This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X20-20S, 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 MALJ40X20-20-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S 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 0 to 20 mm. This model is discontinued — the direct replacement is the MBLJ40X20-20-S.
- BoreØ40 mm
- Stroke20 mm
- Adjust window0–20 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X20-20-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 MALJ40X20-20-S
The AirTAC MALJ40X20-20-S is a discontinued double-acting, double-rod mini cylinder with a 40mm bore and 20mm stroke. The direct replacement is the MBLJ40X20-20-S, matching the force, G1/4 port, and FA/LB mounting. This SKU provides a usable adjustable window of 0-20mm via a rear travel stopper.
The rear adjuster sets the end position but does not hold the load without live air; use an external lock for holding. The -S magnet on this MALJ works with CS1-M/DS1-M switches, while the MBLJ replacement upgrades to CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers, whereas the MBLJ features a riveted rolling-packed body. Both use a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X20-20-S |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Adjustable window | 0 – 20 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 MBLJ40X20-20-S 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 MBLJ40X20-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×20 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 0–20 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 MALJ40X20-20-S Is Used
Pneumatic Press Tonnage
Fine-tune the crimp height of a wire terminal press by trimming the end position up to 20mm, ensuring consistent contact pressure with 528N pull force.
Packaging Flap Folder
Adjust the stroke on a carton erector to fold varying corrugated flap thicknesses, relying on the fixed rubber bumper to soften the end impact.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S with MBLJ40X20-20-S
To replace the MALJ40X20-20-S with the MBLJ40X20-20-S, confirm the 40mm bore, 20mm stroke, 20mm adjust code, G1/4 port, and M12x1.25 rod-end thread. Mounting is FA or LB only; there is no back-cover or SDB option. The -S magnet means a sensor family change from CS1-M/DS1-M to CMSG/DMSG/EMSG. The adjuster is a travel stop, not a lock.
For any stroke over 300mm, add a side-load guide to prevent rod bending.
Upgrade checklist
- ✓ Order the MBLJ40X20-20-S (same bore/stroke/adjust)
- ✓ Same 0–20 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 MBLJ40X20-20-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X20-20-S FAQ
Yes, the MALJ40X20-20-S is discontinued. The direct replacement is the MBLJ40X20-20-S, which matches the 40mm bore, 20mm stroke, 20mm adjust code, G1/4 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design and the -S magnet to CMSG/DMSG/EMSG sensors.
The -20 adjust code lets you trim the 20mm stroke at the rear, giving a usable window of 0-20mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X20-20-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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