Technical design principles

AP, SP and XP as a toolkit for projects.

The product families remain visible, but not as a rigid sales catalogue. They show how S+R typically solves force line, space, protection class and control, then derives the custom actuator from the project.

S+R electric linear actuators AP, SP and XP
AP · SP · XP
500 kNforce by design
3,000 mmstroke possible
1,000 mm/sspeed
IP65+harsh environment

Product ranges

Three design principles, one technical sizing process.

Each family can be adapted with motor, spindle, sensors, protection class, mounting and control to fit the load case. The selection starts the project clarification; it does not end it.

AP series product view
AP

AP series

Axially guided thrust for high loads and clear installation conditions.

Axial motor arrangement for maximum force density

Force
up to 500 kN
Stroke
up to 3,000 mm
Speed
up to 1,000 mm/s
Protection
IP65+
Duty cycle
up to 100 % duty cycle

rough industrial environments, outdoor use, high forces, positioning and synchronous motion tasks

gear, servo or stepper motordirect couplingATEX optionalstainless steel optional
SP series product view
SP

SP series

Compact thrust when machine space is limited.

Parallel or angular drive arrangement for short installed lengths

Force
up to 500 kN
Stroke
up to 3,000 mm
Speed
up to 1,000 mm/s
Protection
IP65+
Duty cycle
up to 100 % duty cycle

machine modules with limited axial space and demanding integration requirements

worm or spur gearboxcompact installation spacevariable mountingsensor options
XP series product view
XP

XP series

Closed design for dynamics, dirt and hard-to-access equipment.

Timing belt or chain drive for demanding conditions

Force
up to 500 kN
Stroke
up to 3,000 mm
Speed
up to 1,000 mm/s
Protection
IP65+
Duty cycle
up to 100 % duty cycle

dirt, outdoor use, high dynamics and hard-to-access installation positions

closed designEX areas possibleoverload clutchencoder/potentiometer

Selection logic

Which product range fits which load case?

A qualified inquiry usually needs a few hard parameters: force, stroke, speed, duty cycle, installation position, environment, voltage, control and an existing drawing.

Load caseSeriesDesign principle
Plenty of axial spaceAPDirect motor arrangement, clear force line and high force density.
Short installed lengthSPParallel or angular drive arrangement when machine space is limited.
Rough, dynamic, hard to accessXPClosed design with belt or chain drive.
Cutaway view of an electric linear actuator