This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X120-50-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 MALJ20X120-50-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S 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 70 to 120 mm. This model is discontinued — the direct replacement is the MBLJ20X120-50-S.
- BoreØ20 mm
- Stroke120 mm
- Adjust window70–120 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X120-50-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 MALJ20X120-50-S
The AirTAC MALJ20X120-50-S is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and 120mm stroke. Its rear adjuster trims up to 50mm, giving a usable end-position window of 70-120mm. The direct replacement is the MBLJ20X120-50-S, matching the bore, stroke, adjust code, and G1/8 port.
This -S model uses a CS1-M or DS1-M magnetic switch, whereas the MBLJ upgrade uses CMSG/DMSG/EMSG sensors. The original MALJ has threaded covers, while the MBLJ features a riveted rolling-packed body. The fixed rubber bumper absorbs end-of-stroke impact, but the rear adjuster acts only as a travel stop, not a lock, meaning it cannot hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X120-50-S |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Adjustable window | 70 – 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 MBLJ20X120-50-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 MBLJ20X120-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-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. |
| -50 | Adjustable amount: trim the end to a 70–120 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 MALJ20X120-50-S Is Used
PCB Depaneling Saw
Dials the blade return stroke between 70-120mm to clear fixture posts without repositioning the entire saw head.
Textile Loom Takedown
Fine-tunes the fabric pull length on the 20mm bore, using the 132N pull force to maintain consistent web tension.
Small-Part Ejector Chute
Adjusts the pusher end-stop up to 50mm shorter to drop parts into varying bin depths without adding external spacers.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S with MBLJ20X120-50-S
To replace the MALJ20X120-50-S, order the direct replacement MBLJ20X120-50-S. Confirm the 20mm bore, 120mm stroke, 50mm adjust code, G1/8 port, PT thread, and magnet are retained. Mounting is FA or LB only, as there is no back-cover or SDB option. Remember the adjuster sets the end position but does not hold load without air; add an external lock for held loads.
Since the 120mm stroke is relatively long for a 20mm bore, use a guide to prevent rod bending under side loads.
Upgrade checklist
- ✓ Order the MBLJ20X120-50-S (same bore/stroke/adjust)
- ✓ Same 70–120 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 MBLJ20X120-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S FAQ
Yes, the MALJ20X120-50-S is discontinued. The direct replacement is the MBLJ20X120-50-S, which matches the 20mm bore, 120mm stroke, 50mm adjust code, and G1/8 port. You will need to upgrade your sensors from the old CS1-M/DS1-M switches to the new CMSG/DMSG/EMSG family.
The 50mm adjuster is a travel stop that lets you shorten the usable stroke window to 70-120mm. It is not a lock and cannot hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X120-50-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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-50-S → MBLJ20X120-50-S)
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