This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X80-30S, 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 MALJ20X80-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 30 mm, giving a usable end-position window from 50 to 80 mm. This model is discontinued — the direct replacement is the MBLJ20X80-30-S.
- BoreØ20 mm
- Stroke80 mm
- Adjust window50–80 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X80-30-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 MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S
The AirTAC MALJ20X80-30-S is a discontinued double-acting double-rod mini cylinder with a rear adjustable stroke stopper. The direct replacement is the MBLJ20X80-30-S, matching the 20mm bore, 80mm stroke, G1/8 port, and 30mm adjust code. With a 30mm trim capacity, this SKU provides a usable end-position window of 50-80mm.
The rear adjuster sets travel limits but does not hold load without live air; use an external lock for held loads. This bore uses an 8mm carbon-steel rod with a 20um hard chrome plating and a heterogeneous grease-retaining seal. Upgrading to the MBLJ20X80-30-S changes the sensor family from the older CS1-M/DS1-M switches to CMSG/DMSG/EMSG, and swaps the threaded covers for a riveted rolling-packed body. A fixed rubber bumper softens end impact; there is no adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X80-30-S |
| Bore size | Ø20 mm |
| Stroke | 80 mm |
| Adjustable window | 50 – 80 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 MBLJ20X80-30-S 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 MBLJ20X80-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×80 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 50–80 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 MALJ20X80-30-S Is Used
Connector Pin Insertion
Fine-tune the downward reach on an overmolded connector pin press, trimming up to 30mm at the rear stopper to seat pins precisely without bottoming out the 8mm rod.
Label Applicator Tamp
Adjust the tamp stroke on a bottle labeling head to compensate for varying container heights, relying on the fixed rubber bumper to absorb the repeated end impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S with MBLJ20X80-30-S
To replace the MALJ20X80-30-S, order the direct replacement MBLJ20X80-30-S. Confirm the 20mm bore, 80mm stroke, 30mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB allowed). The -S magnet means you must migrate from CS1-M/DS1-M to CMSG/DMSG/EMSG switches. Remember the adjuster is a travel stop, not a lock.
If 20mm is too large, there is no smaller MALJ bore. For the 80mm stroke, side-load and rod-bending risks are low, but ensure the 8mm rod is guided to prevent binding.
Upgrade checklist
- ✓ Order the MBLJ20X80-30-S (same bore/stroke/adjust)
- ✓ Same 50–80 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 MBLJ20X80-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30-S FAQ
Yes, the MALJ20X80-30-S is discontinued. The direct replacement is the MBLJ20X80-30-S, which matches the 20mm bore, 80mm stroke, 30mm adjust code, G1/8 port, and FA/LB mounting. You will need to upgrade your sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG switches.
The 30mm adjust code creates a usable stroke window of 50-80mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X80-30-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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