This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X25-30S, 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 MALJ20X25-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-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 -5 to 25 mm. This model is discontinued — the direct replacement is the MBLJ20X25-30-S.
- BoreØ20 mm
- Stroke25 mm
- Adjust window-5–25 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X25-30-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 MALJ20X25-30-S
The AirTAC MALJ20X25-30-S is a discontinued double-acting mini cylinder with a 20mm bore and 25mm stroke. It offers a usable travel window of 0-25mm via the 30mm rear adjuster. The direct replacement is the MBLJ20X25-30-S.
The MBLJ20X25-30-S upgrade retains the G1/8 port, M8x1.25 rod thread, and 32kgf max force. The old threaded covers are replaced by a riveted rolling-packed body. The -S magnet changes sensor compatibility from CS1-M/DS1-M to CMSG/DMSG/EMSG. The rear adjuster is a travel stop, not a lock; it sets the end position without holding the load pneumatically.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X25-30-S |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Adjustable window | -5 – 25 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 MBLJ20X25-30-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 MBLJ20X25-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×25 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a -5–25 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 MALJ20X25-30-S Is Used
Connector Insertion Jig
Adjusts reach in a PCB header insertion jig, trimming the stroke window to prevent crushing delicate housings during the final 0-25mm approach.
Micro-Valve Tapping Head
Fine-tunes the downward travel on a small valve tapping head, ensuring the 20mm bore stops precisely before bottoming out the thread tap.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-S with MBLJ20X25-30-S
To replace this MALJ20X25-30-S, order the MBLJ20X25-30-S. Confirm the 20mm bore, 25mm stroke, 30mm adjust code, PT G1/8 port, M8x1.25 rod thread, and FA/LB mounting (no back cover or SDB). The -S magnet requires switching from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors. The adjuster sets end position but does not hold load without air.
The 30mm adjust code on a 25mm stroke allows a 0-25mm window for exact reach tuning.
Upgrade checklist
- ✓ Order the MBLJ20X25-30-S (same bore/stroke/adjust)
- ✓ Same -5–25 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 MBLJ20X25-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X25-30-S FAQ
Yes, the MALJ20X25-30-S is discontinued. The direct replacement is the MBLJ20X25-30-S, which matches the 20mm bore, 25mm stroke, 30mm adjust code, G1/8 port, and 32kgf max force, but uses a riveted body and CMSG/DMSG/EMSG sensors.
The 30mm adjust code lets you trim the 25mm stroke down to a 0-25mm usable window. It acts as a travel stop, not a lock, and cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X25-30-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 MALJ20X25-30-S → MBLJ20X25-30-S)
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