This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X125-20, 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 MALJ40 Adjustable Mini Cylinder MALJ40X125-20
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20 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 105 to 125 mm. This model is discontinued — the direct replacement is the MBLJ40X125-20.
- BoreØ40 mm
- Stroke125 mm
- Adjust window105–125 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X125-20
- 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 MALJ40 Adjustable Mini Cylinder MALJ40X125-20
The AirTAC MALJ40X125-20 is a discontinued double-acting double-rod cylinder with a 40mm bore and 125mm stroke. It is replaced directly by the MBLJ40X125-20. This adjustable-stroke mini cylinder trims up to 20mm at the rear, giving a usable end-position window of 105-125mm.
The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. This SKU lacks a magnet (-S), so it cannot take a position sensor. Upgrading to the MBLJ40X125-20 changes the construction from threaded covers to a riveted rolling-packed body. Both generations use a fixed rubber bumper, meaning the adjustable stroke must not be confused with an adjustable cushion.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X125-20 |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Adjustable window | 105 – 125 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 MBLJ40X125-20 carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 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 MBLJ40X125-20 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 105–125 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 MALJ40X125-20 Is Used
Printed Circuit Board Press
Fine-tunes the 125mm down-stroke on a PCB routing fixture, ensuring the 16mm rod contacts evenly without over-traveling the tool.
Packaging Flap Folder
Adjusts the end position by 20mm to fold varying carton depths, relying on the fixed rubber bumper to soften the impact at cycle end.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20 with MBLJ40X125-20
To replace this MALJ40X125-20 with the MBLJ40X125-20, confirm the 40mm bore, 125mm stroke, 20mm adjust code, PT G1/4 port, and M12x1.25 rod thread. Mounting is Basic, FA, or LB only; there is no back-cover or SDB option. Because this SKU has no -S magnet, it cannot support a sensor; if you need position detection on the new MBLJ, add the -S code to switch from the old CS1-M/DS1-M switches to the current CMSG/DMSG/EMSG family. Remember the rear adjuster is a stop, not a lock.
At 125mm stroke, keep the rod aligned to prevent side-load bending.
Upgrade checklist
- ✓ Order the MBLJ40X125-20 (same bore/stroke/adjust)
- ✓ Same 105–125 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 MBLJ40X125-20 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-20 FAQ
Yes, the MALJ40X125-20 is discontinued. The direct replacement is the MBLJ40X125-20, which matches the 40mm bore, 125mm stroke, 20mm adjust code, and G1/4 port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The 20mm rear adjuster creates a usable stroke window of 105-125mm. Note that this adjuster acts as a travel stop, not a lock, and this specific SKU has no magnet so it cannot accept a position sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X125-20 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
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