INDUSTRY COMPONENT

Seals / Bearings

Seals and bearings are precision components that reduce friction, support loads, and prevent contamination in pneumatic pistons/diaphragms and electric motors.

Component Specifications

Definition
Seals are mechanical devices that prevent fluid leakage and contamination ingress between mating surfaces in pneumatic and hydraulic systems. Bearings are machine elements that constrain relative motion to only the desired motion while reducing friction between moving parts. In pneumatic pistons/diaphragms, seals maintain pressure integrity, while in electric motors, bearings support rotor shafts and minimize rotational friction.
Working Principle
Seals function by creating a physical barrier through interference fit or compression, utilizing elastomeric or polymeric materials that deform to fill gaps. Bearings operate on rolling or sliding contact principles: rolling-element bearings use balls or rollers to separate moving surfaces with minimal friction, while plain bearings use lubricated surfaces in direct contact. Both components work to manage mechanical loads, thermal expansion, and environmental factors while maintaining system efficiency.
Materials
Seals: Nitrile rubber (NBR), fluorocarbon (FKM/Viton), ethylene propylene diene monomer (EPDM), polyurethane (PU), polytetrafluoroethylene (PTFE). Bearings: Chrome steel (AISI 52100), stainless steel (440C), ceramic (silicon nitride), bronze alloys, polymer composites (PEEK, acetal). Lubricants: Grease (lithium complex), oil (synthetic PAO), dry lubricants (molybdenum disulfide).
Technical Parameters
  • Hardness 70-95 Shore A for seals, 58-65 HRC for bearings
  • Clearance C3 to C5 for bearings, 0.1-0.5 mm interference for seals
  • Speed Rating Up to 20,000 rpm for electric motors, <1 m/s for pneumatic seals
  • Load Capacity Dynamic: 5-50 kN, Static: 10-100 kN
  • Pressure Rating Up to 300 bar for hydraulic, 10 bar for pneumatic
  • Temperature Range -40°C to +200°C
Standards
ISO 3601, ISO 5753, DIN 3760, DIN 625, ANSI/ABMA 9, ANSI/ABMA 11

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Seals / Bearings.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Premature failure due to improper installation
  • Contamination ingress causing abrasive wear
  • Lubrication breakdown leading to overheating
  • Misalignment creating uneven load distribution
  • Material incompatibility with operating fluids
FMEA Triads
Trigger: Inadequate lubrication
Failure: Bearing seizure or seal hardening
Mitigation: Implement automated lubrication systems and regular maintenance schedules
Trigger: Particulate contamination
Failure: Abrasive wear on bearing races and seal surfaces
Mitigation: Install proper filtration systems and protective covers
Trigger: Excessive load or shock
Failure: Bearing brinelling or seal extrusion
Mitigation: Design with appropriate safety factors and load distribution

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 286 for dimensional tolerances, ISO 1101 for geometric tolerances
Test Method
ISO 15242 for bearing vibration testing, ISO 3601-3 for seal pressure testing, ASTM D1414 for rubber compression set

Buyer Feedback

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Frequently Asked Questions

What is the difference between seals and bearings in industrial applications?

Seals primarily prevent fluid leakage and contamination ingress, while bearings support loads and reduce friction between moving parts. Both are critical for system efficiency but serve different mechanical functions.

How often should seals and bearings be replaced in industrial equipment?

Replacement intervals depend on operating conditions: typically 10,000-50,000 hours for bearings under normal load, and 5,000-20,000 hours for seals, with monitoring for vibration, temperature, and leakage.

Can seals and bearings be used interchangeably between pneumatic and electric systems?

No, they are application-specific. Pneumatic seals handle lower pressures but higher cycle rates, while motor bearings require precise tolerances for high-speed rotation. Material and design specifications differ significantly.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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