Technical Resources for Motors & More
Explore charts, documentation, & expert advice from industry leaders
Our resource hub brings you decades of electric motor experience at your fingertips. From application-specific specs to catalogs from the industry’s top brands, we provide the technical documentation, engineering formulas, and industry expertise you need to make informed decisions with confidence.
Download Technical Docs, Charts, & Specs
Quickly access free downloads for electric motors, VFDs, and gearing. ESR’s document library has the information you rely on from the industry’s top brands, including ABB, WEG, US Motors, and more.
Browse the Full Document Libraryquick reference: motor charts & engineering formulas
From frame sizes to horsepower calculations, get the data you need to spec and size with confidence.
Nema Quick Reference Chart
This NEMA Quick Reference Chart provides engineers, technicians, and buyers with critical dimension data for electric motor frame sizes, keyseat dimensions, and motor type specifications.
IEC Quick Reference Chart
This IEC Quick Reference Chart offers a comprehensive breakdown of key dimensions, frame sizes, mounting styles, and IP protection ratings for IEC motors. It is an essential resource for engineers and technicians.
Greasing Charts
This document provides comprehensive greasing information for motor bearings, including relubrication schedules, compatible grease types, and conversion metrics for grease quantities. Use these charts to ensure optimal motor maintenance and longevity.
Motor Engineering Formulas
Essential motor engineering formulas, including Ohm’s Law, pump and fan efficiency equations, affinity laws, and AC/DC power calculations.
energy efficiency documents & tools
Boosting efficiency isn’t just about compliance—it’s a smart way to reduce costs and improve performance. Whether you're navigating government regulations or looking for tools to optimize your systems, this section offers valuable resources to guide your decisions.
- EPAct of 1992: Marked the first federal push toward efficiency in motors, setting minimum performance standards for general-purpose motors.
- EISA of 2007: Expanded standards, covering a broader range of motors and increasing required efficiency levels.
- DOE Small Motor Rule of 2010: Set efficiency requirements for ¼–3 hp small motors (polyphase and certain single-phase types).
- DOE Integral Horsepower Rule of 2016:The Integral Horsepower Rule expands on earlier legislation by updating the required efficiency standards for nearly all three-phase AC industrial motors ranging from 1 to 500 HP.
- What’s Coming in 2027:The next wave of DOE regulations is expected to raise the bar further.
- WEG Calculator: Estimate energy and cost savings when switching to WEG motors. Launch »
- Toshiba VFD Calculator:Evaluate how variable frequency drives can reduce energy consumption in your application. Try »
- ABB Drive Composer Pro:Advanced commissioning and tuning software for ABB drives—essential for maximizing energy performance. Download »
- ABB Motor Calculator: Calculate lifecycle energy costs for specific motor applications. Explore »
electric motor insights & industry tips
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