Screw Jacks with travelling ball screw (Mod.A)
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Screw Jacks with travelling ball screw (Mod.A) 2.1 MA BS Series Mod.A - STRUCTURAL ELEMENTS

Screw Jacks with travelling ball screw (Mod.A) 2.1 MA BS Series Mod.A - STRUCTURAL ELEMENTS 1 - ball screw in quenched and tempered alloy steel 2 - ball nut in case-hardened and ground steel with frontal recirculation system that ensures higher performances compared to the radial system, because of greater number of balls which transmit the load 3 - worm with ground ZI involute thread profile (UNI 4760) in case-hardened steel 4 - bronze wormwheel with true involute profile ZI (UNI 4760) 5 - taper roller bearings that provide system high stiffness and allow to maximize the ball screw...

Screw Jacks with travelling ball screw (Mod.A) 2.2 MA BS Series Mod.A - TECHNICAL DATA SIZE Load capacity [kN], (push - pull) Ball screw diameter [mm] Worm gear centre distance Accuracy grade (1) Ball screw code “1” Stroke [mm] for 1 input shaft revolution Diameter × Lead Ball [mm] Accuracy grade Ball screw code “2” Stroke [mm] for 1 input shaft revolution casting in aluminium alloy EN 1706 - AC-AlSi10Mg T6 Housing material Mass of screw jack without ball screw Accuracy grade Mass for every 100 mm of ball screw casting in spheroidal graphite iron EN-GJS-500-7 (UNI EN 1563) (1) - on request,...

Screw Jacks with travelling ball screw (Mod.A) 2.2 MA BS Series Mod.A - TECHNICAL DATA MA 100 BS Load capacity [kN], (push - pull) Ball screw diameter [mm] Worm gear centre distance casting in spheroidal graphite iron EN-GJS-500-7 (UNI EN 1563) Diameter × Lead Ball [mm] Ball screw code “1” Stroke [mm] for 1 input shaft revolution Diameter × Lead Ball [mm] Accuracy grade (1) Ball screw code “2” Stroke [mm] for 1 input shaft revolution Housing material Mass of screw jack without ball screw Mass for every 100 mm of ball screw (1) - on request, ball scre

Screw Jacks with travelling ball screw (Mod.A) 2.3 MA 5 BS Mod.A Performances Following tables show the screw jack LINEAR SPEED v [mm/s] and relative TORQUE T1 [Nm] and POWER P1 [kW] on input shaft, with reference to the INPUT SPEED n1 [rpm], the RATIO (RV, RN, RL) and the LOAD [kN] applied on the screw jack. Please, note that LOAD [kN] here means the equivalent load applied on the ball screw (see Chapter 1.11, page 18: “Ball screw life calculation”). Intermediate figures for linear speed v, torque T1 and power P1 corresponding to different input speeds can be calculated by linear...

Screw Jacks with travelling ball screw (Mod.A) 2.3 MA 5 BS Mod.A Screw jack total efficiency The screw jack total efficiency is calculated as follows: where: ηBS : ball screw theoretical efficiency ηR : worm - wormwheel efficiency ηCT : bearings and seals total efficiency NOTE: the efficiency values in the above table do not take into account the factor 0.92 for ηBS The theoretical efficiency of the ball screw depends on the geometry of the ball tracks only. For a conservative calculation, it is recommended to apply a factor of 0.92 on the given efficiency in order to take into...

Screw Jacks with travelling ball screw (Mod.A) 2.4 MA 10 BS Mod.A Performances Following tables show the screw jack LINEAR SPEED v [mm/s] and relative TORQUE T1 [Nm] and POWER P1 [kW] on input shaft, with reference to the INPUT SPEED n1 [rpm], the RATIO (RV, RN, RL) and the LOAD [kN] applied on the screw jack. Please, note that LOAD [kN] here means the equivalent load applied on the ball screw (see Chapter 1.11, page 18: “Ball screw life calculation”). Intermediate figures for linear speed v, torque T1 and power P1 corresponding to different input speeds can be calculated by linear...

Screw Jacks with travelling ball screw (Mod.A) 2.4 MA 10 BS Mod.A Screw jack total efficiency The screw jack total efficiency is calculated as follows: where: ηBS : ball screw theoretical efficiency ηR : worm - wormwheel efficiency ηCT : bearings and seals total efficiency NOTE: the efficiency values in the above table do not take into account the factor 0.92 for ηBS The theoretical efficiency of the ball screw depends on the geometry of the ball tracks only. For a conservative calculation, it is recommended to apply a factor of 0.92 on the given efficiency in order to take into...

Screw Jacks with travelling ball screw (Mod.A) 2.5 MA 25 BS Mod.A Performances Following tables show the screw jack LINEAR SPEED v [mm/s] and relative TORQUE T1 [Nm] and POWER P1 [kW] on input shaft, with reference to the INPUT SPEED n1 [rpm], the RATIO (RV, RN, RL) and the LOAD [kN] applied on the screw jack. Please, note that LOAD [kN] here means the equivalent load applied on the ball screw (see Chapter 1.11, page 18: “Ball screw life calculation”). Intermediate figures for linear speed v, torque T1 and power P1 corresponding to different input speeds can be calculated by linear...

Screw Jacks with travelling ball screw (Mod.A) 2.5 MA 25 BS Mod.A Screw jack total efficiency The screw jack total efficiency is calculated as follows: where: ηBS : ball screw theoretical efficiency ηR : worm - wormwheel efficiency ηCT : bearings and seals total efficiency NOTE: the efficiency values in the above table do not take into account the factor 0.92 for ηBS The theoretical efficiency of the ball screw depends on the geometry of the ball tracks only. For a conservative calculation, it is recommended to apply a factor of 0.92 on the given efficiency in order to take into...

Screw Jacks with travelling ball screw (Mod.A) 2.6 MA 50 BS Mod.A Performances Following tables show the screw jack LINEAR SPEED v [mm/s] and relative TORQUE T1 [Nm] and POWER P1 [kW] on input shaft, with reference to the INPUT SPEED n1 [rpm], the RATIO (RV, RN, RL) and the LOAD [kN] applied on the screw jack. Please, note that LOAD [kN] here means the equivalent load applied on the ball screw (see Chapter 1.11, page 18: “Ball screw life calculation”). Intermediate figures for linear speed v, torque T1 and power P1 corresponding to different input speeds can be calculated by linear...