August 7. 2003

Note: The Table for 160 HP has been modified. If you downloaded a copy before August 7, 2003, please download the new document with the modified table.

The American Chain Association (ACA) has developed improved power ratings for ANSI Standard roller chains.

The ratings feature:

• Speed factors that increase the power capacity of standard series chain by 10% to 30% at moderate to high speeds.
• Ratings for Heavy series chains that increase power capacity by 5% to 15% over standard series chains at low to moderate speeds.
• Galling limits that permit larger pitch (1 inch pitch and larger) chains to run at significantly higher speeds than before.
• Lubrication limits that provide much more flexibility to drive designers.