This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is MBLJ40X300-20-S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the MBLJ40X300-20-S in place of this model. The MBLJ replacement upgrades to a riveted rolling-packed body and CMSG / DMSG / EMSG sensors (the MAL used CS1-M / DS1-M).
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S 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 280 to 300 mm. This model is discontinued — the drop-in replacement is the MBLJ40X300-20-S.
- BoreØ40 mm
- Stroke300 mm
- Adjust window280–300 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X300-20-S
About the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S
The AirTAC MALJ40X300-20-S is a discontinued double-acting single-rod mini cylinder with a 40mm bore and 300mm stroke. The -20 code means you can trim up to 20mm at the rear, giving a usable 280-300mm end-position window. It delivers 628N push and 528N pull at 0.5MPa, uses a G1/4 port, and has an M12x1.25 rod-end thread.
The exact drop-in replacement is the MBLJ40X300-20-S, matching bore, stroke, force, and port. The -S magnet on this MALJ works with older CS1-M/DS1-M switches, while the MBLJ upgrades to CMSG/DMSG/EMSG sensors. This MALJ has threaded covers, whereas the MBLJ uses a riveted rolling-packed body. The rear adjuster sets travel but is a stop, not a lock—it will not hold a load without live air.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X300-20-S |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Adjustable window | 280 – 300 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 MBLJ40X300-20-S carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Single-rod force, same as a standard MAL of this bore. The MBLJ40X300-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×300 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 280–300 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 MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S Is Used
PCB Router Z-Axis Depth Stop
Dial the 280-300mm window to set router bit depth on automated PCB depaneling machines, using the 628N push force to drive the spindle reliably without bottoming out.
Carton Flap Folder Timing
Fine-tune the 20mm rear stop on packaging lines to perfectly time the folding stroke as case sizes change, preventing crushing with the fixed rubber bumper absorbing end impact.
Pneumatic Press Tonnage Check
Use the 880N force at 0.7MPa to seat bearings or pins in light assembly presses, adjusting the end position by up to 20mm to accommodate varying part heights without adding external spacers.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S with MBLJ40X300-20-S
To replace the MALJ40X300-20-S, install the drop-in MBLJ40X300-20-S. Confirm the 40mm bore, 300mm stroke, 20mm adjust code, G1/4 port, and PT thread. Mounting is FA or LB only (no back cover or SDB). Swap the CS1-M/DS1-M switches to CMSG/DMSG/EMSG sensors for the MBLJ. Remember the adjuster is a travel stop, not a lock.
For sizing, stepping down to the 32mm bore yields 402N push at 0.5MPa, while stepping up is not possible as 40mm is the largest MALJ bore. At 300mm stroke, prevent rod bending by ensuring strict alignment and avoiding side loads.
Upgrade checklist
- ✓ Order the MBLJ40X300-20-S (same bore/stroke/adjust)
- ✓ Same 280–300 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 MBLJ40X300-20-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-20-S FAQ
Yes, the MALJ40X300-20-S is discontinued. The exact drop-in replacement is the MBLJ40X300-20-S, which matches the 40mm bore, 300mm stroke, 20mm adjust code, G1/4 port, and force. You must upgrade your sensors: the MALJ -S magnet used CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG switches.
At 0.5MPa it provides 628N push and 528N pull. At 0.7MPa push is 880N, and the maximum force is 128kgf at 1.0MPa. The -20 adjust code means the rear screw can trim up to 20mm, creating a usable 280-300mm stroke window. The adjuster is a travel stop, not a lock, and will not hold a load without live air.
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The MBLJ40X300-20-S replaces this model 1:1.
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