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Help CenterRA7008 Crossed Roller Bearing Thin Section Bearing Robotic Joints Bearing
Product Spotlights
2. Integrated inner ring & split outer ring
3. Multi-direction load capacity, radial load, axial load and overturning moment
4. Standard P5 precision, customized P4 available
5. Compact thin cross-section, Small thickness saves installation space
6. Widely used inMini collaborative robots, robot end wrists, optical inspection turntables, miniature hollow rotary modules, precision medical devices, semiconductor handling equipment, compact pan-tilt units.
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RA series is an ultra-thin crossed roller bearing with integrated inner ring and split outer ring. Cylindrical rollers are alternately arranged at 90°. There are no pre-machined mounting holes on the rings, so external flanges are required for clamping installation.Preload can be adjusted during assembly to eliminate internal clearance and achieve high rigidity and high rotational accuracy.
This model is specially optimized for inner ring rotation. It's ultra-thin cross-section greatly saves axial installation space and serves as an ideal rotary component for miniaturized precision automation equipment.
Structures:
1.Integrated inner ring and split outer ring
The one-piece inner ring ensures stable rigidity. The split outer ring enables adjustable preload to remove clearance and achieve micron-level positioning accuracy.
2. Ultra-thin compact cross-section
Low thickness saves limited installation space and facilitates miniaturized & lightweight machinery design.
3. Multi-direction combined load capacity
The 90° crossed cylindrical rollers can bear radial load, bidirectional axial load and overturning moment simultaneously. One single bearing can replace multiple bearing sets to simplify mechanical design.
4. Roller spacer structure
Spacers separate rollers to prevent skew and direct contact friction, reducing starting torque and ensuring smooth and stable rotation.
5.Available precision grades
Standard P5 ；P4 high precision can be customized
6.Multiple sealing options
Open type, single seal (U) and double seals (UU) are available to suit clean laboratories and slightly dusty working environments.
Applications:
Mini collaborative robots
robot wrist joints
optical inspection turntables
miniature rotary modules
precision medical equipment
semiconductor handling devices
compact surveillance pan-tilt
rotary units for optical instruments.
parameters:
| Bearing Type | Dimension | Shoulder Size | Basic Load Rating(Radial) |
Weight | ||||||
| Inner Diameter | Out Diameter |
Roller Pitch Diameter | Height | Chamfer | Cr | Cor | ||||
| d | D | Dpw | B | rmin | ds | Dh | kN | kN | kg | |
| RA5008 | 50 | 66 | 57 | 8 | 0.5 | 53.5 | 60.5 | 5.1 | 7.19 | 0.08 |
| RA6008 | 60 | 76 | 67 | 8 | 0.5 | 63.5 | 70.5 | 5.68 | 8.68 | 0.09 |
| RA7008 | 70 | 86 | 77 | 8 | 0.5 | 73.5 | 80.5 | 5.98 | 9.8 | 0.1 |
| RA8008 | 80 | 96 | 87 | 8 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
| RA9008 | 90 | 106 | 97 | 8 | 0.5 | 93.5 | 100.5 | 6.76 | 12.4 | 0.12 |
| RA10008 | 100 | 116 | 107 | 8 | 0.5 | 103.5 | 110.5 | 7.15 | 13.9 | 0.14 |
| RA11008 | 110 | 126 | 117 | 8 | 0.5 | 113.5 | 120.5 | 7.45 | 15 | 0.15 |
| RA12008 | 120 | 136 | 127 | 8 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
| RA13008 | 130 | 146 | 137 | 8 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
| RA14008 | 140 | 156 | 147 | 8 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
| RA15008 | 150 | 166 | 157 | 8 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
| RA16013 | 160 | 186 | 172 | 13 | 0.8 | 165 | 179 | 23.3 | 44.9 | 0.59 |
| RA17013 | 170 | 196 | 182 | 13 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
| RA18013 | 180 | 206 | 192 | 13 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
| RA19013 | 190 | 216 | 202 | 13 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
| RA20013 | 200 | 226 | 212 | 13 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |
Other core products :
YRT Rotary Table Bearing ,
YRTS High speed rotary table bearings ,
YRTM with angle measuring system bearings,
ZKLDF series rotary table bearings ,
RB/RE/RA/RU/SX/XU/XSU/XR/JXR series Crossed roller bearing / Robotic bearing
Thin section bearing / Robotic bearing
Turntable bearing /Slewing bearing ,
Angular Contact Ball Bearing ,
Ceramic bearings.
Besides,Many other precision bearings series available ,and customization service available according to drawings or samples.
If you have any needs, pls contact us anytime, thanks!
Luoyang Yadian Mechanical Equipment Co., Ltd. mainly produces a series of precision bearings including turntable bearings, crossed roller bearings, crossed tapered bearings, harmonic reducer bearings, flexible bearings, RV reducer bearings, constant cross-section thin-section bearings, precision machine tool spindle bearings, and precision rotary table bearings. The bearing production covers inner diameters from Φ3mm to outer diameters of Φ2500mm, with precision grades of P5, P4, and P2; higher precision bearings can be provided upon request. The company's leading products are YRT, YRTS, YRTM, ZKLDF, and ZKLDFM series turntable bearings, as well as RB RE, RU, RA, RA-C, RAU, CRB, CRBC, CRBH, CRBS, CRBT, CRBTF, XU, XA, XI XSU, XSA, XSI, and SX series crossed cylindrical roller bearings, and JXR, XR, and Z series crossed tapered roller bearings. Meanwhile, Luoyang Yadianings can also provide CSG and SHF series harmonic reducer bearings, flexible bearings, RV reducer bearings, constant cross-section thin-section bearings, precision machine tool spindle bearings, precision rotary bearings, and non-standard customized bearings. Currently, the YDPB series products have been widely applied in fields such as CNC machine tools, industrial robots, service robots, collaborative, AGVs, SCARA robots, exoskeleton robots, surgical robots, hexapod robots, quadruped robots, humanoid robots, aviation equipment, radar communications, medical equipment, precision measuring instruments printing and dyeing equipment, alignment platforms, optical equipment, industrial rotary tables, hollow rotary platforms, DD motors/direct drive motors, harmonic reducers, and planetary reducers. They are matched with universities and research institutes, used in special robots, mobile radar vehicles, and national key scientific research projects to replace imports, earning high praise from customers.
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