This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X120-30-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 MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-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 90 to 120 mm. This model is discontinued — the direct replacement is the MBLJ20X120-30-S.
- BoreØ20 mm
- Stroke120 mm
- Adjust window90–120 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X120-30-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 MALJ20X120-30-S
The AirTAC MALJ20X120-30-S is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and 120mm stroke. It features a rear adjuster that lets you trim up to 30mm, giving a usable end-position window of 90-120mm. The direct replacement is the MBLJ20X120-30-S, matching the bore, stroke, adjust code, and G1/8 port.
This -S SKU includes a magnet for the older CS1-M / DS1-M switches, whereas the MBLJ replacement uses CMSG / DMSG / EMSG sensors. The MALJ uses threaded covers, while the MBLJ upgrades to a riveted rolling-packed body. Remember, the rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. Impact is softened by a fixed rubber bumper, as there is no adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X120-30-S |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Adjustable window | 90 – 120 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 MBLJ20X120-30-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 MBLJ20X120-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×120 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 90–120 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 MALJ20X120-30-S Is Used
PCB Router Z-Axis Stop
Dial the 90-120mm window to set the exact cutting depth on a desktop PCB router, preventing the 8mm rod from crashing the spindle into the bed.
Small-Part Ejector
Adjust the forward position on a small plastic part ejection station, allowing a 30mm trim to time the release without reprogramming the PLC.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S with MBLJ20X120-30-S
To replace the MALJ20X120-30-S, order the MBLJ20X120-30-S. Confirm the 20mm bore, 120mm stroke, 30mm adjust code, PT G1/8 port, M8x1.25 rod thread, and FA/LB mounting (there is no back-cover or SDB option). The -S magnet means your old CS1-M / DS1-M switches must change to CMSG / DMSG / EMSG on the new cylinder. At 120mm stroke, watch rod-to-side-load bending on this 8mm rod.
Upgrade checklist
- ✓ Order the MBLJ20X120-30-S (same bore/stroke/adjust)
- ✓ Same 90–120 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 MBLJ20X120-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-30-S FAQ
Yes, the MALJ20X120-30-S is discontinued. The direct replacement is the MBLJ20X120-30-S, which matches the 20mm bore, 120mm stroke, 30mm adjust code, and G1/8 port. You will need to upgrade your sensors from the old CS1-M / DS1-M to the CMSG / DMSG / EMSG family.
The 30mm adjuster lets you shorten the stroke from 120mm down to 90mm. It acts as a travel stop, not a lock; it will not hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X120-30-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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