LINAK LA23 Compact Industrial Electric Push Rod

LINAK LA23 Electric Linear Push Rod: High Performance and Comprehensive Reliability in Compact Design

In the fields of industrial automation, medical equipment, furniture adjustment, and agricultural machinery, electric linear push rods are the core executive components for achieving precise linear motion. LINAK, a Danish company, has launched the LA23 series linear push rod with decades of experience in push rods, lifting columns, control boxes, and other fields. This product is an ideal choice for narrow spaces and high load applications due to its compact size, maximum pushing force of 2500 N, flexible travel range, and multiple intelligent feedback options. LA23 not only provides one-time fault safety protection for mechanical end stop, but also has passed rigorous environmental and electromagnetic compatibility testing, meeting various industry standards worldwide. This article will provide a comprehensive and in-depth technical analysis of LA23 from the aspects of technical specifications, safety features, selection and configuration, performance parameters, environmental adaptability, and integration methods.

Product positioning and basic characteristics

LA23 is a DC powered electric linear push rod, with its core advantages of "small size and large thrust". The push rod housing adopts a compact design, which can easily be embedded in equipment with strict installation space limitations. Whether it is necessary to push up, pull back, or keep an object in a certain position, LA23 can provide stable and reliable linear motion.

The main technical highlights include:

High push-pull force: The maximum load can reach 2500 N (push or pull, depending on the screw pitch), which can meet the needs of most industrial and special applications.

Compact structure: The aluminum outer tube is available in black/light gray, and the overall length has been optimized to accommodate narrow spaces.

Multiple screw pitches: available in 3, 5, 6, 9, 12, 20 mm and other pitches, users can choose according to speed and load requirements.

Flexible travel range: The standard travel range is from 20 mm to 500 mm, with an adjustable step size of 1 mm, covering a wide range of application scenarios.

Rich positioning feedback: supports various position feedback methods such as Hall sensors, potentiometers (0-10V, etc.), PWM, and integrated controllers (IC).

High protection level: optional IPX4 or IPX6, dustproof and waterproof capabilities meet various indoor and outdoor environments.

Safety nut option: For push or pull direction, a safety nut can be added to prevent the load from falling in case of accidents.

Safety usage standards and design principles

3.1 Safety symbol description

LINAK defines three types of prompt symbols in the product manual:

Warning: Failure to comply may result in serious personal injury.

Suggestion: Failure to comply may result in damage to the push rod.

Additional information: Tips for proper use.

All personnel involved in installation, wiring, and operation must be familiar with the contents of this manual. Children, individuals with limited physical or mental abilities are not allowed to use push rods without supervision.

3.2 Pre installation inspection and operation precautions

Before installing or disassembling the push rod, it is necessary to ensure that:

The push rod is in a non operational state.

The push rod is unloaded to prevent accidental release.

Before putting into operation, it is necessary to confirm:

The push rod should be installed correctly according to the instructions.

The moving parts are unobstructed throughout the entire range of travel.

The supply voltage is consistent with the nominal value on the push rod label.

The connecting bolts can withstand corresponding wear and securely fix.

During operation, attention should be paid to:

Listen for abnormal sounds, observe if the operation is smooth, and stop immediately if there is any abnormality.

Avoid lateral loads and only apply force along the axial direction.

Do not step or kick the push rod.

Do not use beyond work restrictions.

When the equipment is not in use, the main power should be cut off to prevent accidental start-up, and abnormal wear should be checked regularly.

3.3 Mechanical end stop and one-time fault safety

LA23 is always equipped with a mechanical end stop device to meet the requirements of EN 60601-1 standard for "one-time fault safety". When the electrical limit switch fails, the mechanical end stop will prevent the push rod from coming out of the screw. Mechanical end stop is only used as a backup protection for electrical end stop.

For different travel lengths, the actual position of the mechanical end upon arrival is calculated as follows:

Travel<50 mm: Retracted end approximately BID -2 mm; The protruding end is approximately BID+SL+2 mm.

Travel ≥ 50 mm: retraction end approximately BID -2 mm; The protruding end is approximately BID+SL+4 mm.

Among them, BID is the built-in size (the distance between the centers of the two mounting holes when retracted), and SL is the stroke.

If the user uses a push rod with a stroke less than 50 mm and the electrical end stops and fails, the push rod will travel an additional distance (50 mm - actual stroke) before touching the mechanical end and stopping. For example, if a 20 mm stroke push rod fails, it will travel an additional 30 mm. This margin must be considered when designing applications.

3.4 Torque Limitation for Piston Rod Eye Installation

During initial installation, excessive rotation of the piston rod eye is not allowed. If the installation position is not correct, it is allowed to first rotate the rod eye to the bottom with a maximum torque of 2 Nm, and then rotate it outward for up to half a turn. This restriction ensures the reliability and sealing of threaded connections.

Product selection code and configuration detailed explanation

The model of LA23 is defined by a series of codes, and users can choose one by one according to their needs. The code structure and meaning are as follows:

Example: 23 6 1 0 0 1 0 00 250 A 4

23:LA23 type.

6: Screw pitch (2=20mm, 3=3mm, 5=5mm, 6=6mm, 9=9mm, 0=12mm).

1: Back fixture. For example, 1=stainless steel with groove (6.1mm), aperture Ø 10.2mm. There are also options such as plastic material and different aperture sizes.

1: Rear end fixing component direction (1=90 °).

0: Piston rod eye. 0=with plastic liner Ø 10.2mm; 1=stainless steel Ø 10.2mm; 2=stainless steel Ø 12.3mm.

0: Security option. 0=None; 1=Push direction safety nut (applicable to pitch 3, 5, 6, 9, 12, 20); 2=Pull direction safety nut (only pitch 6,9,12); 3=Mechanical spline without safety nut; 4=Mechanical spline belt safety nut.

1: Color. 1=Black (RAL 9005)+Aluminum outer tube; 2=Light gray (RAL 7035); 3=Black+Black outer tube.

00: Positioning options. 00=No positioning (only standard electrical terminal stop); 01=Potential free end stop signal; 03=Dual Hall PNP positioning; 1X=simulated position feedback (0-10V, etc.); 2X=analog feedback+free end stop; 3X=PWM feedback; 50=IC (Integrated Controller) without positioning; 52=IC single Hall positioning; 6X=IC analog feedback.

250: Travel length (mm), between 20-500, with 1mm steps.

A: Motor type. A=12V； B=24V。

4: Protection level. 4=IPX4； 6=IPX6。

Note: Cables and wire locks need to be ordered separately. If plastic bushings are not installed on the piston rod eyes or rear end fasteners, noise may be generated.

Positioning and Feedback Options

LA23 provides multiple position feedback solutions to meet the needs of different control systems:

Location code description Feedback signal type Cable core count

00 standard electrical terminal stop, no positioning, no 6

01 Potential free end stop signal end stop switch 6

03 Dual Hall PNP positioning Hall pulse (resolution depends on pitch) 10

1X analog position feedback (0-10V, etc.) 0-10V, 2-8V, 0.5-4.5V, etc. 10

2X simulation feedback+free end stop+same as above+end stop signal 10

3X PWM position feedback 10-90% or 0-80% duty cycle 10

50 IC (integrated controller) with no positioning and only end stop 10

52 IC single Hall positioning Hall pulse 10

6X IC analog feedback 0-10V, etc

The voltage range for analog feedback can be selected from 0-10V, 2-8V, 0.5-4.5V, 0-3.3V, 0.3-3V, etc. PWM feedback can be selected with a duty cycle of 10-90% or 0-80%. The IC version has built-in control electronics, which can achieve advanced functions such as soft stop and self-locking.

Technical specifications and performance parameters

6.1 12V version performance

Maximum load (N) Pitch (mm) Hall resolution (mm/count) No load speed (mm/s) Full load speed (mm/s) Standard stroke (mm) No load current (A) Full load current (A) Impulse current (A)

2500 (1000*) 3 0.188 8 3.1 20-500 0.8 3.6 13.4

1800 (1000*) 5 0.313 13 5.4 20-500 0.8 3.9 13.4

1500 (1000*) 6 0.375 15 6.6 20-500 0.8 3.6 13.4

1200 (1000*) 9 0.562 20 9.9 20-500 0.9 4.0 13.4

900 12 0.750 26 13 20-500 0.9 3.8 13.4

300 20 1.250 38 21.5 20-500 0.8 4.3 13.4

*Note: The maximum load when traveling 300-500mm is 1000N.

6.2 24V version performance

Maximum load (N) Pitch (mm) Hall resolution (mm/count) No load speed (mm/s) Full load speed (mm/s) Standard stroke (mm) No load current (A) Full load current (A) Impulse current (A)

2500 (1000*) 3 0.188 8 3.2 20-500 0.3 1.7 8.7

1800 (1000*) 5 0.313 13 5.4 20-500 0.4 1.9 8.7

1500 (1000*) 6 0.375 15 6.4 20-500 0.4 1.7 8.7

1200 (1000*) 9 0.562 20 9.5 20-500 0.4 1.8 8.7

900 12 0.750 26 12.6 20-500 0.4 1.9 8.7

300 20 1.250 38 21.5 20-500 0.4 2.4 8.7

Tolerance for current and speed: ± 20% for 12V version current, ± 10% for speed; The 24V version has a current of ± 10% and a speed of ± 10%. All data were measured in a stable power supply environment at 20 ° C.

6.3 Selection of safety nuts and rear end fasteners

When the load is high or it is necessary to prevent falling, safety nuts and suitable rear end fasteners should be provided:

Pitch (mm) Load (N) Safety Nut Recommended Steel Rear End Fixing Component Plastic Rear End Fixing Component

20 300 does not provide pulling direction, only pushing direction is required

12 900 optional (push or pull) pull direction must only push direction

9 1200 optional (push or pull) pull direction must only push direction

6 1500-1800 optional pull direction must only push direction

5 1800 optional pull direction must only push direction

3 2500 optional pull direction must only push direction

For tensile loads, steel rear end fasteners must be used, as plastic parts have insufficient strength.

6.4 Self locking ability

The self-locking ability of LA23 depends on the screw pitch and whether the motor is short circuited. The following table shows the holding force when the motor is short circuited (such as the IC controller automatically short circuiting the motor when power is off):

Pitch (mm) Maximum holding load without short circuit (N) Maximum holding load with short circuit (N)

20 100 300

12 75 900

9 75 1200

6 120 1500

5 160 1800

3 250 2500

It can be seen that when the motor is short circuited, the self-locking ability is greatly improved. The IC version automatically provides this function when powered on. When using a DC motor for soft stop, reverse high voltage spikes will occur, and the power supply must be able to withstand them without shutting down the output.

Installation size and built-in size calculation

The external dimension drawing of LA23 (see original manual for details) defines BID (Built in Dimension, which is the center distance between the two mounting holes when retracted). BID depends on safety options, stroke length, and screw pitch.

For the absence of a safety nut with a stroke of 20-49 mm and a pitch of 6/9/12/20, the minimum BID is 160mm; When the pitch is 3/5, the minimum BID is 168mm. For safety nuts (push), similar but slightly different. When the stroke is ≥ 50mm, BID is usually "base+stroke". For example, when there is no safety nut, pitch 6/9/12/20, and stroke 50-200mm, BID=110+stroke (mm).

In addition, the extended BID version can be ordered, and its maximum allowable value is limited by the formula: for pitch 6/9/12/20 and without safety nuts, the maximum BID ≤ 730 stroke; For pitch 3/5, maximum BID ≤ 738 stroke, etc. When designing, it is necessary to choose the appropriate built-in size according to actual needs.

The tolerance for all built-in dimensions and travel is ± 2 mm.

Cables and connectors

LA23 offers multiple cable options:

10 Pole Micro Fit Flywire (Black): Used for locating options 03, 1X, 2X, 3X, 50, 52, 6X, etc.

6-pole flying wire (black): used for standard non positioning or potential free end stop options.

The cable length can be selected from 1.5m, 2.5m, 5m, 10m, etc. The wire lock must be ordered separately to ensure stress relief at the joint.

Environmental and Mechanical Reliability Testing

9.1 Climate testing

Low temperature storage: -45 ° C for 16 hours, then -40 ° C for 72 hours, without connecting power, test function after restoring room temperature.

Low temperature operation: -30 ° C for 2 hours, followed by full load and reduced voltage testing.

High temperature storage: 70 ° C for 72 hours.

High temperature operation: 55 ° C for 2 hours, followed by full load and reduced voltage testing.

Rapid temperature change: -30 ° C ↔ + 70 ° C, conversion time<10 seconds, 100 cycles.

Slow temperature change: 5 ° C/min,+70 ° C for 60 minutes, -30 ° C for 30 minutes, 1000 cycles (90 days).

Salt spray: ISO 9227, exposed for 500 hours.

Protection level: IP66 (dustproof IP6X, waterproof IPX6100 liters/minute spray for 3 minutes).

Chemicals: diesel, hydraulic oil, ethylene glycol, saturated urea solution, lime solution, NPK fertilizer soaked for 96 hours, tested for corrosion.

9.2 Mechanical Testing

Free fall: Drop from a height of 0.4 meters onto the felt floor, on all sides.

Vibration: Random, impact, and bump testing.

9.3 Electrical Immunity Test

LA23 has passed multiple EMC immunity tests:

Radiation immunity: 30-200 V/m (ISO 11452-2), 10 V/m (IEC 61000-4-3, 27-6000 MHz).

RF common mode: 10Vrms, 0.15-80 MHz (IEC 61000-4-6).

Power frequency magnetic field: 30 A/m, 50/60 Hz (compliant with ISO 7176-21 wheelchair EMC requirements).

Transient conduction: ISO 7637-2 pulses 1, 2a, 2b, 3a, 3b, 4,5b.

Electrostatic discharge: Contact discharge up to 8kV (ISO 10605) or 6kV (IEC 61000-4-2); Air discharge can reach a maximum of 15kV.

Electrical fast transient: ± 2kV (IEC 61000-4-4).

Surge: ± 0.5kV line to line, ± 1kV line to ground.

9.4 Launch Requirements

Narrowband radiation (1m distance): 30-75 MHz 52-42 dB μ V/m; 75-400 MHz 42-53 dBμV/m； 400-1000 MHz 53 dBμV/m。

Broadband radiation (1m): 62-52 dB μ V/m (30-75MHz), 52-63 dB μ V/m (75-400MHz), 63 dB μ V/m (400-1000MHz).

10m distance radiation: 30-230 MHz 30 dB μ V/m; 230-1000 MHz 37 dBμV/m（CISPR 16-2-3）。

Conducted emission (DC port): 0.15-0.5 MHz 79 dB μ V (QP)/66 dB μ V (AV); 0.5-30 MHz 73 dBμV（QP）/60 dBμV（AV）。

Conducted transient emission: 12V system+75V/-112V; 24V system+150V/-150V (ISO 7637-2).

These tests ensure the compliance of LA23 in electromagnetic environments such as industrial, agricultural, and mobile machinery.