This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X125-50S, 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 MALJ20X125-50-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-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 75 to 125 mm. This model is discontinued — the direct replacement is the MBLJ20X125-50-S.
- BoreØ20 mm
- Stroke125 mm
- Adjust window75–125 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X125-50-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 MALJ20X125-50-S
The AirTAC MALJ20X125-50-S is a discontinued double-acting mini cylinder with a 20mm bore and 125mm stroke. It features a rear screw stopper that lets you trim the end position by up to 50mm, creating a usable stroke window from 75 to 125mm. The direct replacement is the MBLJ20X125-50-S, which matches the bore, stroke, adjust code, port, and mounting.
This -S variant has a magnet for the older CS1-M/DS1-M switches, while the MBLJ replacement uses CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers, whereas the MBLJ features a riveted rolling-packed body. It uses a fixed rubber bumper, not an adjustable air cushion, and the adjuster is a travel stop, not a lock. It cannot hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X125-50-S |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Adjustable window | 75 – 125 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 MBLJ20X125-50-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 MBLJ20X125-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 75–125 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 MALJ20X125-50-S Is Used
Wire Stripping Clamp
Fine-tune the jaw closure distance on an automated wire stripping line, relying on the fixed rubber bumper to soften the end impact.
Dispenser Valve Height
Adjust the downward travel of a pneumatic adhesive dispenser, ensuring the nozzle clears varying board heights without reprogramming the PLC.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-S with MBLJ20X125-50-S
To replace the MALJ20X125-50-S, order the MBLJ20X125-50-S. Confirm the 20mm bore, 125mm stroke, 50mm adjust code, G1/8 port, and M8x1.25 rod thread. Mounting is FA or LB only; there is no back cover or SDB option. The -S magnet changes your sensor family from CS1-M/DS1-M to CMSG/DMSG/EMSG. Remember the adjuster is a stop, not a lock.
If you need less force, the 20mm bore (157N) is the smallest available option in this series. At 125mm stroke, keep the rod guided to prevent side-load bending.
Upgrade checklist
- ✓ Order the MBLJ20X125-50-S (same bore/stroke/adjust)
- ✓ Same 75–125 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 MBLJ20X125-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-50-S FAQ
Yes, the MALJ20X125-50-S is discontinued. The direct replacement is the MBLJ20X125-50-S, which matches the 20mm bore, 125mm stroke, 50mm adjust code, and G1/8 port.
The 50mm adjust code lets you trim the 125mm stroke back to 75mm, giving a usable 75-125mm window.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X125-50-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
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