This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X250-30S, 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 MALJ20X250-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-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 220 to 250 mm. This model is discontinued — the direct replacement is the MBLJ20X250-30-S.
- BoreØ20 mm
- Stroke250 mm
- Adjust window220–250 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X250-30-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 MALJ20X250-30-S
The AirTAC MALJ20X250-30-S is a discontinued 20mm bore, double-acting mini cylinder with a 250mm stroke and a 30mm rear adjustable travel stop. This yields a usable end-position window of 220-250mm. The direct replacement is the MBLJ20X250-30-S, matching the bore, stroke, G1/8 port and 32kgf max force.
The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. This -S variant uses older CS1-M/DS1-M switches, whereas the MBLJ upgrade takes CMSG/DMSG/EMSG sensors. The original MALJ has threaded covers, while the MBLJ features a riveted rolling-packed body. Impact is absorbed by a fixed rubber bumper, meaning there is no adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X250-30-S |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Adjustable window | 220 – 250 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 MBLJ20X250-30-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 MBLJ20X250-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×250 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 220–250 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 MALJ20X250-30-S Is Used
Wire Cut Tensioner
Fine-tune the 250mm travel limit on an automated wire cutter to vary cut lengths precisely, relying on the fixed rubber bumper to absorb the end impact.
Small Parts Ejector
Adjust the rear stop to shorten the ejection stroke for a packaging machine indexer, preventing the rod from striking the machine frame.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S with MBLJ20X250-30-S
To replace the MALJ20X250-30-S, install the MBLJ20X250-30-S. Confirm the 20mm bore, 250mm stroke, 30mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB). The -S magnet changes your sensor family from CS1-M/DS1-M to CMSG/DMSG/EMSG. The adjuster sets end position but does not hold load without air.
At 250mm stroke, minimize side-load on the M8 rod to prevent premature seal wear and rod bending.
Upgrade checklist
- ✓ Order the MBLJ20X250-30-S (same bore/stroke/adjust)
- ✓ Same 220–250 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 MBLJ20X250-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S FAQ
Yes, the MALJ20X250-30-S is discontinued. The direct replacement is the MBLJ20X250-30-S, which matches the 20mm bore, 250mm stroke, 30mm adjuster, G1/8 port, and 32kgf max force. You will need to upgrade your sensors from CS1-M/DS1-M to the CMSG/DMSG/EMSG family.
The 30mm rear adjuster provides a usable stroke window of 220-250mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X250-30-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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-30-S → MBLJ20X250-30-S)
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