This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-50, 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 MALJ20X450-50
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 50 mm, giving a usable end-position window from 400 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-50.
- BoreØ20 mm
- Stroke450 mm
- Adjust window400–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-50
- 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 MALJ20X450-50
The AirTAC MALJ20X450-50 is a discontinued double-acting mini cylinder with a 50 mm rear stroke adjuster, yielding a usable 400-450 mm end-position window. The direct replacement is the MBLJ20X450-50, matching the G1/8 port and 32 kgf max force.
This non-standard 450 mm stroke exceeds the 300 mm catalog maximum, making it a made-to-order item. Two upgrade facts apply: the MALJ uses threaded covers and a fixed rubber bumper, while the MBLJ features a riveted rolling-packed body. Because this SKU lacks the -S magnet, it cannot accept CS1-M or DS1-M position sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-50 |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 400 – 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 MBLJ20X450-50 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 MBLJ20X450-50 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×450 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 400–450 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 MALJ20X450-50 Is Used
Textile Loom Tensioner
Trims the rear stopper by up to 50 mm to fine-tune fabric take-up depth on long looms, preventing overtension while avoiding external stop blocks.
Thin-Wall Tube Depaneler
Sets a precise end position to cut delicate aluminum tubes, where the fixed rubber bumper absorbs the 450 mm stroke impact without air cushions.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50 with MBLJ20X450-50
To replace this MALJ20X450-50, order the MBLJ20X450-50. Confirm the 20 mm bore, 450 mm stroke, 50 mm adjust code, G1/8 PT port, and FA or LB mounting (no back cover or SDB allowed). Since there is no -S magnet, you cannot mount a sensor without upgrading to a CMSG-equipped MBLJ. The rear screw is a travel stop, not a lock; it cannot hold a load without live air.
At 450 mm, the 8 mm rod is highly susceptible to side-load bending; use guided rails to prevent rod damage.
Upgrade checklist
- ✓ Order the MBLJ20X450-50 (same bore/stroke/adjust)
- ✓ Same 400–450 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 MBLJ20X450-50 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-50 FAQ
Yes, the MALJ20X450-50 is discontinued. The direct replacement is the MBLJ20X450-50, which matches the 20 mm bore, 450 mm stroke, 50 mm adjuster, and G1/8 port. The MBLJ upgrades the threaded covers to a riveted rolling-packed body.
The 50 mm rear adjuster is a travel stop, not a lock; it sets the 400-450 mm window but cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-50 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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