This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-20-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 MALJ20X450-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-S 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 430 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-20-S.
- BoreØ20 mm
- Stroke450 mm
- Adjust window430–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-20-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 MALJ20X450-20-S
The AirTAC MALJ20X450-20-S is a discontinued double-acting, double-rod adjustable-stroke mini cylinder. A rear stopper screw trims up to 20mm, yielding a usable 430-450mm window. The direct replacement is the MBLJ20X450-20-S, retaining the G1/8 port, M8 rod and 32kgf max force.
This non-standard 450mm stroke exceeds the 300mm standard limit, requiring made-to-order handling. The adjuster sets the end position but is a travel stop, not a lock; it will not hold a load without live air. The fixed rubber bumper softens end impact. The -S magnet uses older CS1-M/DS1-M switches, while the MBLJ upgrade moves to CMSG/DMSG/EMSG sensors inside a riveted rolling-packed body instead of threaded covers.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-20-S |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 430 – 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 MBLJ20X450-20-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 MBLJ20X450-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-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. |
| -20 | Adjustable amount: trim the end to a 430–450 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 MALJ20X450-20-S Is Used
PCB Depaneling Router
Dials the cut depth on a 450mm travel axis.
Thin Film Sputter Door
Sets the exact open reach for a vacuum chamber access door. The 20mm rear stopper adjustment trims the 450mm stroke to hit the fixture precisely, avoiding custom spacers.
Label Applicator Tamp
Controls the tamp pad position on a long 450mm cycle. The 132N pull retracts the pad safely while the 430mm minimum stroke ensures full retraction clearance for tall packaging.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-S with MBLJ20X450-20-S
Replace this MALJ20X450-20-S with the direct replacement MBLJ20X450-20-S. Confirm the 20mm bore, 450mm non-standard stroke, 20mm adjust code, G1/8 port, PT threads, and Basic/FA/LB mounting (no back cover or SDB). The -S magnet requires switching from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors. At 450mm, rod side-load and bending risks are high—guide the load to prevent rod damage. The adjuster is a stop, not a lock.
Upgrade checklist
- ✓ Order the MBLJ20X450-20-S (same bore/stroke/adjust)
- ✓ Same 430–450 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 MBLJ20X450-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20-S FAQ
Yes, the MALJ20X450-20-S is discontinued. The direct replacement is the MBLJ20X450-20-S, matching the 20mm bore, 450mm stroke, 20mm adjust code, G1/8 port, and mounting. You must upgrade the -S magnet switches from the older CS1-M/DS1-M to the current CMSG/DMSG/EMSG family.
The 20mm adjuster is a travel stop that lets you shorten the end position from 450mm down to 430mm. It does not lock the load without live air; use an external lock for holding.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-20-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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