Double Chain Coupler

=Motor Coupling= This table indicates that 100-20 double roller chain coupling can accommodate 77,000+ inch pounds of force, or about 5000 pounds of force at a 15 inch diameter of a bulldozer wheel. This indicates 20,000 pounds of pushing force in 4 wheel drive configuration - as a scaling of the LifeTrac design strategy.
 * http://ustsubaki.com/pdf/brochures/L10794_coupling.pdf
 * See also [wikipedia on roller chain https://secure.wikimedia.org/wikipedia/en/wiki/Roller_chain]