This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-75, 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 MALJ20X450-75
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 75 mm, giving a usable end-position window from 375 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-75.
- BoreØ20 mm
- Stroke450 mm
- Adjust window375–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-75
- 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 MALJ20X450-75
The AirTAC MALJ20X450-75 is a discontinued adjustable-stroke mini cylinder with a 20mm bore and 450mm stroke. A rear screw lets you trim up to 75mm, giving a usable end-position window of 375-450mm. The direct replacement is the MBLJ20X450-75, matching the bore, stroke, adjust code, and G1/8 port.
This non-standard 450mm stroke exceeds the 300mm catalog maximum, meaning it was a made-to-order item. Because this SKU lacks the -S magnet, it cannot accept a position sensor. The rear adjuster acts as a hard travel stop to fine-tune reach, but it will not hold a load without live air. Upgrading to the MBLJ20X450-75 moves you from threaded covers to a riveted rolling-packed body.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-75 |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 375 – 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 MBLJ20X450-75 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 MBLJ20X450-75 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×450 | Nominal stroke length in mm. |
| -75 | Adjustable amount: trim the end to a 375–450 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 MALJ20X450-75 Is Used
Wire Harness Routing Jig
Sets a precise end-stop for taping harnesses in automotive harness boards, where the fixed rubber bumper absorbs the end impact without needing a sensor.
Thin Film Web Guide
Trims the 75mm rear stroke to align delicate film webs in packaging converting equipment, preventing web tears via a dialed mechanical stop.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75 with MBLJ20X450-75
To replace the MALJ20X450-75, order the MBLJ20X450-75. Confirm the 20mm bore, 450mm stroke, 75mm adjust code, G1/8 port, and PT thread. Mounting is Basic, FA, or LB only; there is no back-cover or SDB option. Because this unit has no -S magnet, it cannot take a sensor. The MBLJ upgrade switches the switch family from CS1-M/DS1-M to CMSG/DMSG/EMSG if you add a magnet. The adjuster is a stop, not a lock.
At 450mm, the 8mm rod is highly susceptible to side-load bending; guide the load externally to prevent rod failure.
Upgrade checklist
- ✓ Order the MBLJ20X450-75 (same bore/stroke/adjust)
- ✓ Same 375–450 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 MBLJ20X450-75 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75 FAQ
Yes, the MALJ20X450-75 is discontinued. The direct replacement is the MBLJ20X450-75, matching the 20mm bore, 450mm stroke, 75mm adjust code, and G1/8 port. The MBLJ upgrades the body from threaded covers to a riveted rolling-packed design.
The 75mm adjust code creates a usable stroke window of 375-450mm. The rear adjuster is a travel stop only, not a lock; it cannot hold a load without live air. This SKU has no magnet and cannot take a sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-75 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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