This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the drop-in replacement MBLJ40X300-50-S, 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 MALJ40X300-50-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-S 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 250 to 300 mm. This model is discontinued — the drop-in replacement is the MBLJ40X300-50-S.
- BoreØ40 mm
- Stroke300 mm
- Adjust window250–300 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X300-50-S
- 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 MALJ40X300-50-S
The AirTAC MALJ40X300-50-S is a discontinued double-acting single-rod cylinder with a 40mm bore and 300mm stroke. It provides a usable extension window of 250-300mm via a 50mm rear adjuster. The drop-in replacement is the MBLJ40X300-50-S, matching the bore, stroke, adjust code, port and force exactly.
This 40mm bore generates 628N push and 528N pull at 0.5MPa. It uses a G1/4 port, a 16mm carbon-steel rod with hard chrome, and a fixed rubber bumper. The -S magnet works with CS1-M/DS1-M switches; the MBLJ upgrade uses CMSG/DMSG/EMSG sensors and a riveted body instead of threaded covers. The adjuster is a travel stop, not a lock.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X300-50-S |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Adjustable window | 250 – 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 MBLJ40X300-50-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 MBLJ40X300-50-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-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. |
| -50 | Adjustable amount: trim the end to a 250–300 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 MALJ40X300-50-S Is Used
PCB Router Depth Stop
Dial the 250-300mm window to set the exact Z-axis plunge depth on a PCB depaneling router, using the 628N push force to maintain a consistent cut without bottoming out the spindle.
Aluminum Extrusion Press
Fine-tune the end position of a 300mm clamping stroke in an aluminum profile assembly press, absorbing impact with the fixed rubber bumper while hitting the exact 250mm retracted stop.
Carton Flap Folder
Adjust the reach on a packaging line carton folder to accommodate varying box heights, relying on the 528N pull force to retract the 16mm rod cleanly through the 50mm adjustment range.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-S with MBLJ40X300-50-S
To replace this MALJ40X300-50-S with the MBLJ40X300-50-S, confirm the 40mm bore, 300mm stroke, 50mm adjust code, G1/4 port, PT thread, and FA/LB mounting (no back cover or SDB). Note the sensor family changes from CS1-M/DS1-M to CMSG/DMSG/EMSG. The rear adjuster sets the end position but will not hold a load without live air; use an external lock for holding.
For sizing, step down to a 32mm bore for 402N push at 0.5MPa, or step up if you exceed the 128kgf maximum. With a 300mm stroke on a single rod, minimize side loads to prevent rod bending and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ40X300-50-S (same bore/stroke/adjust)
- ✓ Same 250–300 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 MBLJ40X300-50-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-50-S FAQ
Yes, the MALJ40X300-50-S is discontinued. The exact drop-in replacement is the MBLJ40X300-50-S, matching the 40mm bore, 300mm stroke, 50mm adjust code, G1/4 port, and mounting. You will need to upgrade the magnet sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The 40mm bore delivers 628N push and 528N pull at 0.5MPa, 880N push at 0.7MPa, and a maximum of 128kgf at 1.0MPa. The -50 adjuster is a travel stop that lets you trim the end position from 300mm down to 250mm. It does not lock the load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X300-50-S 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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