Porter's Electric Motor Service, Inc.

1310 N. Limestone Street
Gaffney, SC 29340



Technical Library

Porterís technical library is intended as a convenience to our site visitors and is to be used for reference purposes only. This library is constantly updated to keep the most recent material available to you. To request specific information be added to this library, please contact us.


Acids pH Values
Bolt Grade Markings - Metric Bolts
Bolt Grade Markings - US Bolts
Bearing Dimensions - 200 Series
Bearing Dimensions - 300 Series
Capacitors Energy Stored
Center of gravity
Cylindrical Roller Bearing Fit Tolerances
Grease Basics
Housing Fits
NEMA Motor Frame Size Chart
Radial Ball Bearing Fit Tolerances
Shaft Fits
V-Belt Pulley Drives

Measurement Conversions and Application Formulas

Convert Minutes to Decimal Hours
Decimal Multiples of Units
Common Unit of Measure Conversions
Electrical/Mechanical Application Formulas
Fraction/Decimal/Millimeter Equivalents
Gear Reducing Formulas
How to Measure Standard Belts
Hyperbolic Functions
Temperature Conversion Table


Crane Operation Signals


We offer excellent prices
and take great pride in the work that we do. It is this quality of service and after sales care that ensures our clients return to us again and again...



Today, more than ever before, a key to your success is the performance of your most
trusted suppliers. Porterís
Electric Motor Service, Inc.
meets rigid standards...



Porterís Electric Motor Service, Inc. is happy to share technical documentation with its customers. These specifications and documents are avaiable for download...



We are dedicated to meeting the needs of our customers and delivering exceptional customer service. Contact us today for first-rate service, parts and equipment, or power transmission products....