This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-20, 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 MALJ20X400-20
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 380 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-20.
- BoreØ20 mm
- Stroke400 mm
- Adjust window380–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-20
- 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 MALJ20X400-20
The AirTAC MALJ20X400-20 is a discontinued double-acting, double-rod adjustable-stroke mini cylinder. It features a 20mm bore and a non-standard 400mm stroke (exceeding the 300mm standard, making it a made-to-order item). The rear adjuster allows you to trim up to 20mm, creating a usable end-position window of 380-400mm. The direct replacement is the MBLJ20X400-20, matching the bore, stroke, adjust code, and G1/8 port.
This SKU lacks a magnet (-S), so it cannot accept a position sensor. The rear adjuster acts as a travel stop to fine-tune reach without external hardware, but it will not hold a load without live air. It uses a fixed rubber bumper, not an adjustable cushion. Upgrading to the MBLJ20X400-20 moves you from threaded covers to a riveted rolling-packed body; if you later need a sensor, the MBLJ uses CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M family.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-20 |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 380 – 400 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 MBLJ20X400-20 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 MBLJ20X400-20 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×400 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 380–400 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 MALJ20X400-20 Is Used
PCB Edge-Guiding Gate
Dial the 380-400mm reach on this 157N cylinder to act as a floating edge-guide gate on a conveyor line, absorbing board width variances without adding external stops.
Long-Reach Film Tracker
Trim 20mm at the rear to fine-tune the engagement point of a packaging film tracker arm, preventing web tears during high-speed spool changes.
Carton Flap Folder
Set the exact 400mm end position to fold varying corrugated carton flaps, using the 132N pull force to retract the folder arm cleanly under the machine frame.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20 with MBLJ20X400-20
To replace this MALJ20X400-20, order the MBLJ20X400-20. Confirm the 20mm bore, 400mm stroke, 20mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB is used). Because this SKU has no magnet, it cannot take a sensor; the MBLJ upgrade supports CMSG/DMSG/EMSG switches if needed. The adjuster is a travel stop, not a lock. At 400mm, the 8mm rod is highly susceptible to bending under side loads—ensure strict guiding.
Upgrade checklist
- ✓ Order the MBLJ20X400-20 (same bore/stroke/adjust)
- ✓ Same 380–400 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 MBLJ20X400-20 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20 FAQ
Yes, the MALJ20X400-20 is discontinued. The direct replacement is the MBLJ20X400-20, which matches the 20mm bore, 400mm stroke, 20mm adjust code, G1/8 port, and mounting. The MBLJ upgrades the construction from threaded covers to a riveted rolling-packed body.
The -20 adjust code lets you trim up to 20mm at the rear, giving a usable stroke window of 380-400mm. The adjuster is a travel stop, not a lock; it cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-20 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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