This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X125-20, 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 MALJ20X125-20
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 105 to 125 mm. This model is discontinued — the direct replacement is the MBLJ20X125-20.
- BoreØ20 mm
- Stroke125 mm
- Adjust window105–125 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X125-20
- 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 MALJ20X125-20
The AirTAC MALJ20X125-20 is a discontinued adjustable-stroke mini cylinder. The direct replacement is the MBLJ20X125-20, which matches the 20mm bore, 125mm stroke, 20mm adjust code, G1/8 port, and mounting footprint. By turning the rear stopper screw, you trim up to 20mm of travel, giving a usable end-position window of 105-125mm without adding external stops.
This SKU has no magnet (-S code absent), so it cannot accept a position sensor. The adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. End impact is absorbed by a fixed rubber bumper, not an adjustable air cushion. The original MALJ uses threaded covers and the older CS1-M/DS1-M sensor family, while the MBLJ upgrade features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X125-20 |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Adjustable window | 105 – 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 MBLJ20X125-20 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 MBLJ20X125-20 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 105–125 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 MALJ20X125-20 Is Used
Micro-Pneumatic Press
Use the 20mm bore's 132N pull to seat small electronic connectors, trimming 20mm at the rear to accommodate varying PCB thicknesses on the same line.
Filament Winder Gate
Adjust the end-of-stroke position to regulate the fiber laydown point on a composite winder, using the fixed rubber bumper to soften the stroke end.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20 with MBLJ20X125-20
To replace this MALJ20X125-20, order the MBLJ20X125-20. Confirm your 20mm bore, 125mm stroke, 20mm adjust code, PT thread form, and FA/LB mounting (this series uses no back cover or SDB). Because this SKU lacks a magnet, you cannot add a sensor; if you need position detection, step up to an MBLJ20X125-20S and use the CMSG/DMSG/EMSG switches. Remember the rear adjuster is a stop, not a lock, so fit an external lock for held loads.
At 125mm stroke, prevent rod bending by ensuring rigid guidance and avoiding side loads.
Upgrade checklist
- ✓ Order the MBLJ20X125-20 (same bore/stroke/adjust)
- ✓ Same 105–125 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 MBLJ20X125-20 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-20 FAQ
Yes, the MALJ20X125-20 is discontinued. The direct replacement is the MBLJ20X125-20, matching the 20mm bore, 125mm stroke, 20mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design and uses CMSG/DMSG/EMSG sensors instead of the older CS1-M/DS1-M.
The -20 adjust code lets you trim up to 20mm at the rear, creating a usable stroke window of 105-125mm. The adjuster is a travel stop, not a lock, so it cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X125-20 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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