This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X300-30S, 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-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S 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-S.
- BoreØ20 mm
- Stroke300 mm
- Adjust window270–300 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X300-30-S
- 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-S
The AirTAC MALJ20X300-30-S is a discontinued double-acting double-rod mini cylinder. The direct replacement is the MBLJ20X300-30-S, matching the 20mm bore, 300mm stroke, G1/8 port, and 30mm adjust code. The rear stopper lets you trim the end position, creating a usable 270-300mm stroke window without external stops.
This -S SKU uses older CS1-M/DS1-M switches, while the MBLJ upgrade uses CMSG/DMSG/EMSG sensors and a riveted body instead of threaded covers. The adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. A fixed rubber bumper softens the end impact.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X300-30-S |
| 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-S 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-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S
| 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-S Is Used
PCB Depaneling Router
Dials the cutting head reach from 270 to 300mm to slice varying PCB panel depths without remounting the 157N actuator.
Dispense Valve Profiling
Fine-tunes the 300mm full extension down by 30mm to set exact fluid deposit depths on automated glue lines.
Light Slide Ejector
Ejects small stamped parts from a die, using the rear stop to dial the exact ejection window for delicate 132N pull retraction.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S with MBLJ20X300-30-S
To replace this MALJ20X300-30-S, order the exact direct replacement MBLJ20X300-30-S. Confirm the 20mm bore, 300mm stroke, 30mm adjust code, G1/8 port, and M8x1.25 rod thread. Mounting is FA or LB only (no back cover or SDB). The -S magnet changes sensor families from CS1-M/DS1-M to CMSG/DMSG/EMSG. Because this is a 300mm stroke on a 20mm bore, rod side-load and bending risks are high; guide the load externally.
Upgrade checklist
- ✓ Order the MBLJ20X300-30-S (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-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-30-S FAQ
Yes, the MALJ20X300-30-S is discontinued. The direct replacement is the MBLJ20X300-30-S, which matches the 20mm bore, 300mm stroke, 30mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design and changes the -S magnet switches from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The 30mm adjust code lets you trim the rear end position, creating a usable stroke window of 270-300mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X300-30-S 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-S → MBLJ20X300-30-S)
Tell us the quantity and destination — we quote the direct MBLJ20X300-30-S replacement with price, stock and lead time, usually within 7-8 hours.