This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-100, 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 MALJ20X400-100
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 100 mm, giving a usable end-position window from 300 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-100.
- BoreØ20 mm
- Stroke400 mm
- Adjust window300–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-100
- 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 MALJ20X400-100
The AirTAC MALJ20X400-100 is a discontinued double-acting double-rod mini cylinder with a rear adjustable stop. It trims up to 100 mm at the rear, yielding a usable window of 300-400 mm. The direct replacement is the MBLJ20X400-100, matching the bore, stroke, force, and G1/8 port.
This non-standard 400 mm stroke exceeds the 300 mm max standard for bore 20, making it a made-to-order item. Two upgrade facts stand out. First, the adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. Second, the old threaded covers shift to a riveted rolling-packed body on the MBLJ. Because this SKU lacks the -S magnet, it cannot take a position sensor.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-100 |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 300 – 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 MBLJ20X400-100 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 MBLJ20X400-100 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×400 | Nominal stroke length in mm. |
| -100 | Adjustable amount: trim the end to a 300–400 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 MALJ20X400-100 Is Used
Textile Loom Tension Arm
Trims the rear stop to fine-tune fabric take-up depth, allowing exact thread tensioning on long-stroke looms without adding external stops.
Carton Flap Folder
Adjusts the rear travel window to accommodate varying box heights on packaging lines, relying on the fixed rubber bumper to absorb rapid impacts.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 with MBLJ20X400-100
To replace this MALJ20X400-100 with the MBLJ20X400-100, confirm the 20 mm bore, 400 mm stroke, 100 mm adjust code, PT G1/8 port, and FA/LB mounting (there is no back cover or SDB option). Note the fixed rubber bumper softens impact but does not provide adjustable cushioning. At 400 mm, the 8 mm rod is highly susceptible to side-load bending; ensure rigid front mounting to prevent rod distortion.
Upgrade checklist
- ✓ Order the MBLJ20X400-100 (same bore/stroke/adjust)
- ✓ Same 300–400 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 MBLJ20X400-100 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 FAQ
Yes, the MALJ20X400-100 is discontinued. The direct replacement is the MBLJ20X400-100, which matches the 20 mm bore, 400 mm stroke, 100 mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design, but ratings remain identical.
The 100 mm adjust code lets you trim the rear end position, creating a usable 300-400 mm stroke window. The adjuster is a travel stop, not a lock, and will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-100 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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-100 → MBLJ20X400-100)
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