LEAFLET SUPERTEX - αⅡ ･ αⅢ "JMP" Screw Shaft JSW MEGA PERFORMANCE - SHAFT "JMP" screw shaft is applied on SUPERTEX- αⅢ series to achieve its high torque performance. It is capable for reliable production as below operation condition. ・ High capacity production to reduce production cost ・ Low temperature extrusion to improve polymer quality ・ Mixing and dispersion of concentrated inorganic filler or GF JMP shaft is also applicable for SUPERTEX- αⅡ series to improve its reliability which enable to be used under extreme conditions. The Japan Steel Works, Ltd. Plastics Machinery Business Division Interchangeability in TEX- αⅡ : conventional vs JMP JMP screw shaft　has different shape and dimension at starting point of the spline (red colored in below). To a p p l y J M P s c r e w s h a f t w i t h e x i s t i n g s c r e w configuration, the most upstream side screw segments L/D have to be extended by 0.2 to 0.3 D and the next screw segment L/D has to be adjusted to meet the original total L/D. Other screw segments can be reused. JMP screw shaft Spacer Most upstream segment Conventional screw shaft ■ High durability The fatigue strength limit is improved, approx. 3.1 times higher than conventional screw shaft, to realize high torque performance of SUPERTEX- αⅢ series. It also improve mechanical reliability of high torque production of SUPERTEX- αⅡ series. ■ Interchangeability of αⅢ & αⅡ screw segments JMP screw shaft of αⅢ has different spline shape from the conventional screw shaft which are used in αⅡ series. Therefore, screw segments for αⅢ　series are not interchangeable with screw segments for αⅡ series. ■ JMP screw shaft application on αⅡ series JMP screw shaft can apply on　αⅡ series. By replacing one set of screw on the most upstream side with screw segments for JMP screw shaft and adjusting L/D, existing screw segments for　αⅡ can be applied to JMP screw shaft. JMP screw shaft enhances fatigue strength limit approx. 2.5 times higher than conventional screw shaf t for αⅡ series. Corrosion resistance material SUS630 is available for JMP screw shaft so it can be used for mixing of corrosive material. Most upstream segment Gate City Osaki West Tower 1-11-1, Osaki, Shinagawa-ku, Tokyo 141-0032, Japan Below figure shows comparison of fatigue strength limit for conventional screw shaft and JMP screw shaft when setting conventional screw shaft as 100 %. The result shows JMP screw shaft has approx. 2.5 to 3.1 times higher strength than conventional screw shaft. JMP screw shaft for α Ⅲ series are not compatible with α Ⅱ series as their spline　shape and material are different to increase the strength. JMP screw shaft is highly recommended for αⅡ series to improve its reliability. Fatigue strength limit 250 Europe (Germany) Convey segment Mechanical characteristic: conventional vs JMP ■ Wide range application JMP screw shaft is standard application on αⅢ series from TEX25 αⅢ up to TEX120 αⅢ . In αⅡ series, it can be used from TEX44 αⅡ to TEX160 αⅡ . Tokyo Head Office Convey segment Japan Steel Works, Ltd.