ITEM Software

ITEM ToolKit Module

NSWC Mechanical Reliability Prediction
US Navy Standard NSWC 11 (98/LE1, 06/LE10)

The NSWC module of ITEM ToolKit uses a series of models for various categories of mechanical components to predict failure rates based on temperature, stresses, flow rates and various other parameters. It provides models for various types of mechanical devices including actuators, springs, bearings, seals, electric motors, compressors, pumps, brakes and clutches and many more. NSWC is currently the only one of its kind.

Due to the wide range of failure rates that occur in apparently similar components, the NSWC Mechanical Prediction module does not rely on failure rate data alone. It also accounts for material properties, operating environment, and critical failure modes at the component level.

The NSWC 11 (98/LE1, 06/LE10) Standard is a commonly used model for mechanical components. Standard procedures for predicting the reliability of mechanical components, sub-systems and systems are defined in the Naval Surface Warfare Center Handbook of Reliability Prediction Procedures for Mechanical Equipment.

The NSWC Handbook

The "Handbook of Reliability Prediction Procedures for Mechanical Equipment" contains twenty-three chapters of information with equations, engineering tables and procedures for estimating the reliability of a mechanical design for the intended operating environment. Handbook procedures are used to determine the reliability of fundamental components such as springs, bearings, seals and gaskets. These component applications are then expanded to subassemblies such as valves, actuators and pumps and then to the system level. Equations in the Handbook include parameters for material properties, operating conditions and stress levels at each equipment indenture level providing a full reliability, maintainability and availability analysis at the system, assembly and component indenture levels.

The handbook covers the following types of mechanical components:

  • Seals and Gaskets
  • Springs
  • Solenoids
  • Valve Assemblies
  • Bearings
  • Gears and Splines
  • Actuators
  • Pumps
  • Filters
  • Brakes and Clutches
  • Compressors
  • Electric Motors
  • Accumulators
  • Threaded Fasteners
  • Mechanical Couplings
  • Slider-Crank Mechanisms
  • Sensors and Transducers
  • Shafts
  • Belt Drives
  • Fluid Conductors
  • Miscellaneous Parts

Telcordia | China 299B

Download Demonstration

To download a free demonstration of our NSWC software click here.

Screen shots | click to enlarge

NSWC Software Screen Shot
Dialog view

NSWC Software Screen Shot
Grid view

NSWC Software Screen Shot
Chart view



Powerful and user friendly NSWC 11 mechanical reliability prediction software

Also inlcudes NSWC 98/LE1 and NSWC 06/LE10

Linked Block facility reduces repetitive data entry

Redundancy modeling including hot standby

Multi systems within the same project

Extensive component libraries to reduce entry time

Multi-document interface allows easy transfer of data

Powerful charting facilties

Combine prediction methods for complex analysis

Optimize designs to meet targeted goals

Select components with regard to reliability and cost savings