myonic Designation System for Ball Bearings
myonic uses a standardized designation system to identify all technical characteristics of bearings. The following example illustrates the complete naming structure:
UL 3006 .9f 1000
Example: Special stainless steel, X arrangement duplex, highest precision class
Designation Code Description
| Position | Code Example | Description |
|---|---|---|
| Material Prefix | U | Special stainless steel (440C - 1.4125) |
| Closure Type | L | Open / V=Shield / Z=Metal shield / F=Filmoseal |
| Basic Designation | 3006 | Bearing dimension code (bore 30mm, 06 series) |
| Duplex Arrangement | .9f | .9f=X arrangement / .9d=O arrangement / .9t=Tandem |
| Tolerance Class | 1000 | ISO 2 / ABEC 9P (Highest precision) |
Contact Angle & Lubrication Codes
| Code | Contact Angle | Frictional Torque | Lubrication |
|---|---|---|---|
| Standard | 0° (radial) | Standard | L## (oil) / G## (grease) |
| .A15 | 15° | Higher | Example: L23, G48 |
| .A25 | 25° | High | See lubrication page |
Complete Suffix Code Reference Table
| Category | Code | Description |
|---|---|---|
| Closures | L | Open (no closure) |
| V | Shield (non-contact) | |
| Z | Metal shield | |
| F | Filmoseal | |
| Duplex Arrangement | .9f | X arrangement (face-to-face) |
| .9d | O arrangement (back-to-back) | |
| .9t | Tandem arrangement | |
| Tolerance Class | 1000 | ISO 2 / ABEC 9P (Ultra precision) |
| 10000 / P4P | ISO 4 / ABEC 7P (High precision) | |
| 100000 / P5P | ISO 5 / ABEC 5P (Precision) | |
| P6 | ISO 6 / ABEC 3 (Standard) | |
| No suffix | ISO 0 / ABEC 1 (General purpose) | |
| Group Classification | S4 | Inner and outer diameter 1.25 µm grouping |
| S2 | Inner and outer diameter 2.5 µm grouping | |
| SN4 | Inner diameter only 1.25 µm grouping | |
| SN2 | Inner diameter only 2.5 µm grouping | |
| SB4 | Outer diameter only 1.25 µm grouping | |
| SB2 | Outer diameter only 2.5 µm grouping | |
| SN4-SB2 | Inner diameter 1.25 µm + Outer diameter 2.5 µm | |
| SN2-SB4 | Inner diameter 2.5 µm + Outer diameter 1.25 µm | |
| Contact Angle | Standard | 0° (radial deep groove) |
| .A15 | 15° (angular contact) | |
| .A25 | 25° (high angular contact) |
Designation Examples
Example 1: UL 3006 .9f 1000 G48
- U = Special stainless steel (440C)
- L = Open (no closure)
- 3006 = Basic designation (bore 30mm)
- .9f = X arrangement duplex (face-to-face)
- 1000 = ISO 2 / ABEC 9P precision
- G48 = Turmogrease Li 802 EP plus grease
Example 2: Z 625 P6 L23
- Z = Metal shield closure
- 625 = Basic designation (bore 5mm)
- P6 = ISO 6 / ABEC 3 precision
- L23 = Winsor L 245X oil (standard)
Cleanliness is Crucial for Miniature Ball Bearings
Cleanliness is a critical factor in ensuring proper functioning of miniature ball bearings. Even minute contaminants can severely affect bearing performance and service life. myonic implements strict cleanliness controls throughout the entire production and packaging process.
How myonic Fulfills Strict Cleanliness Requirements
Environment Control
Complete temperature and humidity control as well as air filtration in all production areas
Ultrasonic Cleaning
Ultrasonic cleaning of components between the individual production steps
Special Cleaning Process
Cleaning the components using special processes developed by myonic immediately before assembly
Clean Room Assembly
Assembly of ball bearings in ISO 7 clean rooms under ISO 5 laminar flow boxes
Strict Personnel Rules
Strict adherence to cleanroom processes by all personnel working there
Final Product Cleaning
Cleaning of the fully assembled product using processes specially developed and optimized by myonic for miniature ball bearings
Filtered Lubricants
Use of special filtered lubricants
Hermetically Sealed Packaging
Packaging of the finished ball bearings in clean and hermetically sealed bags or tubes
This enables myonic to supply customers with ball bearings with the highest possible degree of cleanliness. In order to guarantee this condition until the ball bearing is installed, our customers should also exercise this high degree of care.
Customer Installation and Handling Guidelines
To maintain the highest cleanliness of myonic bearings, we recommend observing the following instructions:
Installation Environment Requirements
| Item | Requirement | Importance |
|---|---|---|
| Adjacent Component Tolerances | All adjacent components must be manufactured to the correct tolerances recommended in this catalog | Critical |
| Surface Quality | Components must be free of burrs, loose particles, swarf, rust, dirt, or similar | Critical |
| Cleaning Location | Cleaning should be carried out outside the assembly area, ensuring parts are not soiled during transportation | High |
| Dedicated Installation Area | Ball bearings should be installed in a specially equipped area that is separated from other rooms | High |
| Environment Conditions | Area should meet clean room requirements with dust-free atmosphere and temperature/humidity control | High |
| No Mechanical Processing | Mechanical processing steps should not take place in the same room | High |
Personnel Operating Guidelines
| Guideline | Detailed Requirement |
|---|---|
| Dress Code | Must wear lint-free gloves and work suits such as coats and overcoats, use hoods made of special lint-free material |
| Strictly Prohibited | Smoking, eating, wearing make-up etc. must be strictly prohibited in the cleanroom |
| Package Opening Timing | Bearings should only be removed from protective packaging immediately before installation |
| Quantity Control | If a package contains more than one bearing, do not remove more than the immediately required number |
| Handling Tools | Ball bearings should be handled with tweezers or other special tools |
| No Direct Contact | High-precision miniature ball bearings must never be touched directly with fingers |
| Protective Gear | Recommend wearing lint and abrasion-free finger cots or gloves |
Important Note:
The higher the demands placed on the bearings, the more important it is to strictly adhere to these recommendations. Even finger oils can affect the performance and service life of high-precision bearings.
myonic ISO Certifications
myonic holds the following international certifications, ensuring product quality and environmental management meet the highest standards:
ISO 9001:2015
Quality Management System
Ensures product quality consistency and continuous improvement
ISO 14001:2015
Environmental Management System
Commitment to environmental protection and sustainable development
Certification Body: LRQA (Lloyd's Register Quality Assurance)
Detailed certification documents available from myonic (German, English, Czech versions)
Material for Ball Bearing Races
myonic offers a variety of material options to meet different application environment requirements. The right choice of material is crucial for optimum function in the end application.
Material Comparison Table
| Suffix | Short Name | Availability | DIN | AISI | AMS | SAE | Corrosion Resistant | Smooth Running | Hardness |
|---|---|---|---|---|---|---|---|---|---|
| X | X105CrMo17 | Standard | 1.4125 | 440 C | 5618 | - | Very good | Good | 61 HRC |
| XG | X65Cr13 | On request | 1.4037 | 420D | - | - | Good | Good | 60 HRC |
| XA | X30CrMoN15-1 | On request | 1.4108 | - | 5898 | - | Excellent | Good | > 58 HRC |
| V | 100Cr6 | On request | 1.3505 | - | 6444 | 52100 | No | Very good | 62 HRC |
Material Properties Description
| Material Suffix | Properties | Recommended Applications |
|---|---|---|
| X (Standard) | X105CrMo17 - This is the standard material, which is mainly used in areas where corrosion resistance is important. This steel has a high degree of corrosion resistance and due to the heat treatment, this material has a good hardness of 61 HRC. | General purpose, corrosion resistant environments |
| XG | X65Cr13 - Introduced to round off the range of corrosion-resistant bearing steels. Due to the low carbon content, the hardness is lower compared to AISI 440C steel, but still sufficient for rolling bearings. The 13% chromium content meets corrosion resistance requirements. | Moderate corrosion environments |
| XA | X30CrMoN15-1 - Stainless steel with a large proportion of nitrogen, producing a special microstructure with improved macromechanical properties, particularly hot hardness, elasticity, flexural strength and elongation at break. | High corrosion environments, medical equipment, high-speed applications |
| V | 100Cr6 - Most frequently used material for ball bearings of all sizes. Complies with AISI 52100 standard, ensures a good, uniform microstructure with hardness of 62 HRC after heat treatment. | High precision, dry environments (no corrosion resistance required) |
Material Selection Advice:
Please contact our application engineers, who will make suggestions for the steel grade that is best suited to your application. Our engineers will offer you the right solution for applications with the highest demands on ball bearings. Steel grades from the above list and/or special materials can be used. Other materials are available on request.