OID performs selection of standard designs and engineering development of special solutions for industrial equipment.
What we calculate and verify
Design selection
Selecting the type, size series, and design for the actual radial, axial, and moment loads, speed, temperature, and environmental conditions.
Load and service life
Determining the equivalent load, checking static safety, and estimating the rated bearing life for the given operating regime.
Fits and internal clearance
Checking shaft and housing fits, initial and operating clearance, accounting for interference, thermal expansion, and deformation of mating parts.
Lubrication and temperature
Selecting lubricant type and viscosity, assessing conditions for lubricant film formation, delivery method, and temperature regime.
Mounting and commissioning
Recommendations on heating, mounting tools, fixation, clearance measurement, preload, and condition monitoring after installation.
Failure analysis and assembly audit
Analysis of damage based on parts, photos, and operating data. Checking load, fits, lubrication, temperature, and shaft/housing condition.
Calculation chain
- 01Operating conditions
- 02Fr / Fa / Mt
- 03Support reactions
- 04P / P0
- 05Static safety
- 06Minimum load
- 07L10 / L10h
- 08Clearance • fits • lubrication
- 09Design selection
What data is needed for selection
| Input data | What is helpful to provide |
|---|---|
| Bearing / assembly | Designation of the existing bearing or a drawing of the assembly |
| Loads | Radial Fr, axial Fa, moment Mt, peak and shock loads |
| Speed | Nominal, minimum, and maximum rotational speed |
| Operating regime | Continuous or variable duty, cycle duration |
| Temperature | Bearing, shaft, housing, and ambient environment |
| Shaft and housing | Diameters, fits, material, tolerances, geometry |
| Internal clearance | Required class or measured values before/after mounting |
| Lubrication | Oil or grease, viscosity, delivery method, and frequency |
| Service life | Required operating hours, cycles, or revolutions |
| Precision | Requirements for runout, noise, vibration, and rotational accuracy |
| Environment | Water, dust, chemical exposure, vacuum, electrical currents, etc. |
| Constraints | Dimensions, weight, mounting, maintenance |
Not all the data is known yet?
That's normal for a preliminary request.
Send what information you have — the designation of the existing bearing, a drawing, or a photo of the assembly. Any missing input data will be clarified during technical follow-up.
What the customer receives
Recommended design
Type, size series, internal clearance, precision class, cage, and any special requirements.
Calculated parameters
Equivalent load, static safety, calculated service life, and other applicable parameters.
Mating requirements
Recommendations on shaft and housing fits, operating clearance, precision, and mounting geometry.
Operating conditions
Recommendations on lubrication, temperature, mounting, inspection, and maintenance.
Three independent checks
| Check | Key question |
|---|---|
| Service life | How long can the bearing operate under repeated loading? |
| Static safety | Are the maximum and shock loads within allowable limits? |
| Minimum load | Is stable rolling without slippage ensured? |
And below the table:
A high calculated service life does not replace checking static safety and minimum load.
A separate model is applied for special designs
Rolling bearings
Load, service life, static safety, minimum load, fits, and operating clearance.
Slewing bearings
Combined assessment of radial and axial load and tilting moment; the geometry of the supporting structure and fasteners are considered separately.
Plain bearings
Load, pressure, sliding speed, contact-pair material, temperature, and lubrication conditions.
Special and combined designs
The calculation scheme is determined by the geometry of the specific product and the conditions of the assembly.
In case of bearing failure
Engineering failure analysis
For a preliminary failure assessment, it is helpful to provide:
- photos of the raceways, rolling elements, and cage;
- marking and batch number;
- load and speed data;
- temperature and vibration readings before shutdown;
- lubricant data;
- mounting and dismounting method;
- fits and shaft/housing condition;
- internal clearance or preload;
- operating time before symptoms appeared.
Engineering support at different stages
| Stage | OID support |
|---|---|
| Design | Design selection and calculation for the assembly's conditions |
| Replacing an existing bearing | Checking dimensions, designation, and operating parameters |
| Production preparation | Coordinating material, clearance, precision, and special requirements |
| Mounting | Recommendations on installation, lubrication, and inspection |
| Operation | Analysis of temperature, vibration, and changes in operating regime |
| Failure | Failure assessment and analysis of possible damage mechanisms |
Engineering Tools
Six independent checks with explanations of the inputs, reference tables and diagrams.