | 69.3 | 150.0 | 5.0 |
| RE 25040 | 250 | 355 | 40 | 195.0 | 348.0 | 14.8 |
| RE 30025 | 300 | 360 | 25 | 75.5 | 178.0 | 5.9 |
| RE 30035 | 300 | 395 | 35 | 183.0 | 367.0 | 13.4 |
| RE 40040 | 400 | 510 | 40 | 241.0 | 531.0 | 23.5 |
| RE 50040 | 500 | 600 | 40 | 239.0 | 607.0 | 26.0 |
| RE 60040 | 600 | 700 | 40 | 264.0 | 721.0 | 29.0 |
All models available in P5, P4, and P2 precision grades. Same mounting dimensions as RB series. Standard: GCr15 bearing steel, full complement. Four grease holes standard. Suffix UU = sealed. THK equivalent: RE series. Contact engineering for complete size range.
Why Choose Luoyang Songju RE Series Crossed Roller Bearings
Optimized for outer ring rotation — same dimensions as RB, inverse ring configuration
Optimized for Outer Ring Rotation
The integral (one-piece) outer ring provides the most stable, accurate rotating reference surface when the outer ring is the driven element. Ideal for hollow-shaft rotary tables, direct-drive turntables, and applications where the central bore must remain clear for cable or fluid pass-through.
RE/RB Dimensional Interchangeability
RE bearings share identical bore × OD × width dimensions with RB counterparts. Designers can evaluate both ring configurations in the same housing — enabling rapid prototyping and design optimization without mechanical changes to adjacent components.
Four Grease Lubrication Holes
Standard RE bearings feature four grease ports in the outer ring, providing convenient access for relubrication without disassembly. Compatible with grease, oil-mist, and oil-air lubrication systems for flexible integration into existing machine lubrication circuits.
Two-Piece Inner Ring Design
The split inner ring facilitates bearing assembly and disassembly — particularly advantageous for large-bore bearings (200mm+) where handling a single-piece inner ring would be impractical due to weight and size.
Full Complement — Maximum Load
Like the RB series, RE bearings use a full complement roller design without a cage or separator. This maximizes the number of load-carrying rollers and delivers the highest possible load ratings for applications with significant overturning moments and combined loads.
THK RE / IKO Interchangeable
Direct dimensional drop-in replacement for THK RE series and IKO equivalent crossed roller bearings. Same mounting envelope, same performance specifications — competitive pricing with support from our Luoyang application engineering team.
Industries & Applications for RE Series Crossed Roller Bearings
RE Series crossed roller bearings are trusted across a wide range of precision industries worldwide.
Hollow-Shaft Rotary Tables
RE bearings with their integral outer ring are the preferred choice for hollow-shaft rotary table designs where cables, coolant lines, or laser paths must pass through the bearing center — common in 5-axis machining and laser processing equipment.
Robot Wrist & End-Effector Axes
Outer ring rotation is typical in robot wrist joints and end-effector rotary axes. RE bearings ensure the rotating tool flange maintains precise positioning accuracy under combined payload, process force, and moment loads.
Solar Tracking & Positioners
Large RE bearings (bore 300mm+) support azimuth and elevation rotation in solar tracking systems, heliostats, and precision optical mounts. Integral outer ring provides the stable reference needed for accurate sun-tracking over decades of outdoor exposure.
Inspection & Measurement Systems
Coordinate measuring machines (CMMs), optical comparators, and CT scanning systems rely on RE bearings for smooth, accurate rotation of measurement axes. P2 grade bearings with minimal runout enable sub-micron measurement accuracy.
Need RE Series Crossed Roller Bearings?
Tell us your bore size, precision grade, seal preference, preload class, and quantity. Our engineers will respond within 24 hours with a competitive quotation and technical documentation.