This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is MBLJ40X250-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the MBLJ40X250-20 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 MALJ40X250-20
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 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 230 to 250 mm. This model is discontinued — the drop-in replacement is the MBLJ40X250-20.
- BoreØ40 mm
- Stroke250 mm
- Adjust window230–250 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X250-20
About the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20
The AirTAC MALJ40X250-20 is a discontinued double-acting mini cylinder with a 40 mm bore, 250 mm stroke, and a 20 mm rear adjuster providing a usable stroke window of 230-250 mm. It delivers 628 N push and 528 N pull force at 0.5 MPa. The direct drop-in replacement is the MBLJ40X250-20, matching the bore, stroke, adjust code, and G1/4 port.
This SKU has no -S magnet and cannot accept 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. Upgrading to the MBLJ replaces the older threaded covers with a riveted rolling-packed body. If you need a sensor, the MBLJ-S uses CMSG/DMSG/EMSG switches instead of the legacy CS1-M/DS1-M family.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X250-20 |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Adjustable window | 230 – 250 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 MBLJ40X250-20 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 MBLJ40X250-20 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×250 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 230–250 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 MALJ40X250-20 Is Used
Packaging Flap Folder
Dials the exact 230-250 mm reach to fold varying corrugated carton flaps, using the 628 N push force to crease heavy board without crushing the box.
PCB Test Fixture
Trims the end position to probe dense circuit panels, ensuring the rod stops precisely before damaging delicate traces during automated test cycles.
Wood Router Stop
Sets a repeatable 230-250 mm depth gate on a CNC router feed, holding the 528 N pull force to retract the gate safely between cuts.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 with MBLJ40X250-20
To replace this MALJ40X250-20, specify the MBLJ40X250-20 to match the 40 mm bore, 250 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and FA/LB mounting (no back cover or SDB). The adjuster is a travel stop, not a lock, so add an external lock for held loads. At 250 mm stroke, prevent rod bending by minimizing side loads.
For sizing, step down to a 32 mm bore for 402 N push at 0.5 MPa, or step up to a larger ISO 15552 profile if you need more than the 628 N this 40 mm bore provides.
Upgrade checklist
- ✓ Order the MBLJ40X250-20 (same bore/stroke/adjust)
- ✓ Same 230–250 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 MBLJ40X250-20 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 FAQ
Yes, the MALJ40X250-20 is discontinued. The exact drop-in replacement is the MBLJ40X250-20, which matches the 40 mm bore, 250 mm stroke, 20 mm adjust code, and G1/4 port. The MBLJ upgrades the construction to a riveted rolling-packed body.
The 40 mm bore provides 628 N push and 528 N pull at 0.5 MPa, 880 N push at 0.7 MPa, and a maximum of 128 kgf at 1.0 MPa. The -20 adjust code lets you trim the rear position by up to 20 mm, creating a 230-250 mm usable window. The adjuster is a travel stop, not a lock, and this no-magnet SKU cannot take a sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X250-20 replaces this model 1:1.
Fast Dispatch
MBLJ replacements usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Recommended AirTAC MBLJ Replacements
Request a Quote (Airtac MALJ40 Adjustable Mini Cylinder MALJ40X250-20 → MBLJ40X250-20)
Tell us the quantity and destination — we quote the drop-in MBLJ40X250-20 replacement with price, stock and lead time, usually within 7-8 hours.