Skip to content

Linear actuators

Electric rod and rodless actuators that turn rotary motor motion into controlled linear force and position. Tell us the application and we'll specify the right product, and the parts around it, for your machine.

Linear actuators

Engineering support · Product sourcing · Procurement

Get help selecting and sourcing linear actuators

Send your part number or describe the application. We’ll review the requirement and help with product selection, sourcing, pricing and lead times.

  • Exact parts and engineer-checked alternatives
  • Manufacturer-direct options where available
  • Standard, modified and custom solutions

No obligation to buy. Have a datasheet, drawing or nameplate photo? Reply to your confirmation email to attach it.

Need help choosing? Build a specification →
Add quantity, timing or application notes (optional)
Need help choosing? Open the specification builder

Spec builder

Specify linear actuators

Select every part you need, answer the questions an applications engineer would ask, and see your summary before we ask for any details.

  1. 1Products
  2. 2Performance
  3. 3Environment
  4. 4Volumes
  5. 5Your spec
Step 1 of 5
Specify Motion technical library · Updated · How we prepare our content

In short:An electric linear actuator turns motor rotation into controlled straight-line force and position, usually through a ball, roller or lead screw, or a belt. Choose the type from force, stroke, speed and environment, then size it on the real force profile and the required life, not on peak force alone.

What an electric linear actuator does

An electric linear actuator converts the rotation of a motor into straight-line motion with controlled force, speed and position. In most industrial units a screw does the conversion: the motor turns a ball, roller or lead screw, and a nut drives a thrust rod or a carriage. Belt-driven units swap the screw for a toothed belt to get long strokes at high speed.

They replace pneumatic cylinders where you need more than two end positions, and hydraulic cylinders where you want to get rid of pumps, valves, hoses and leaks. On an OEM machine the choice usually comes down to four things: the force profile, the stroke and speed, how many hours or kilometres it must last, and the environment it lives in.

Types of linear actuator compared

TypeTypical driveStrengthsWatch out for
Electric rod (screw)Ball or lead screw, inline or parallel motorSealed, cylinder-like, good thrust, easy pneumatic swapNeeds external guidance for side loads
Roller screw rodPlanetary roller screwHighest thrust density, long life under heavy or shock loadHigher purchase cost
Rodless screwBall screw, carriage on integral guideCarries load on the carriage, stiff, preciseScrew whip limits speed on long strokes
Rodless beltSteel-reinforced toothed beltLong strokes, high speedLower stiffness and thrust than screws
Integrated-motorServo motor built around the screwShort, no coupling or belt, fewer partsMotor heat goes into the actuator body
Hygienic stainlessStainless rod or integrated actuatorWashdown, food-grade materials, IP69K optionsCost; check heat dissipation in sealed bodies
Linear stepperHybrid stepper with lead screwCompact, simple open-loop positioning at low forceLimited speed and duty; no position feedback unless added

Rod actuators

Rod actuators look and mount like cylinders, so they are the usual route for replacing pneumatics. Examples include Tolomatic ERD, a stainless-tube unit aimed at cylinder replacement, and the general-purpose Tolomatic RSA-ST. For mobile and outdoor equipment on 12, 24 or 48 VDC, self-contained units such as the Thomson Electrak HD carry their control electronics onboard.

Roller screw and high-force actuators

A planetary roller screw spreads load over many threaded rollers rather than balls, so it carries more force and lasts longer in the same diameter. An Exlar engineering article gives an example where the roller screw’s expected life was about 15 times that of a comparable ball screw (Design World). Series such as Tolomatic RSX and Exlar FTX are built for press-fit, forming and hydraulic replacement duties. See ball screw vs roller screw for the full comparison.

Rodless screw and belt actuators

Rodless units guide and carry the load on their own carriage. Screw versions such as Tolomatic MXE or Thomson WM give stiffness and precision. Belt versions such as Tolomatic B3W or Thomson WH cover long, fast transfer strokes where a long screw would whip.

Integrated-motor and hygienic actuators

Putting the servo motor around the screw removes the coupling, belt and separate motor housing, so the axis gets shorter. Exlar GTX combines a servo motor with an inverted roller screw in 60, 80 and 100 mm frames. For washdown areas, look at hygienic stainless designs such as Tolomatic IMA-S, Tolomatic RSH or Exlar GTF.

Linear steppers

A hybrid stepper with a built-in lead screw is the simplest way to get short, precise strokes in lab, medical and instrument equipment. Captive types such as the DINGS’ captive linear stepper include anti-rotation, so they work like a miniature electric cylinder.

Replacing hydraulic or pneumatic cylinders

Hydraulic force is pressure times area. A 63 mm bore at 100 bar produces about 31 kN (π × 31.5² mm² × 10 N/mm²). That figure is the cylinder’s capacity, not the job’s requirement. Tolomatic notes that hydraulic cylinders are often oversized, sometimes by two to three times, and suggests three ways to find the real force: meter the pressure down until the cylinder only just does the work, fit a load cell, or test with a prototype servo actuator and work back from current (Tolomatic).

The same paper warns that the reduced-pressure method only finds peak force. If you assume that peak acts over the whole stroke, you will oversize the actuator or underestimate its life. Map force against position, and record speed and dwell for each move. Our hydraulic to electric actuator guide goes through it step by step.

For pneumatics the problem is usually the reverse: the cylinder runs at whatever force the regulator gives, so measure what the process needs and add margin for friction and acceleration.

How to size a linear actuator

1. Force

Total thrust = process force + friction + gravity component (m·g·sin θ) + acceleration force (m·a). Work it out for every segment of the move, including dwell under load.

2. Motor torque from thrust

For a screw: T = F × L / (2π × η), where L is the lead in metres and η the screw efficiency. Ball screws are typically better than 90% efficient; lead screws range from about 20% to 80% depending on helix angle and nut material (Thomson).

Worked example: 5,000 N on a 10 mm lead ball screw at 90% efficiency needs 5,000 × 0.010 / (2π × 0.9) ≈ 8.8 Nm at the screw, before bearing and seal losses.

3. Speed

Screw speed (rev/s) = linear speed / lead. At 250 mm/s on a 10 mm lead, the screw turns at 25 rev/s, or 1,500 rpm. Check this against the screw’s critical speed for the unsupported length; longer strokes allow lower maximum speeds. A coarser lead raises speed but needs more torque for the same force.

4. Duty and RMS load

Motor and screw heating follow the RMS (root mean square) force over the cycle, not the peak. A press that peaks at 30 kN for 0.5 s in a 10 s cycle has a much lower RMS force than one that holds 30 kN. Use the RMS figure for motor and thermal checks and the peak for the structural check.

5. Life

Ball screw life follows the bearing-style rule L10 = (C / Fm)³ × 10⁶ revolutions, where C is the dynamic load rating and Fm the cubic-mean axial load. Multiply by the lead to get travel. With C = 20 kN and Fm = 4 kN, L10 = 125 million revolutions; on a 10 mm lead that is about 1,250 km. THK applies a load factor of 1.0 to 3.5 depending on vibration, shock and speed (THK), so a shock-loaded axis can lose most of its calculated life. Life falls with the cube of load, so a modest increase in load has a large effect.

6. Side load and guidance

Rod actuators are designed for axial load. Any side load, moment or misalignment shortens screw and bearing life. Use a guided version such as Tolomatic GSA or external guides, or switch to a rodless unit that carries the load on its carriage.

7. Environment

Specify the IP rating, temperature range, washdown chemicals and any ATEX zone. Hygienic applications need more than a high IP code: they also need crevice-free surfaces and food-grade lubricant.

Common mistakes

  • Sizing from hydraulic system pressure. It usually leads to an actuator two or three times larger than needed.
  • Ignoring back-driving. Ball and roller screws can back-drive. Vertical axes need a brake.
  • Using peak force for life. Use the force profile and the cubic-mean load.
  • Forgetting critical speed. Long strokes at high speed need a coarser lead, a larger screw, or a belt.
  • Side-loading a rod. Any side load should be carried by a guide, not by the rod.
  • Mismatching duty. Low-cost DC actuators often have duty limits of 15–25%; check the datasheet conditions.

What to send an engineer for a quote

  • Force profile: peak, continuous and holding force, and direction (push, pull or both)
  • Stroke, move distances, speeds or move times, dwell times and cycles per hour
  • Orientation and moving mass, plus any side loads or moments
  • Required life in cycles, kilometres or years at a stated duty
  • Accuracy and repeatability needed
  • Supply voltage, motor preference and control interface (fieldbus, I/O, analogue)
  • Environment: IP rating, temperature, washdown, hazardous area
  • Envelope limits, mounting style, and any existing cylinder you are replacing (bore, pressure, mounts)

For a structured walk-through, see how to size a linear actuator, or add the details to the spec builder below and our specialist engineering and supply partners will propose a suitable unit.

Guides

Where linear actuators are used

What we need to know to specify linear actuators

These are the questions an applications engineer works through first. Approximate answers are fine: ranges narrow the options quickly, and we confirm the details with you.

  • Force: Under 500 N, 0.5–5 kN, 5–25 kN, 25–100 kN, Over 100 kN
  • Stroke: Under 100 mm, 100–300 mm, 300–1,000 mm, Over 1,000 mm
  • Speed: Under 50 mm/s, 50–250 mm/s, 250–1,000 mm/s, Over 1 m/s
  • Duty: Occasional, Up to 50%, Continuous
  • Replacing: New design, Hydraulic cylinder, Pneumatic cylinder

We also ask about the environment (washdown, outdoor, subsea, ATEX, vacuum, shock and EMC), annual quantities and timescale, because these decide whether a standard, modified or custom design is the best fit.

154 series compared

Series from 32 manufacturers, grouped by type. Figures are the highest published for each series. Open a series for the full specification and, for brands outside our supply network, the alternatives that meet or exceed it.

Rod actuator (25)

BrandSeriesForceStrokeSpeed
TolomaticERD (incl. ERD-SS1 / ERD-SS2 stainless options)2,224 N610 mm1,016 mm/s
TolomaticRSA-ST (standard thrust)17,917 N1,524 mm3,124 mm/s
TolomaticGSA Guided Screw Actuator4,226 N914 mm3,124 mm/s
Motion Control ProductsSRB Linear Servo Actuator49,033 N1,000 mm1,250 mm/s
ThomsonElectrak HD16,000 N1,000 mm71 mm/s
ThomsonElectrak XD25,000 N1,200 mm75 mm/s
ThomsonElectrak 10legacy6,800 N610 mm61 mm/s
ThomsonWarner Linear B-Track K212,460 N610 mm73 mm/s
ThomsonPC Series precision linear actuators6,000 N1,200 mm1,660 mm/s
KollmorgenEC Series electric cylinders (EC1-EC5)discontinued25,000 N1,500 mm1,330 mm/s
KollmorgenN2 Series electric cylindersdiscontinued———
Oriental MotorEAC Series electric linear cylinders (AZ)500 N300 mm—
LINAKLA366,800 N1,200 mm160 mm/s
LINAKLA3715,000 N600 mm10 mm/s
LINAKLA335,000 N600 mm70 mm/s
LINAKLA252,500 N600 mm25 mm/s
LINAKLA766,800 N1,200 mm142 mm/s
EwellixEMA-8031,000 N1,500 mm160 mm/s
EwellixCAHB10,000 N700 mm60 mm/s
EwellixCAR / CAT4,000 N700 mm193 mm/s
EwellixCAHM50,000 N700 mm74 mm/s
FestoESBF17,000 N1,500 mm1,350 mm/s
SMCLEY12,000 N1,000 mm1,200 mm/s
THKEC (Economy cylinder)266 N300 mm450 mm/s
Parker HannifinETH114,000 N2,000 mm1,333 mm/s

Rodless screw actuator (22)

BrandSeriesForceStrokeSpeed
TolomaticB3S Screw-Drive Rodless12,010 N4,547 mm1,524 mm/s
TolomaticBCS Rodless Screw (BCS/MCS)11,700 N3,048 mm—
TolomaticMXE Screw-Drive Rodless (MXE-S / MXE-P)19,127 N3,411 mm—
Motion Control ProductsLE Ballscrew Linear Actuator (semi-sealed)2,050 N1,450 mm1,600 mm/s
Motion Control ProductsLEC Ballscrew Linear Actuator (fully sealed)945 N1,250 mm1,250 mm/s
Motion Control ProductsBLM Built-in Linear Module—1,250 mm1,600 mm/s
ThomsonWM (POWERLINE) linear units12,000 N11,000 mm2,500 mm/s
FestoEGC-BS-KF3,000 N3,000 mm2,000 mm/s
SMCLEFS—1,200 mm1,500 mm/s
SMCLEJS—1,500 mm1,800 mm/s
HIWINKK—1,511 mm1,480 mm/s
THKSKR—1,490 mm3,000 mm/s
THKKR—1,490 mm1,480 mm/s
THKGL—2,720 mm—
igusdrylin SAW / SLW—750 mm—
IAIROBO Cylinder RCP6—1,100 mm1,440 mm/s
IAIROBO Cylinder RCS4—1,100 mm2,200 mm/s
NSKMonocarrier MCM/MCH———
NSKToughcarrier TCH———
RollonTH—4,175 mm—
RollonTT—3,000 mm—
SCHUNKBeta universal linear axis6,000 N5,120 mm1,250 mm/s

Rodless belt actuator (14)

BrandSeriesForceStrokeSpeed
TolomaticB3W Belt-Drive Rodless1,446 N14,579 mm5,080 mm/s
TolomaticMXB Belt-Drive Rodless (MXB-U / MXB-S / MXB-P)1,859 N10,516 mm5,080 mm/s
Motion Control ProductsLB Belt-Drive Linear Actuator—3,050 mm2,000 mm/s
Motion Control ProductsLBC Belt-Drive Linear Actuator (cleanroom)—3,050 mm2,000 mm/s
ThomsonWH (SPEEDLINE) linear units5,000 N11,000 mm10,000 mm/s
FestoEGC-TB-KF2,500 N8,500 mm5,000 mm/s
SMCLEJB—3,000 mm3,000 mm/s
Parker HannifinHLR900 N3,500 mm5,000 mm/s
Parker HannifinOSP-E3,120 N5,675 mm5,000 mm/s
igusdrylin ZLW—3,000 mm5,000 mm/s
RollonELM Plus———
RollonROBOT Plus———
RollonUniline——7,000 mm/s
RollonSAB——15,000 mm/s

Compact actuator (12)

BrandSeriesForceStrokeSpeed
Motion Control ProductsG-Series Leadscrew Linear Actuator6,000 N400 mm—
Motion Control ProductsGT44 Linear Actuator6,000 N400 mm6 mm/s
Motion Control ProductsGD Geared Linear Actuator2,000 N300 mm40 mm/s
Motion Control ProductsLA55Z High Speed Compact Linear Actuator250 N1,000 mm150 mm/s
ThomsonElectrak MD2,000 N300 mm52 mm/s
ThomsonElectrak 1 / Electrak 1SP340 N150 mm75 mm/s
ThomsonElectrak 050 (E050)510 N200 mm48 mm/s
ThomsonMax Jac800 N300 mm60 mm/s
ThomsonWhisperTraklegacy4,000 N500 mm11 mm/s
LINAKLA14750 N130 mm45 mm/s
THKES (Economy slider)266 N600 mm600 mm/s
IAIRCD micro cylinder——300 mm/s

Iron-core linear motor (11)

BrandSeriesPeak forceContinuous forceSpeed
Akribis SystemsAJM1,409.1 N446.8 N5 m/s
Akribis SystemsAKM12,884.3 N6,190.1 N5 m/s
Akribis SystemsAQM1,243 N506 N5 m/s
KollmorgenIC / ICD Ironcore DDL13,448 N8,211 N13.5 m/s
YaskawaSGLF / SGLFW2 iron-core linear7,560 N2,520 N—
YaskawaSGLT / SGLTW twin-magnet linear———
HIWINLMFA20,827 N7,917 N7.4 m/s
SchaefflerL1 linear motors (IDAM)5,171 N3,259 N27 m/s
ETELLMS4,170 N1,030 N—
TecnotionTL iron core linear motors3,200 N1,680 N—
TecnotionTB iron core linear motors4,000 N1,900 N—

Linear stage (11)

BrandSeriesForceStrokeSpeed
TolomaticTRS Twin Profile Rail Stage12,590 N2,200 mm1,270 mm/s
TolomaticTKS Dual Profile Rail Bearing14,501 N2,438 mm1,016 mm/s
AerotechPRO190LM direct-drive linear stage—600 mm2,000 mm/s
AerotechANT130XY two-axis nanopositioning stage—160 mm350 mm/s
AerotechPRO165SL ball-screw linear stage—400 mm—
HIWINLMSSA2,048 N2,700 mm5,000 mm/s
SCHUNKLDN linear motor axis500 N2,700 mm4,000 mm/s
PI (Physik Instrumente)H-850 hexapod—100 mm8 mm/s
PI (Physik Instrumente)H-811 miniature hexapod———
PI (Physik Instrumente)V-551 linear-motor stage180 N230 mm500 mm/s
PI (Physik Instrumente)L-417 high-load linear stage—813 mm300 mm/s

Roller screw actuator (10)

BrandSeriesForceStrokeSpeed
TolomaticRSA-HT (high thrust)58,000 N1,524 mm3,124 mm/s
TolomaticRSX Extreme Force445,000 N1,500 mm760 mm/s
TolomaticSWA/B Resistance Spot Welding and GSWA24,500 N457 mm610 mm/s
ExlarFTX Series177,900 N1,200 mm1,500 mm/s
ExlarFTP Series (press actuator)355,800 N900 mm401 mm/s
ExlarKX Series15,600 N1,200 mm833 mm/s
ExlarFT Serieslegacy177,900 N1,219 mm1,506 mm/s
Bosch RexrothEMC-HP electromechanical cylinder250,000 N1,500 mm830 mm/s
EwellixEMA-10080,000 N2,000 mm890 mm/s
EwellixSRSA / SVSA / SLSA———

Integrated-motor actuator (10)

BrandSeriesForceStrokeSpeed
TolomaticIMA Integrated Motor Actuator30,600 N457 mm1,334 mm/s
ExlarGTX Series30,784 N450 mm1,270 mm/s
ExlarGTW Series (weld gun actuator)30,784 N300 mm1,270 mm/s
ExlarGSX Series51,278 N457 mm1,016 mm/s
ExlarTritex II T2X (AC linear actuator)24,020 N457 mm953 mm/s
ExlarTritex TTX Series11,800 N450 mm847 mm/s
ExlarTritex TDX (Tritex II DC linear actuator)legacy5,293 N457 mm847 mm/s
SEW-EURODRIVECMSB / CMS electric cylinders24,000 N1,200 mm500 mm/s
IAIELECYLINDER6,000 N2,800 mm—
SCHUNKELP compact linear axis—40 mm—

Ironless linear motor (8)

BrandSeriesPeak forceContinuous forceSpeed
Akribis SystemsAUM16,200 N1,980 N5 m/s
Akribis SystemsACR———
Akribis SystemsAWM3,845.3 N769.1 N5 m/s
KollmorgenIL Ironless DDL1,600 N262 N—
SchaefflerULIM ironless linear motors (IDAM)1,932 N669 N24.2 m/s
ETELILM+3,150 N464 N—
TecnotionUM ironless linear motors400 N116 N—
TecnotionUXX ironless linear motors4,200 N846 N—

Linear stepper actuator (7)

Tubular linear motor (7)

BrandSeriesPeak forceContinuous forceSpeed
FAULHABERLM linear DC-servomotors—9.2 N3.4 m/s
LinMotP01-23 (incl. P01-23 HP)138 N46 N7.3 m/s
LinMotP02-23 S (P02-23Sx80F-HP)67.1 N24 N7.3 m/s
LinMotP01-37 (incl. P01-37 S and HP)308 N96 N6.7 m/s
LinMotP01-48 (incl. P01-48 HP)1,020 N408 N4.1 m/s
LinMotP10-54871 N270 N7.1 m/s
LinMotP10-702,720 N890 N6.1 m/s

Piezo motor (5)

Hygienic stainless actuator (4)

BrandSeriesForceStrokeSpeed
TolomaticRSH Hygienic Rod Actuator35,330 N1,219 mm500 mm/s
TolomaticIMA-S / IMA-ST Stainless Integrated Actuator11,120 N457 mm497 mm/s
Motion Control ProductsLA Stainless Steel In-line Actuator (Maritime, LA35M X2)2,300 N400 mm30 mm/s
ExlarGTF Series30,784 N450 mm1,270 mm/s

Voice coil motor (3)

BrandSeriesPeak forceContinuous forceSpeed
Akribis SystemsAVM Standard340.3 N95.6 N—
Akribis SystemsAVM High-Force (AVM-HF)4,715.2 N1,111.4 N—
Akribis SystemsAVA79 N26.32 N—

Linear-rotary motor (2)

BrandSeriesPeak forceContinuous forceSpeed
LinMotPR01 linear-rotary motors1,024 N255 N3.9 m/s
LinMotPR02 linear-rotary motors572 N220 N3.9 m/s

Magnet-free linear motor (1)

BrandSeriesPeak forceContinuous forceSpeed
Motion Control ProductsMMF4 / MMD Magnet-free Track Linear Motor Modules1,124 N456 N—

Inline actuator (1)

BrandSeriesForceStrokeSpeed
Motion Control ProductsLA In-line Linear Actuators6,000 N1,000 mm120 mm/s

Linear motors (1)

BrandSeriesPeak forceContinuous forceSpeed
LinMotMagSpring M01—60 N—

Summarised from manufacturers' published data. Always confirm against the current datasheet; an engineer will check the fit before recommending anything.

Brands

Engineer support

Talk to an engineer about linear actuators

Tell us what you need, whether it is this part, an equivalent or a complete axis built around it. An engineer will review your requirements and reply, normally within one working day.

  • Reviewed by an engineer, not an autoresponder
  • Like-for-like and better-fit alternatives
  • Standard, modified and custom options

Prefer to configure it? Use the spec builder.

We use your details to answer this enquiry and share them with the specialist engineering and supply partner best placed to fulfil it. See our privacy notice.