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-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 MALJ20X500-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-S 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-S.
- BoreØ20 mm
- Stroke500 mm
- Adjust window470–500 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X500-30-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 MALJ20X500-30-S
The AirTAC MALJ20X500-30-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stop. The 30mm adjuster creates a usable stroke window of 470-500mm. The direct replacement is the MBLJ20X500-30-S, matching the bore, stroke, and G1/8 port.
Because 500mm exceeds the 300mm standard maximum for this bore, this is a non-standard, made-to-order stroke. The adjuster is a travel stop, not a lock; it cannot hold a load without live air. The fixed rubber bumper softens end impact. This MALJ has threaded covers and a -S magnet for CS1-M/DS1-M switches, whereas the MBLJ upgrade features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X500-30-S |
| 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-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 MBLJ20X500-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-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. |
| -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-S Is Used
Thin-Film Web Splicing
Fine-tunes the blade descent position on a flexible packaging splicer; the 30mm rear stop trims the 500mm stroke so the 8mm rod precisely meets the cutting anvil without buckling.
Lab Dispenser Pinning
Adjusts the end-of-stroke reach for a fluid dispensing needle on a 500mm travel axis, ensuring the 132N pull retracts the mechanism clear of the substrate at varying bottle heights.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-S with MBLJ20X500-30-S
To replace the MALJ20X500-30-S, order the exact direct replacement MBLJ20X500-30-S. Confirm the 20mm bore, 500mm stroke, 30mm adjust code, G1/8 port, M8x1.25 rod thread, and PT thread form. Mounting is Basic, FA, or LB only (no back cover or SDB). The -S magnet means you must upgrade your switches from the old CS1-M/DS1-M to the new CMSG/DMSG/EMSG family.
Note that a 500mm stroke on an 8mm rod is highly susceptible to side-load and rod-bending; ensure strict linear guidance. The adjuster sets the end position but does not hold load without air; use an external lock for suspended loads.
Upgrade checklist
- ✓ Order the MBLJ20X500-30-S (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-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-30-S FAQ
Yes, the MALJ20X500-30-S is discontinued. The direct replacement is the MBLJ20X500-30-S, which matches the 20mm bore, 500mm stroke, 30mm adjust code, and G1/8 port. You must upgrade your sensors: the old MALJ -S magnet used CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG switches. The MBLJ also upgrades the threaded covers to a riveted rolling-packed body.
The 30mm adjust code lets you trim the rear end position, creating a usable stroke window of 470-500mm. The adjuster is a travel stop, not a lock; it cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X500-30-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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