This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X140-50, 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 MALJ20 Adjustable Mini Cylinder MALJ20X140-50
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50 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 90 to 140 mm. This model is discontinued — the direct replacement is the MBLJ20X140-50.
- BoreØ20 mm
- Stroke140 mm
- Adjust window90–140 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X140-50
- 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 MALJ20 Adjustable Mini Cylinder MALJ20X140-50
The AirTAC MALJ20X140-50 is a discontinued adjustable-stroke mini cylinder. The direct replacement is the MBLJ20X140-50, matching the 20mm bore, 140mm stroke, G1/8 port and 50mm adjustment range. This double-acting double-rod actuator lets you dial the usable travel window from 90 to 140mm via a rear stopper screw.
The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. This SKU lacks the -S magnet, so it cannot accept a position sensor. The original MALJ uses threaded covers and a fixed rubber bumper, while the MBLJ upgrade features a riveted rolling-packed body.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X140-50 |
| Bore size | Ø20 mm |
| Stroke | 140 mm |
| Adjustable window | 90 – 140 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 MBLJ20X140-50 carries the same ratings.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 132 N | 132 N |
| 0.7 MPa | 185 N | — |
| Max (@1.0 MPa) | 27 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 MBLJ20X140-50 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×140 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 90–140 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 MALJ20 Adjustable Mini Cylinder MALJ20X140-50 Is Used
Small Part Ejector
Trims the return stop on a 140mm cycle to time the drop precisely, ensuring the 8mm rod clears the chute.
Label Applicator
Adjusts the stroke window to 90mm for short runs, saving air and cycle time over the full 140mm travel.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50 with MBLJ20X140-50
To replace this MALJ20X140-50, order the MBLJ20X140-50. Confirm the 20mm bore, 140mm stroke, 50mm adjust code, G1/8 PT port, and FA or LB mounting (there is no back cover or SDB option). Because this SKU has no -S magnet, it cannot hold a sensor; if you need detection, the MBLJ upgrade requires CMSG/DMSG/EMSG switches rather than the legacy CS1-M/DS1-M. Remember the rear adjuster is a stop, not a lock.
As the smallest available MALJ bore, there is no smaller neighbour. At 140mm stroke, keep the rod guided to prevent side-load bending and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X140-50 (same bore/stroke/adjust)
- ✓ Same 90–140 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 MBLJ20X140-50 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X140-50 FAQ
Yes, the MALJ20X140-50 is discontinued. The direct replacement is the MBLJ20X140-50, matching the 20mm bore, 140mm stroke, 50mm adjuster, G1/8 port and mounting. The MBLJ upgrades the body to a riveted rolling-packed design.
The -50 adjust code lets you trim up to 50mm at the rear, creating a usable 90-140mm window. The adjuster is a travel stop, not a lock, and this no-S SKU cannot accept a sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X140-50 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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