This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-40, 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 MALJ20X450-40
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40 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 410 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-40.
- BoreØ20 mm
- Stroke450 mm
- Adjust window410–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-40
- 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 MALJ20X450-40
The AirTAC MALJ20X450-40 is a discontinued, double-acting, adjustable-stroke mini cylinder with a 20mm bore and 450mm stroke. A rear screw stopper lets you trim up to 40mm, yielding a usable end-position window of 410-450mm. This non-standard stroke (exceeding the 300mm catalog maximum) is a made-to-order item.
The direct replacement is the MBLJ20X450-40, matching the bore, stroke, adjust code, and force. Upgrading moves you from threaded covers to a riveted rolling-packed body. Because this SKU lacks the -S magnet, it cannot accept a position sensor; if you need a switch, the MBLJ replacement with an -S code uses the newer CMSG/DMSG/EMSG family instead of the older CS1-M/DS1-M. Remember, the rear adjuster is a travel stop, not a lock; it will not hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-40 |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 410 – 450 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 MBLJ20X450-40 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 MBLJ20X450-40 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×450 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 410–450 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 MALJ20X450-40 Is Used
PCB Router Z-Axis Depth Setter
Dials in the exact 410-450mm vertical reach on a custom PCB depaneling router. The 132N pull force reliably retracts the spindle head without over-stressing the 8mm rod, while the stopper dials the exact cutting depth.
Long-Stroke Wire Feeder Guide
Adjusts the material rest position on a long-bed wire bending machine.
Automated Leak-Test Fixture
Positions a sealing head over deep-drawn aluminum cups. The 410-450mm window lets operators fine-tune the seal pressure against the cup rim, relying on the fixed rubber bumper to soften the 157N end-of-stroke impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40 with MBLJ20X450-40
To replace the MALJ20X450-40, specify the MBLJ20X450-40. Confirm the 20mm bore, 450mm stroke, 40mm adjust code, G1/8 port, M8x1.25 rod-end thread, and PT thread form. Mounting is Basic, FA, or LB only (no back cover or SDB). Since this SKU has no -S magnet, it cannot take a sensor; order the -S version of the MBLJ if you need CMSG/DMSG/EMSG switches. The rear adjuster sets the end position but does not lock the load.
Because the 450mm stroke is non-standard and exceeds the 300mm max standard, be mindful of rod bending on long strokes—ensure adequate side-load support to prevent rod deflection during extension.
Upgrade checklist
- ✓ Order the MBLJ20X450-40 (same bore/stroke/adjust)
- ✓ Same 410–450 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 MBLJ20X450-40 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40 FAQ
Yes, the MALJ20X450-40 is discontinued. The direct replacement is the MBLJ20X450-40, which matches the 20mm bore, 450mm stroke, 40mm adjust code, G1/8 port, and force. The MBLJ upgrades the body to a riveted rolling-packed design. Because this specific MALJ SKU lacks the -S magnet, it cannot accept a position sensor; if you need sensing, specify an MBLJ with the -S option to use CMSG/DMSG/EMSG switches.
The -40 adjust code allows you to trim the 450mm stroke by up to 40mm at the rear, creating a usable end-position window of 410-450mm. Note that the 450mm stroke exceeds the 300mm standard maximum, making it a non-standard, made-to-order item. The adjuster is a travel stop, not a lock; it will not hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-40 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
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