Page 17 Sterngear and shaft seal dimensions Bolt-in Sterntube Glass-in and weld-in Sterntube Tube dimensions Shaft diameter D ins ¾" 1" 1¼" 1½" 1¾" 2 2¼" 2½" Tube diameter ** TD/TD2 1½"/1½" 1½"/1¾" 2"/2" 2¼"/2¼" 2½"/2 5⁄8" 2 7⁄8"/3" 3" 3½" Shaft length L –––––––––––––– TO ORDER –––––––––––––– Tube length, min/max TL cm 3/120 3/150 3/180 3/180 3/210 3/210 3/240 3/240 Unner spigot length B mm 60 60 60 60 70 70 80 80 Overhang length O cm 8 10 13 15 18 20 23 25 Bearing length BL inches 3 4 5 6 7 8 9 10 Prop seat to Tip length P m 79 95 121 140 159 184 203 216 Rope-cutter gap G mm 38 38 41 41 51 51 57 57 Flange size * cm 10x5 13x6 14x8 14x9 16x9 17x9 18x10 23x15 Drilling centres* mm 79 102 111 114 133 140 149 178x57 * Bolt-in style only ** Other diameters available in G.R.P ., aluminium and steel Tubes are shown as ready for flexible seal assemblies, but some can also be fitted with solid glands which are typically 30-40mm shorter than nut type or bolt type glands below. Deep sea seal Stud type gland Nut type gland Canal & river seal Shaft diameter Tube diameter Max Length Set Ins D mm ins TD mm RPM SL mm No 1" – 1¼" 25 – 32 13⁄8” – 15⁄8” 35 – 43 2950 96 2 1" – 1¼" 25 – 32 15⁄8” – 2” 43 – 51 2950 96 3 1¼" – 13⁄8" 32 – 35 1.5⁄8” – 2” 43 – 51 2850 96 4 1¼"– 13⁄8" 32 – 35 2”– 23⁄8” 51 – 60 2850 96 5 13⁄8" – 15⁄8” 35 – 40 2” – 23⁄8” 51 – 60 2750 96 6 13⁄8” – 15⁄8” 35 – 40 23⁄8” – 2¾” 60 – 70 2750 96 7 1¾" 45 2¾” – 31⁄8” 70 – 80 2600 96 8 17⁄8” – 2” 45 - 51 2¾” – 31⁄8” 70 – 80 2600* 96 9 21⁄8” 55 2¾” – 31⁄8” 70 – 80 1550 106 14 2¼” 58 31⁄8” – 3½” 80 – 90 1550 106 11 23⁄8” 60 31⁄8” – 3½” 80 – 90 1500 106 15 2½" 64 31⁄8” – 3½” 80 – 90 1500 106 12 25⁄8” 65 3½”– 4” 90 – 100 1500 106 16 2¾” 70 3½”– 4” 90 – 100 1500 106 13 Shaft Tube Seal Tube Seal Tube Seal Dia Dia** Length Dia** Length Dia Length D ins TD mm SL mm TD mm SL mm TD ins mm SL ins 1” 38 143 38 124 1¾” 45 1¾” 1¼” 51 159 51 140 2” 51 2” 1½” 57 170 57 141 2¼” 57 2¼” 1¾” 63 174 63 155 2¾” 70 2¾” 2” 66 174 63 144 3” 76 3” 2¼” 76 185 76 165 - - - 2½” 84 210 84 190 - - - ** These seals can be supplied to fit a limited range of other sterntube sizes on request. Stud type and Nut type seals can be water or grease fed. Canal seals are grease fed with a screw-down greaser and River seals need to be water fed from the spent cooling water circuit of the engine. On boats fitted with anti-siphon vents, the feed should be connected into the overboard dump hose. All these seals have a short rubber connection (which can be extended if necessary) to allow flexibility, and sealing is with conventional packing in stud and nut types and with two double-lip seals on Canal and River types. Body of Canal and River seals is made of phenolic material that runs well on stainless or bronze shaft with either water or grease for lubrication. Aluminium tubes must be painted where static rubber portion fits. * To use set 9 for 2” shaft, bush must be removed, and so max speed is only 1560RPM. Ideally Deep Sea seals are water fed with spent cooling water from the engine, but if well below waterline on low speed boats, they can just be ventilated. On boats fitted with anti-siphon vents, the feed should be connected into their overboard dump hose. Aluminium tubes must be painted where static rubber portion fits. Deep sea seals Stud type Nut type Canal & river