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-S, 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-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S 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-S.
- BoreØ20 mm
- Stroke450 mm
- Adjust window410–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-40-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 MALJ20X450-40-S
The AirTAC MALJ20X450-40-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stroke stopper. It trims up to 40 mm at the rear, yielding a usable end-position window of 410-450 mm. The direct replacement is the MBLJ20X450-40-S, matching the bore, stroke, adjust code, G1/8 port, and mounting.
This non-standard 450 mm stroke exceeds the 300 mm max standard, meaning it was made-to-order. Two upgrade facts apply: the MALJ uses threaded covers while the MBLJ uses a riveted rolling-packed body, and the MALJ -S magnet works with CS1-M/DS1-M switches while the MBLJ uses CMSG/DMSG/EMSG. The adjuster is a travel stop, not a lock; it sets the end position but does not hold load without live air. A fixed rubber bumper softens end impact.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-40-S |
| 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-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 MBLJ20X450-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S
| 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-S Is Used
PCB Router Z-Axis Depth Setter
Dials the final plunge depth on a long-stroke router spindle.
Long-Reach Textile Web Guide
Trims the lateral edge position on a fabric slitting line. The 40 mm rear stop adjusts the end point for different fabric widths without swapping hardware.
Carton Flap Folder Stroke Limit
Sets the exact fold depth for varying box sizes on a packaging conveyor. The rear stopper acts as a travel limit, not a load lock, ensuring consistent folding without live air holding force.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S with MBLJ20X450-40-S
To replace this MALJ20X450-40-S, order the direct replacement MBLJ20X450-40-S. Confirm the 20 mm bore, 450 mm non-standard stroke, 40 mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB allowed). Note the sensor family change: the MALJ -S magnet requires CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG. The adjuster is a stop, not a lock, so add an external lock for held loads.
At 450 mm, rod bending and side-load risks are high. Keep the load guided to prevent shaft damage.
Upgrade checklist
- ✓ Order the MBLJ20X450-40-S (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-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-40-S FAQ
Yes, the MALJ20X450-40-S is discontinued. The direct replacement is the MBLJ20X450-40-S, matching the 20 mm bore, 450 mm stroke, 40 mm adjust code, force, G1/8 port, and mounting. The MBLJ upgrades the body to a riveted rolling-packed design and changes the magnet switch family from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The usable adjustable window is 410-450 mm, set by trimming up to 40 mm at the rear. The 450 mm stroke is non-standard and exceeds the 300 mm max standard.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-40-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 MALJ20X450-40-S → MBLJ20X450-40-S)
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