This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X30-20, 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).
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20 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 10 to 30 mm. This model is discontinued — the direct replacement is the MBLJ40X30-20.
The AirTAC MALJ40X30-20 is a discontinued 40mm bore, double-acting double-rod mini cylinder with a rear adjustable stroke stopper. By trimming up to 20mm at the rear, it provides a usable end-position window of 10-30mm. The direct replacement is the MBLJ40X30-20, matching the bore, stroke, adjust code, and G1/4 port.
This SKU lacks a -S magnet, so it cannot accept 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. Upgrading to the MBLJ40X30-20 moves you from threaded covers to a riveted rolling-packed body. If you need sensors on the new unit, the switch family changes from the legacy CS1-M/DS1-M to the modern CMSG/DMSG/EMSG series.
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X30-20 |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Adjustable window | 10 – 30 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 MBLJ40X30-20 carries the same ratings.
| 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 MBLJ40X30-20 matches these values.
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×30 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 10–30 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.
The 40mm bore provides 528N pull at 0.5MPa to seat motor stator laminations, while the rear adjuster fine-tunes the pressing depth to compensate for stack height variations.
A capping head uses the 10-30mm stroke window to adjust for different bottle neck heights on a packaging line, relying on the fixed rubber bumper to absorb the 880N @0.7MPa impact.
Replace this MALJ40X30-20 with the direct replacement MBLJ40X30-20. Confirm your 40mm bore, 30mm stroke, 20mm adjust code, PT G1/4 port, and M12x1.25 rod thread. Mounting is FA or LB only; there is no back-cover or SDB option. Because this SKU has no -S magnet, it cannot take a sensor; if your machine needs end-of-stroke detection, specify an MBLJ40X30-20S and use a CMSG/DMSG/EMSG switch. Remember the adjuster is a stop, not a lock, so add an external lock for any held load.
This 30mm stroke is short and highly resistant to rod-bending side loads.
Upgrade checklist
Yes, the MALJ40X30-20 is discontinued. The direct replacement is the MBLJ40X30-20, matching the 40mm bore, 30mm stroke, 20mm adjust code, and G1/4 port. The MBLJ upgrades the construction from threaded covers to a riveted rolling-packed body. Because this specific MALJ SKU lacks a -S magnet, it cannot take a position sensor; if you need detection on the MBLJ, order the -S version which uses CMSG/DMSG/EMSG switches.
The -20 adjust code means you can trim up to 20mm at the rear, creating a usable stroke window of 10-30mm. The adjuster is a travel stop, not a lock, and will not hold a load without live air.
Genuine AirTAC parts produced by AirTAC factory.
The MBLJ40X30-20 replaces this model 1:1.
MBLJ replacements are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
Tell us the quantity and destination — we quote the direct MBLJ40X30-20 replacement with price, stock and lead time, usually within 7-8 hours.