This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X50-40, 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 MALJ20X50-40
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 40 mm, giving a usable end-position window from 10 to 50 mm. This model is discontinued — the direct replacement is the MBLJ20X50-40.
- BoreØ20 mm
- Stroke50 mm
- Adjust window10–50 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X50-40
- 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 MALJ20X50-40
The AirTAC MALJ20X50-40 is a discontinued double-acting mini cylinder with a 20 mm bore, 50 mm stroke, and a 40 mm rear travel adjuster. This yields a usable end-position window of 10-50 mm. The direct replacement is the MBLJ20X50-40.
This SKU lacks the -S magnet, so it cannot accept a position sensor. The adjuster sets end travel but does not lock the load without live air. Upgrading to the MBLJ20X50-40 moves you from threaded covers to a riveted body. The fixed rubber bumper softens impact, but remember this adjustable stroke is not an adjustable cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X50-40 |
| Bore size | Ø20 mm |
| Stroke | 50 mm |
| Adjustable window | 10 – 50 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 MBLJ20X50-40 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 MBLJ20X50-40 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×50 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 10–50 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 MALJ20X50-40 Is Used
Dispenser Valve Timing
Trim the rear stopper by up to 40 mm to fine-tune the open stroke on an adhesive dispensing valve, ensuring precise shot volume without reprogramming the PLC.
Light Leaf Spring Bender
Set a custom bending depth for small leaf springs, relying on the 132 N pull force to form the metal while preventing a full 50 mm overstroke.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40 with MBLJ20X50-40
To replace this MALJ20X50-40, order the MBLJ20X50-40. Confirm the 20 mm bore, 50 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and FA/LB mounting. Because this SKU has no -S magnet, it cannot take a sensor; if you need sensing on the new MBLJ, specify -S for CMSG/DMSG/EMSG switches.
The rear adjuster is a travel stop, not a lock.
Upgrade checklist
- ✓ Order the MBLJ20X50-40 (same bore/stroke/adjust)
- ✓ Same 10–50 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 MBLJ20X50-40 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-40 FAQ
Yes, the MALJ20X50-40 is discontinued. The direct replacement is the MBLJ20X50-40, which matches the 20 mm bore, 50 mm stroke, 40 mm adjuster, G1/8 port, and force. The MBLJ upgrades the construction to a riveted rolling-packed body.
The -40 adjuster lets you trim the rear travel up to 40 mm, creating a 10-50 mm usable stroke window. It acts as a travel stop, not a load lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X50-40 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 MALJ20X50-40 → MBLJ20X50-40)
Tell us the quantity and destination — we quote the direct MBLJ20X50-40 replacement with price, stock and lead time, usually within 7-8 hours.