This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X500-20-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 MALJ20X500-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-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 480 to 500 mm. This model is discontinued — the direct replacement is the MBLJ20X500-20-S.
- BoreØ20 mm
- Stroke500 mm
- Adjust window480–500 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X500-20-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 MALJ20X500-20-S
The AirTAC MALJ20X500-20-S is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and 500mm stroke. It features a rear adjuster letting you trim up to 20mm, providing a usable end-position window of 480-500mm. This non-standard 500mm stroke exceeds the 300mm catalog maximum, meaning it was produced as a special made-to-order item. The direct replacement is the MBLJ20X500-20-S, matching the bore, stroke, adjuster, and G1/8 port.
The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. The fixed rubber bumper softens end impact. For position sensing, the -S magnet on this MALJ works with CS1-M / DS1-M switches, while the MBLJ replacement uses CMSG / DMSG / EMSG sensors. The original threaded covers are upgraded to a riveted rolling-packed body on the MBLJ.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X500-20-S |
| Bore size | Ø20 mm |
| Stroke | 500 mm |
| Adjustable window | 480 – 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 MBLJ20X500-20-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 MBLJ20X500-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×500 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 480–500 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 MALJ20X500-20-S Is Used
Dispense head positioning
Fine-tune the end-of-stroke cutoff on an adhesive dispensing head, ensuring the 500mm travel stops precisely before a mechanical hard limit.
Film web edge guide
Trim the 20mm rear stop to set exact web-edge contact on a packaging machine, preventing over-travel while the fixed rubber bumper absorbs the end impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S with MBLJ20X500-20-S
To replace the MALJ20X500-20-S, order the exact direct replacement MBLJ20X500-20-S. Confirm the 20mm bore, 500mm non-standard stroke, 20mm adjust code, PT G1/8 port, M8x1.25 rod thread, and basic mounting (no back cover or SDB). The -S magnet requires switching from CS1-M / DS1-M to CMSG / DMSG / EMSG sensors. The adjuster is a stop, not a lock.
At 500mm, the 8mm rod is prone to bending under side loads—keep the load guided and aligned to prevent premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X500-20-S (same bore/stroke/adjust)
- ✓ Same 480–500 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 MBLJ20X500-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S FAQ
Yes, the MALJ20X500-20-S is discontinued. The direct replacement is the MBLJ20X500-20-S, which matches the 20mm bore, 500mm stroke, 20mm adjust code, and G1/8 port. You will need to update your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG switches.
The -20 adjuster provides a usable stroke window of 480-500mm. It functions as a travel stop to set the end position, not a lock, and will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X500-20-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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-20-S → MBLJ20X500-20-S)
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