▁through ▁hard ened ▁balls ▁which ▁rest ▁in ▁det ents ▁on ▁the ▁sh aft ▁and ▁are ▁held ▁in ▁place ▁with ▁spr ings . ▁An ▁ ▁over - tor que ▁condition ▁push es ▁the ▁balls ▁out ▁of ▁their ▁det ents , ▁thereby ▁dec ou pling ▁the ▁sh aft . ▁It ▁can ▁have ▁single ▁or ▁multiple ▁det ent ▁positions , ▁or ▁a ▁snap ▁acting ▁spring ▁which ▁requires ▁a ▁manual ▁reset . ▁There ▁may ▁be ▁a ▁compression ▁adjust ment ▁to ▁adjust ▁the ▁tor que ▁limit . ▁ ▁Many ▁cord less ▁dr ills ▁incorpor ate ▁this ▁type ▁of ▁tor que ▁lim iter ▁in ▁a ▁planet ary ▁g ear set . ▁It ▁may ▁be ▁a ▁part ▁of ▁an ▁assembly ▁of ▁multiple ▁g ear sets ▁used ▁to ▁primarily ▁reduce ▁speed ▁and ▁multiply ▁tor que ▁as ▁well ▁as ▁perform ▁ratio ▁changes . ▁The ▁tor que ▁lim iter ▁is ▁typically ▁the ▁last ▁g ear set ▁in ▁the ▁transmission . ▁It ▁uses ▁the ▁planet ▁car rier ▁as ▁the ▁input ▁with ▁the ▁sun ▁g ear ▁as ▁the ▁output , ▁and ▁the ▁ann ulus ▁normally ▁locked . ▁A ▁series ▁of ▁ball ▁det ents ▁act ▁on ▁the ▁ann ulus ▁to ▁lock ▁it , ▁allowing ▁power ▁to ▁be ▁transm itted ▁from ▁the ▁planet ▁car rier ▁to ▁the ▁sun ▁g ear . ▁When ▁the ▁tor que ▁transm itted ▁through ▁the ▁g ear set ▁reaches ▁a ▁determin ate ▁amount , ▁the ▁tor que ▁acting ▁on ▁the ▁ann ulus ▁causes ▁it ▁to ▁un lock ▁from ▁its ▁ball ▁det ents ▁and ▁freely ▁rotate , ▁causing ▁power ▁to ▁be ▁di vert ed