Choose 6800 when minimum OD and width are the first priority
Use 6800 when the assembly is tightly constrained by housing diameter, surrounding parts or mass target.
6800 / 6900 SERIES · COMPACT METRIC BEARINGS
Thin Section Ball Bearings
The 6800 and 6900 series are compact metric thin-section deep-groove ball bearings. Compared with standard 60, 62 and 63 series at a similar bore, they use a smaller outside diameter and radial envelope.
They are selected when compact mechanisms or small housings need less radial space and lower bearing or assembly weight.
The thinner ring section is an envelope choice, not an automatic performance gain; the exact model must balance load capacity, assembled stiffness and sensitivity to fit or distortion.
Thin radial section reference- Typical series
- 6800 / 6900
- Compact OD
- 19–72 mm shown
- Closures
- Open / ZZ / 2RS
Size checking
Thin Section Bearing Size Chart
Compare 22 6800 and 6900 series basic models by bore, outside diameter, width and published closure availability.
22 models
Load and speed require model-specific confirmation| Model | Series | dmm | Dmm | Bmm | Closure | RFQ |
|---|---|---|---|---|---|---|
| 6800 | 6800 Series | 10 | 19 | 5 | Open / ZZ / 2RS | RFQ |
| 6801 | 6800 Series | 12 | 21 | 5 | Open / ZZ / 2RS | RFQ |
| 6802 | 6800 Series | 15 | 24 | 5 | Open / ZZ / 2RS | RFQ |
| 6803 | 6800 Series | 17 | 26 | 5 | Open / ZZ / 2RS | RFQ |
| 6804 | 6800 Series | 20 | 32 | 7 | Open / ZZ / 2RS | RFQ |
| 6805 | 6800 Series | 25 | 37 | 7 | Open / ZZ / 2RS | RFQ |
| 6806 | 6800 Series | 30 | 42 | 7 | Open / ZZ / 2RS | RFQ |
| 6807 | 6800 Series | 35 | 47 | 7 | Open / ZZ / 2RS | RFQ |
| 6808 | 6800 Series | 40 | 52 | 7 | Open / ZZ / 2RS | RFQ |
| 6809 | 6800 Series | 45 | 58 | 7 | Open / ZZ / 2RS | RFQ |
| 6810 | 6800 Series | 50 | 65 | 7 | Open / ZZ / 2RS | RFQ |
| 6900 | 6900 Series | 10 | 22 | 6 | Open / ZZ / 2RS | RFQ |
| 6901 | 6900 Series | 12 | 24 | 6 | Open / ZZ / 2RS | RFQ |
| 6902 | 6900 Series | 15 | 28 | 7 | Open / ZZ / 2RS | RFQ |
| 6903 | 6900 Series | 17 | 30 | 7 | Open / ZZ / 2RS | RFQ |
| 6904 | 6900 Series | 20 | 37 | 9 | Open / ZZ / 2RS | RFQ |
| 6905 | 6900 Series | 25 | 42 | 9 | Open / ZZ / 2RS | RFQ |
| 6906 | 6900 Series | 30 | 47 | 9 | Open / ZZ / 2RS | RFQ |
| 6907 | 6900 Series | 35 | 55 | 10 | Open / ZZ / 2RS | RFQ |
| 6908 | 6900 Series | 40 | 62 | 12 | Open / ZZ / 2RS | RFQ |
| 6909 | 6900 Series | 45 | 68 | 12 | Open / ZZ / 2RS | RFQ |
| 6910 | 6900 Series | 50 | 72 | 12 | Open / ZZ / 2RS | RFQ |
Showing 1–22 of 22 models · 25 per page
Dimensions are common boundary dimensions cross-checked between two manufacturer sources. Load and permissible speed are not shown because ratings differ by manufacturer design, closure, lubricant and other configuration details.
Series selection
6800 vs 6900 Series
At the same bore, the 6800 series uses the smaller OD and width. The 6900 series accepts more radial envelope for a stronger load and stiffness balance.
| Selection point | 6800 Series | 6900 Series |
|---|---|---|
| Example bore d | 10 mm (6800) | 10 mm (6900) |
| Example OD D | 19 mm | 22 mm |
| Example width B | 5 mm | 6 mm |
| Radial envelope | Smaller OD and thinner radial section at the same bore. | Larger OD and width within the thin-section family. |
| Typical load capability | Lower published rating than the corresponding 6900-size example; confirm the exact construction. | More internal section generally allows a higher published rating than the corresponding 6800-size example. |
| Application fit | Use when OD and width are tightly constrained. | Use when some additional envelope is available for load and stiffness margin. |
| Typical products / applications | Compact motors, encoders, sensors, precision instruments and lightweight mechanisms where minimum OD and width are the priority. | Servo and stepper motors, compact gearboxes, automation mechanisms and small machinery where compact size is still required but additional load and stiffness margin is useful. |
Quick selection guidance
Choose 6900 when some additional envelope is available
Use 6900 when compact size is still required, but the application benefits from more section and a stronger load and stiffness balance.
Return to standard 60 / 62 / 63 when duty dominates
Do not force a thin-section solution when the machine can accept a standard deep-groove bearing and needs more margin for load, life or rigidity.
Check the corresponding rowsView 6800 SeriesView 6900 Series
Envelope and duty comparison
Thin Section vs Standard Deep Groove Ball Bearings
A concise family-level comparison; approve the final model from its published rating and application duty.
| Selection point | Thin Section | Standard Deep Groove |
|---|---|---|
| Design priority | Envelope and mass first. | Load, stiffness and service margin first. |
| Ring geometry | Reduced ring and rolling-element section. | More section at the same or nearby bore size. |
| Assembly requirement | More disciplined seat geometry and support. | More tolerant when the surrounding structure has room. |
| Default choice | Use only when the smaller package solves a real constraint. | Prefer when a larger bearing can be accommodated. |
| Typical products / applications | Compact motors, encoders, sensors, precision instruments, lightweight gear mechanisms and compact automation assemblies where outside diameter, width or weight are tightly constrained. | General electric motors, gearboxes, pumps, fans, conveyors, household appliances and industrial machinery where installation space is less restrictive and higher load or stiffness margin is preferred. |
Protection and running resistance
Closure Options
Closure photographs show the corresponding open, shielded and sealed deep-groove construction. Confirm the exact thin-section model and suffix before ordering.
Open
No shield or sealProvides lower running resistance and direct lubricant access for a clean or externally controlled environment.
- Lower closure drag
- Clean or controlled environment
- Direct lubrication access
ZZ / Metal Shield
Non-contact metal shieldsHelps retain grease and exclude larger particles with lower drag than a contacting rubber seal.
- Grease retention
- Particle protection
- Lower drag than contact rubber seals
2RS / Rubber Seal
Contact or low-contact sealsImproves moisture and contamination protection but adds seal drag; permissible speed can be lower for the sealed construction.
- Moisture and debris control
- Improved grease retention
- Higher closure drag
The table records published availability for Open, ZZ and 2RS variants. Confirm the exact suffix, internal clearance, lubricant, width and permissible speed for the selected manufacturer construction.
Model-specific configuration
Available Bearing Configurations
Final bearing selection is not only about d × D × B. Material, clearance, lubrication and noise requirements should also be confirmed for the actual application.
Material
Bearing steel is the common starting option. Stainless steel is available for supported models and corrosion-sensitive applications.
Precision & Clearance
Precision grade is model- and application-specific. Confirm internal clearance such as CN or C3 for the specified fits and operating conditions.
Lubrication
Grease, oil or a special lubricant depends on speed, temperature, service life and environment. Grease fill can be application-specific.
Noise & Vibration
Motor, instrument and precision applications may require noise or vibration screening. Agree the final acceptance requirement for the project.
Assembly examples
Thin Section Bearing Applications
Each example identifies the packaging or mass constraint that drives the bearing-family choice.
Small Electric Motors
Thin-section bearings save radial space in compact motor housings while supporting smooth, high-speed rotation.
Robotics & Actuators
Ideal for compact joints, actuators and motion modules where space, weight and precise movement are important.
Precision Instruments
Supports compact rotating shafts and precision mechanisms where controlled runout and limited installation space matter.
Compact Gearboxes & Reducers
Helps reduce gearbox size while maintaining reliable shaft support in compact transmission systems.
Automation & Compact Machinery
Suitable for compact automation equipment, small machinery and space-limited rotating assemblies.
Drones & Gimbal Systems
Thin profiles help reduce weight and save radial space in drone motors, gimbals and compact camera mechanisms.
Engineering & OEM support
Send Your Thin Section Bearing Requirements
Provide the model or d × D × B envelope and the actual shaft, housing and duty conditions so the family and configuration can be reviewed together.
Send RequirementsModeld × D × BAvailable housing ODApplicationSpeedRadial loadAxial loadTemperatureClosureNoise requirementPrecisionAnnual quantityDrawing / sample
Envelope review
Compare shaft diameter, available housing OD, width and shoulders before selecting the family.
Duty confirmation
Review radial and axial load, speed, life, rigidity, temperature and installation sensitivity.
Configuration confirmation
Confirm closure, fit, clearance, lubricant, precision and noise requirements for the selected model.
Sample and supply review
Align drawing or sample checks, annual quantity, packaging and repeat-production inspection points.
YOUR DIRECT CONTACT
Contact Shelly directly
For general questions, business support, early-stage communication, or a quick follow-up.
ShellySales & OEM Support · LUMI Bearing
Inquiry & quick contact
Emailshelly@lumibearing.comWhatsApp+86 173 1800 3151Phone+86 173 1800 3151
Business supportGlobal OEM support
Technical answers
Thin Section Bearing FAQ
Published availability is shown in the size table. Confirm the final suffix for the selected model before ordering.
Send Your Thin Section Bearing Requirements
Provide the model or installation envelope, load, speed and closure requirement. LUMI can review the 6800 / 6900 family and application-specific configuration before quotation.