Interactive Bearing Training Module - Engineering Documentation
A deep groove ball bearing 3D model transformed into a web-based training module with ISO-compliant tolerances, material standards, surface finishes, and exploded views.
Interactive Bearing Training Module Overview
A deep groove ball bearing 3D model transformed into a web-based training module with ISO-compliant tolerances, material standards, surface finishes, and exploded views.
Can be used for bearing mounting & dismounting training, damage analysis, lubrication principles, internal clearance classes (C2–C5), and technical sales presentations.
What You Will Learn
Assembly Training
Visually standardizes inner/outer ring fit tolerances (H7/j6 etc.) and correct mounting sequence.
Service & Damage Analysis
Makes inspection points such as raceway wear, cage deformation, and seal deterioration easier to understand.
Technical Sales Support
Helps convey technical advantages such as bearing life (L10), speed limits, and lubrication principles faster.
Component Engineering Breakdown
Materials, manufacturing methods, surface conditions, tolerances, and functional roles of the major components.
Outer Ring
Load-bearing housing component
100Cr6 (1.3505) / AISI 52100 – Bearing steel, ISO 683-17 | Hardness: 58–64 HRC (through-hardened)
Raceway: ground & honed, Ra ≤ 0.2 µm (ISO 1302) | Outer surface: ground, Ra ≤ 0.8 µm
Outside diameter: P6 (ISO 492) or normal PN | Raceway radial runout: ≤ 0.005 mm | Housing fit: H7 (ISO 286-2) recommended
Functional Description
The outer ring supports the bearing inside the housing. It transfers load to the surrounding structure and provides the outer raceway for the balls. Normally mounted stationary.
Critical Points
- Housing contact surface (H7 fit)
- Outer raceway (Ra ≤ 0.2 µm)
- Radial runout inspection point (≤ 0.005 mm)
Raceway geometry defines the contact angle with the balls. Surface finish Ra ≤ 0.2 µm directly affects noise level and vibration behavior. H7 housing fit is preferred to allow thermal expansion; M7 or N7 may be used for heavy loads.
Inner Ring
Shaft-mounted component
100Cr6 (1.3505) / AISI 52100 – ISO 683-17 | Hardness: 60–64 HRC
Inner raceway: honed, Ra ≤ 0.2 µm | Bore surface: ground, Ra ≤ 0.8 µm
Bore diameter: P6 (ISO 492) or PN | Shaft fit: j6 or k6 (ISO 286-2) | Radial runout: ≤ 0.005 mm
Functional Description
The inner ring is mounted on the shaft and rotates with it. It transfers load to the balls and ensures smooth transmission of rotation.
Critical Points
- Shaft contact surface (j6/k6 fit)
- Bore diameter accuracy (P6 class)
- Load transfer zone (raceway)
Bore tolerance and shaft fit directly affect rotational precision. j6 (loose fit) or k6 (tight fit) is selected based on speed and load conditions. Incorrect fit leads to clearance issues, overheating, or premature wear.
Inner Raceway
Precision contact surface
100Cr6 (1.3505) – Surface hardness ≥ 62 HRC, ISO 683-17
Honed & superfinished, Ra ≤ 0.1–0.2 µm | Roundness: ≤ 0.002 mm
Raceway profile: ISO 492 P6 precision class | Surface roughness: Ra ≤ 0.2 µm (ISO 4287)
Functional Description
This is the precision surface where the balls contact the inner ring. Load transfer and contact stress occur in this zone.
Critical Points
- Elliptical contact surface
- Ra ≤ 0.2 µm roughness (ISO 4287)
- Roundness tolerance (≤ 0.002 mm)
Surface roughness and roundness directly affect bearing life (L10), vibration levels, and quiet running performance. Superfinishing removes micro-asperities and improves oil film formation.
Rolling Elements (Balls)
Rolling components
100Cr6 (1.3505) / AISI 52100 – Hardness: 60–66 HRC, ISO 3290 Grade G10 or G5
Polished & lapped, Ra ≤ 0.05 µm | Sphericity: ≤ 0.25 µm
Diameter tolerance: ±1 µm (G10) / ±0.5 µm (G5) – ISO 3290 | Sphericity: ≤ 0.25 µm | Lot diameter variation: ≤ 1 µm
Functional Description
The balls roll between the inner and outer rings to reduce friction. They are the primary elements defining the bearing's load capacity and rotational behavior.
Critical Points
- Low-friction rolling
- Diameter tolerance (G10/G5 grade)
- Sphericity & surface quality
Ball grade (G10, G5) directly affects noise and vibration levels. Grade G5 balls are preferred for precision applications and quiet operation. Minimal lot diameter variation ensures balanced load distribution.
Cage (Retainer)
Ball spacing and guiding component
Polyamide 66 (PA66-GF25) – glass fiber reinforced, temp. range: –30°C to +120°C | Alternative: brass (CW612N) or pressed steel (DC04)
Low-friction, smooth molded surface
Pocket diameter: +0.1/+0.2 mm (relative to ball) | Pocket concentricity: ≤ 0.1 mm | Ball spacing: ±0.5° (angular)
Functional Description
The cage keeps the rolling elements evenly spaced, preventing ball-to-ball contact and irregular movement. It also aids lubricant distribution.
Critical Points
- Ball spacing (equal load distribution)
- Pocket geometry (thermal expansion allowance)
- Low-friction polymer surface
PA66-GF25 polyamide cage offers quiet operation and low friction but is limited to +120°C. Brass or steel cages are preferred for high-temperature applications. Pocket clearance is optimized for thermal expansion and lubrication.
Seal / Shield
Protection and sealing component
NBR (Nitrile rubber) + steel backing, temp: –30°C to +100°C | Alternative: FKM (Viton) –20°C to +200°C
Flexible sealing lip (NBR) or non-contact labyrinth (metal shield)
Lip contact pressure: 0.1–0.3 N/mm² | Seating tolerance: H8 (ISO 286-2) | Runout: ≤ 0.05 mm
Functional Description
The seal reduces ingress of dirt, dust, moisture, and foreign particles. It also retains the grease inside the bearing, extending its service life.
Critical Points
- Sealing lip (NBR or FKM)
- Grease retention capacity
- Environmental protection (IP equivalent)
Contact seals (2RS/2RSH) provide effective sealing but increase friction; they can cause overheating at high speeds. Non-contact metal shields (ZZ/2Z) offer lower friction but more limited sealing. The lip geometry is designed to prevent grease leakage.
Training Scope
This interactive module is intended for technical training, engineering visualization, component identification, and mechanical-system analysis. Numerical values, material selections, tolerances, and manufacturing details shown for individual components should be treated as representative technical information unless a specific manufacturer, drawing, or applicable standard is explicitly identified.