This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X50-40, 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 MALJ40X50-40
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 40 mm, giving a usable end-position window from 10 to 50 mm. This model is discontinued — the direct replacement is the MBLJ40X50-40.
- BoreØ40 mm
- Stroke50 mm
- Adjust window10–50 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X50-40
- 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 MALJ40X50-40
The AirTAC MALJ40X50-40 is a discontinued double-acting mini cylinder with a 40mm bore and 50mm stroke. It is discontinued; the direct replacement is the MBLJ40X50-40 (same bore, stroke, force, port, and mounting). This adjustable-stroke model lets you trim up to 40mm at the rear, creating a usable end-position window of 10-50mm.
This SKU has no magnet (-S omitted), so it cannot take 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. The fixed rubber bumper softens end impacts, but this is not an adjustable cushion. Unlike the older threaded covers on this MALJ, the MBLJ replacement uses a riveted rolling-packed body.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X50-40 |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Adjustable window | 10 – 50 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 MBLJ40X50-40 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 MBLJ40X50-40 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×50 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 10–50 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 MALJ40X50-40 Is Used
Connector Overmolding
Fine-tune the rear stop to position an overmold gate accurately, leveraging the 40mm bore's 528N pull to seat the mold core securely.
Pneumatic Press Fit
Adjust the end position to drive small bearings to an exact depth, relying on the fixed rubber bumper to absorb the 880N impact at 0.7 MPa.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40 with MBLJ40X50-40
To replace the MALJ40X50-40, install the direct replacement MBLJ40X50-40. Confirm the 40mm bore, 50mm stroke, 40mm adjust code, G1/4 port, PT thread, and FA/LB mounting (there is no back cover or SDB option). Because this SKU lacks the -S magnet, it cannot accept a sensor; if you need position detection, step up to the MBLJ40X50-40S and use CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M. The adjuster is a travel stop, not a lock; use an external lock for held loads.
Since the stroke is under 300mm, rod-bending side loads are minimal, but avoid side loads on long strokes.
Upgrade checklist
- ✓ Order the MBLJ40X50-40 (same bore/stroke/adjust)
- ✓ Same 10–50 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 MBLJ40X50-40 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-40 FAQ
Yes, the MALJ40X50-40 is discontinued. The direct replacement is the MBLJ40X50-40, matching the 40mm bore, 50mm stroke, 40mm adjust code, G1/4 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design.
The 40mm rear adjuster creates a usable stroke window of 10-50mm. Remember, the adjuster is a travel stop, not a lock; it will not hold a load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X50-40 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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