This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X500-30, 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 MALJ20X500-30
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 30 mm, giving a usable end-position window from 470 to 500 mm. This model is discontinued — the direct replacement is the MBLJ20X500-30.
- BoreØ20 mm
- Stroke500 mm
- Adjust window470–500 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X500-30
- 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 MALJ20X500-30
The AirTAC MALJ20X500-30 is a discontinued double-acting, double-rod adjustable-stroke mini cylinder. It trims up to 30 mm at the rear screw, yielding a usable window of 470-500 mm. The direct replacement is the MBLJ20X500-30, matching the bore, stroke, port, and force.
This non-standard 500 mm stroke exceeds the 300 mm standard limit, making it a made-to-order item. It uses a fixed rubber bumper, not an adjustable air cushion. The adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load without live air. This no-magnet SKU cannot take a position sensor. The original MALJ uses threaded covers and a CS1-M / DS1-M magnet family, while the MBLJ upgrade features a riveted rolling-packed body and CMSG / DMSG / EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X500-30 |
| Bore size | Ø20 mm |
| Stroke | 500 mm |
| Adjustable window | 470 – 500 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 MBLJ20X500-30 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 MBLJ20X500-30 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×500 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 470–500 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 MALJ20X500-30 Is Used
Textile Loom Tensioner
Fine-tune the extended reach on a textile loom beam guide, trimming 30 mm to adjust fabric tension precisely without bolting on external stops.
Long-Reach Pneumatic Press
Use the 500 mm reach to clear a wide fixture base in a long-reach pneumatic press, adjusting the end position to accommodate varying part heights.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30 with MBLJ20X500-30
To replace this MALJ20X500-30, order the exact direct replacement MBLJ20X500-30. Confirm the G1/8 port, M8x1.25 rod-end thread, and FA or LB mounting (no back cover or SDB). Because this is a non-magnet SKU, it cannot accept a sensor; upgrading to an MBLJ with an -S code adds a CMSG / DMSG / EMSG switch. The adjuster is a stop, not a lock; add an external lock for held loads.
Because this stroke is 500 mm, be aware of rod-bending under side loads; guide the load to prevent damage.
Upgrade checklist
- ✓ Order the MBLJ20X500-30 (same bore/stroke/adjust)
- ✓ Same 470–500 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 MBLJ20X500-30 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30 FAQ
Yes, the MALJ20X500-30 is discontinued. The direct replacement is the MBLJ20X500-30, which matches the bore, stroke, adjust code, force, and port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The 500 mm stroke is non-standard (exceeding the 300 mm max), and the 30 mm adjuster creates a usable window of 470-500 mm.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X500-30 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 MALJ20X500-30 → MBLJ20X500-30)
Tell us the quantity and destination — we quote the direct MBLJ20X500-30 replacement with price, stock and lead time, usually within 7-8 hours.