This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X300-30, 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 MALJ20X300-30
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 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 270 to 300 mm. This model is discontinued — the direct replacement is the MBLJ20X300-30.
- BoreØ20 mm
- Stroke300 mm
- Adjust window270–300 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X300-30
- 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 MALJ20X300-30
The AirTAC MALJ20X300-30 is a discontinued double-acting mini cylinder with a 30mm rear adjuster, giving a usable stroke window of 270-300mm. The direct replacement is the MBLJ20X300-30, matching the 20mm bore, 300mm stroke, G1/8 port and force.
This SKU lacks a magnet (-S), so it cannot take a position sensor. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. The fixed rubber bumper softens end impact. The original MALJ uses threaded covers and CS1-M sensors, while the MBLJ upgrade features a riveted rolling-packed body and CMSG switches.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X300-30 |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Adjustable window | 270 – 300 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 MBLJ20X300-30 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 MBLJ20X300-30 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×300 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 270–300 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 MALJ20X300-30 Is Used
Film Wiper Arm
Set the exact end position for a wiper arm on a packaging line, trimming 30mm at the rear to hit the film roller without adding external stop blocks.
Dispenser Head Lowering
Fine-tune the drop height of a micro-fluid dispenser head, adjusting the travel stop to prevent the needle from crashing into the well plate.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 with MBLJ20X300-30
To replace this MALJ20X300-30, use the MBLJ20X300-30. Confirm the 20mm bore, 300mm stroke, 30mm adjust code, G1/8 port, PT thread, and Basic mounting (no back cover or SDB). Because this SKU has no -S magnet, it cannot accept a sensor; upgrading to the MBLJ lets you add a CMSG switch if needed. The adjuster remains a travel stop, not a lock.
At 300mm stroke, the long rod is prone to bending under side loads—ensure guide alignment to prevent rod damage.
Upgrade checklist
- ✓ Order the MBLJ20X300-30 (same bore/stroke/adjust)
- ✓ Same 270–300 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 MBLJ20X300-30 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 FAQ
Yes, the MALJ20X300-30 is discontinued. The MBLJ upgrades the body to a riveted rolling-packed design and uses CMSG sensors.
The 30mm adjuster allows a usable stroke window from 270mm to 300mm. It has a fixed rubber bumper, not an adjustable cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X300-30 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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30 → MBLJ20X300-30)
Tell us the quantity and destination — we quote the direct MBLJ20X300-30 replacement with price, stock and lead time, usually within 7-8 hours.