b'GEARBOXES - WORM GEAR S H S E R I E S W O R M G E A R O P E R AT O RSCOTCH YOKE QUARTER-TURN, HIGH TORQUE FOR LARGE PIPELINE VALVESEE FFW1W2W WSH1 SH2/SH3KT TD DH1 H2D2 bbh2 h1 h1 D2d dD1 n-MD1 n-MD DMODEL SH1 MODEL SH2, SH3DIMENSIONS (MM)Model E F W W1 W2 K H1 H2 D D1 D2 n-M h h1 h2 d b tSH1 340 410 800 150 - 335 130 135 350 200 300 8-M24 4 130 100 28 109SH2 390 650 800 180 82.5 395 150 150 400 280 350 12-M24 4 160 120 32 130SH3 475 735 800 220 122.5 478 180 189 500 360 450 12-M27 4 184 140 35 152PERFORMANCEGear Handle Maximum Torque Weight Model Ratio Turns to Close Dimensions Allowable Remarks (NM) (KG)ForceSH1 200:1 50 800 80 2.82 with second 18633 162SH2 678:1 170 800 54 reduction 32363 240SH3 828:1 207 800 64 47074 303Note: Supplied unbored with 16mm pilot hole to allow any size keyway to be machined, or can be machined to customer specification.Also available in subsea (IP67) and low temperature configurations up to 320,000NM38 DIAMOND GEAR - Gearboxes'