This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X125-50, 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 MALJ40X125-50
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 50 mm, giving a usable end-position window from 75 to 125 mm. This model is discontinued — the direct replacement is the MBLJ40X125-50.
- BoreØ40 mm
- Stroke125 mm
- Adjust window75–125 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X125-50
- 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 MALJ40X125-50
The AirTAC MALJ40X125-50 is a discontinued double-acting double-rod cylinder with a 40 mm bore and 125 mm stroke. It features a fixed rubber bumper and a rear screw stopper that lets you trim the end position by up to 50 mm, giving a usable stroke window of 75-125 mm. This exact SKU has no magnet and cannot take a position sensor.
The direct replacement is the MBLJ40X125-50, sharing the same bore, stroke, adjust code, G1/4 port, and 128 kgf max force. The MALJ uses threaded covers and the adjuster functions purely as a travel stop, not a lock, meaning it will not hold a load without live air. Upgrading to the MBLJ brings a riveted rolling-packed body, though you lose the ability to retrofit older CS1-M sensors.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X125-50 |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Adjustable window | 75 – 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 MBLJ40X125-50 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 MBLJ40X125-50 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 75–125 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 MALJ40X125-50 Is Used
Pallet Wrap Press
Adjusts the end position to consistently compact varying cardboard thicknesses in a case erector, relying on the fixed rubber bumper to absorb the 880 N @0.7 MPa impact.
Bearing Press Fit
Sets a precise bottoming window for pressing bearings into housings on an assembly line, where the 528 N pull force retracts the rod for the next cycle.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50 with MBLJ40X125-50
To replace the MALJ40X125-50, order the direct replacement MBLJ40X125-50. Confirm your 40 mm bore, 125 mm stroke, 50 mm adjust code, G1/4 port, PT thread, and FA/LB mounting (this series uses no back cover or SDB). Because this specific SKU lacks the -S magnet, it cannot accept a position sensor, and the MBLJ upgrade will require the newer CMSG/DMSG/EMSG switch family if you ever add one. The rear adjuster is a travel stop, not a lock; use an external lock for held loads.
The 125 mm stroke is well within the 500 mm maximum for this bore, avoiding rod-bending side-load issues.
Upgrade checklist
- ✓ Order the MBLJ40X125-50 (same bore/stroke/adjust)
- ✓ Same 75–125 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 MBLJ40X125-50 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X125-50 FAQ
Yes, the MALJ40X125-50 is discontinued. The direct replacement is the MBLJ40X125-50, which matches the 40 mm bore, 125 mm stroke, 50 mm adjust code, G1/4 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design.
The 50 mm adjust code allows you to trim the 125 mm stroke, creating a usable window of 75-125 mm. Note that the adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X125-50 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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