This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X250-30, with the same bore, stroke, output force, port and mounting, so it fits the same application. The MBLJ replacement upgrades to a riveted rolling-packed body and CMSG / DMSG / EMSG sensors (the MAL used CS1-M / DS1-M).
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 30 mm, giving a usable end-position window from 220 to 250 mm. This model is discontinued — the direct replacement is the MBLJ20X250-30.
- BoreØ20 mm
- Stroke250 mm
- Adjust window220–250 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X250-30
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30
The AirTAC MALJ20X250-30 is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and 250mm stroke. It features a rear travel stopper that lets you trim up to 30mm, providing a usable end-position window of 220-250mm without external stops. The direct replacement is the MBLJ20X250-30, which matches the bore, stroke, adjuster, and G1/8 port.
This SKU lacks a magnet (-S) and cannot take a position sensor. The adjuster sets the end position but is a travel stop, not a lock; it will not hold a load without live air. Upgrading to the MBLJ20X250-30 changes the sensor family (if a magnet is added) from the older CS1-M/DS1-M to CMSG/DMSG/EMSG, and swaps the MAL's threaded covers for a riveted rolling-packed body. End impact is absorbed by a fixed rubber bumper, as there is no adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X250-30 |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Adjustable window | 220 – 250 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.1 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Fixed rubber bumper |
| Max standard stroke | Up to 300 mm |
The rear adjuster is a travel stop, not a lock — it sets the end position but does not hold the load without live air. No back-cover code and no SDB on adjustable-stroke. The MBLJ20X250-30 carries the same ratings.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 132 N | 132 N |
| 0.7 MPa | 185 N | — |
| Max (@1.0 MPa) | 27 kgf | |
MALJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod MAL push of the same bore. The MBLJ20X250-30 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×250 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 220–250 mm window. |
| S | Optional magnet for a CS1-M / DS1-M sensor (MBLJ uses CMSG/DMSG/EMSG). |
Replacement: MALJ → MBLJ. No back-cover (CA/U/CM) and no SDB. Mounting: FA / LB.
Where the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 Is Used
Textile Loom Tension Arm
Trims the end position to manage fabric take-up on a weaving loom, where the 132N pull force retracts the guide arm and the rear stopper prevents over-travel without adding external stops.
Dispenser Valve Actuator
Fine-tunes the pinch stroke on a pneumatic fluid dispenser, using the 30mm adjustment window to alter shot volume precisely while relying on the fixed bumper to absorb the 0.1-1.0 MPa impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 with MBLJ20X250-30
To replace the MALJ20X250-30, order the MBLJ20X250-30. Confirm the 20mm bore, 250mm stroke, 30mm adjust code, G1/8 PT port, and FA/LB mounting (there is no back cover or SDB option). Because this SKU has no -S magnet, it cannot accept a sensor; if you need position detection on the MBLJ, you must add the -S option and use CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M. Remember the adjuster is a stop, not a lock, for holding loads.
At 250mm stroke, the 8mm rod is highly susceptible to side-load and bending; ensure rigid guidance to prevent premature seal wear and rod deformation.
Upgrade checklist
- ✓ Order the MBLJ20X250-30 (same bore/stroke/adjust)
- ✓ Same 220–250 mm adjustable window
- ✓ Adjuster is a stop, not a lock
- ✓ No back cover / SDB — plan an FA/LB mount
- ✓ Sensor: swap CS1-M/DS1-M → CMSG/DMSG/EMSG
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.1 – 1.0 MPa operating pressure.
- check The rear adjuster sets the end position — it is not a load lock.
- check No back-cover / SDB on adjustable-stroke — use FA / LB.
- check Front/rear covers are threaded — not for field disassembly.
- check For new builds, specify the MBLJ20X250-30 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30 FAQ
Yes, the MALJ20X250-30 is discontinued. The direct replacement is the MBLJ20X250-30, which matches the 20mm bore, 250mm stroke, 30mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design; if you add a magnet, sensors change from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The 30mm rear adjuster creates a usable stroke window of 220-250mm. Note that this adjuster is a travel stop, not a lock; it will not hold a load without live air pressure.
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Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X250-30 replaces this model 1:1.
Fast Dispatch
MBLJ replacements are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Recommended AirTAC MBLJ Replacements
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