This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X275-20-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 MALJ40X275-20-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-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 255 to 275 mm. This model is discontinued — the direct replacement is the MBLJ40X275-20-S.
- BoreØ40 mm
- Stroke275 mm
- Adjust window255–275 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X275-20-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 MALJ40X275-20-S
The AirTAC MALJ40X275-20-S is a discontinued double-acting double-rod cylinder with a 40mm bore and 275mm stroke. A rear stopper lets you trim up to 20mm, giving a usable end-position window of 255-275mm. The direct replacement is the MBLJ40X275-20-S, matching the G1/4 port, M12x1.25 rod thread, and FA/LB mounting.
Two key upgrade facts apply when moving to the MBLJ. First, the MALJ uses threaded covers, whereas the MBLJ features a riveted rolling-packed body for superior integrity. Second, this -S magnet works with the older CS1-M/DS1-M switches, while the MBLJ uses the modern CMSG/DMSG/EMSG sensor family. The fixed rubber bumper softens end impact, but the adjuster is a travel stop, not a lock—it will not hold a load without live air.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X275-20-S |
| Bore size | Ø40 mm |
| Stroke | 275 mm |
| Adjustable window | 255 – 275 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 MBLJ40X275-20-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 MBLJ40X275-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×275 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 255–275 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 MALJ40X275-20-S Is Used
PCB Router Z-Axis Limit
Sets a precise 260mm upper travel bound for a spindle descent, where the 20mm rear stopper fine-tunes tool depth without relying on software limits.
Carton Flap Plow
Adjusts the retract window to 255mm so a plow blade clears a passing case packer conveyor, then extends to 275mm to fold glue tabs under 880N at 0.7MPa.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-S with MBLJ40X275-20-S
To replace the MALJ40X275-20-S, order the MBLJ40X275-20-S. Confirm the 40mm bore, 275mm stroke, 20mm adjust code, G1/4 port, PT thread, and FA/LB mounting (no back-cover or SDB options exist). Because this is a -S model, note the sensor change from CS1-M/DS1-M to CMSG/DMSG/EMSG on the new unit. The rear adjuster sets end position but does not lock the load.
At 275mm stroke, watch rod-to-side-load bending on the 16mm rod—ensure parallel guidance to prevent premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ40X275-20-S (same bore/stroke/adjust)
- ✓ Same 255–275 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 MBLJ40X275-20-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X275-20-S FAQ
Yes, it is discontinued. The direct replacement is the MBLJ40X275-20-S, matching the 40mm bore, 275mm stroke, 20mm adjust code, G1/4 port, and FA/LB mounting. You must upgrade your sensors: the MALJ -S magnet uses CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG.
At 0.7MPa push is 880N, and the maximum force is 128kgf at 1.0MPa. The 20mm adjust code lets you trim the rear position, creating a usable stroke window of 255-275mm. Remember, the adjuster is a travel stop, not a lock; it cannot hold a load without live air.
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Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X275-20-S replaces this model 1:1.
Fast Dispatch
MBLJ replacements are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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