QJ331 jaw crusher Technical specification sheet - HubSpot QJ331 jaw crusher. Technical specification sheet. The QJ331 jaw crusher further develops the very latest technology used within the Q-range of mobile jaw crushers manufactured by . . rates of production and is able to sustain superb reduction ratios. •. Improved jaw plate retention. •. Danfoss hydraulic.reduction ratio range for jaw crusher,reduction ratio range for jaw crusher,© Copyright R P King 2000 TECHNICAL NOTES 5 CRUSHERSJaw crushers are operated to produce a size reduction ratio between 4:1 and 9:1. Gyratory crushers can produce size reduction ratios over a somewhat larger range of 3:1 to 10:1. The primary operating variable available on a crusher is the set and on jaw and gyratory the open- side set (OSS) is specified. This reflects the.