This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X500-50-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 MALJ20X500-50-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-S 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 450 to 500 mm. This model is discontinued — the direct replacement is the MBLJ20X500-50-S.
- BoreØ20 mm
- Stroke500 mm
- Adjust window450–500 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X500-50-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 MALJ20X500-50-S
The AirTAC MALJ20X500-50-S is a discontinued double-acting, double-rod mini cylinder with a 50 mm rear adjustable stroke stopper. The direct replacement is the MBLJ20X500-50-S, matching the bore, stroke, adjust code, G1/8 port, and FA/LB mounting.
This 500 mm stroke exceeds the 300 mm standard for bore 20, making it a non-standard, made-to-order item. The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. The fixed rubber bumper softens end impact but is not an adjustable cushion. Upgrading to the MBLJ changes the body from threaded covers to a riveted rolling-packed design, and the -S magnet switches from the older CS1-M/DS1-M switches to the modern CMSG/DMSG/EMSG family.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X500-50-S |
| Bore size | Ø20 mm |
| Stroke | 500 mm |
| Adjustable window | 450 – 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 MBLJ20X500-50-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 MBLJ20X500-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-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. |
| -50 | Adjustable amount: trim the end to a 450–500 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 MALJ20X500-50-S Is Used
Film web tracking arm
Fine-tune a long-stroke tracking arm on a packaging film web to correct material stretch, using the 50 mm rear stop to set precise end limits without live air holding the load.
Dispenser nozzle depth stop
Adjust the drop depth of a low-viscosity adhesive dispenser nozzle over a 500 mm travel, relying on the fixed rubber bumper to soften the rapid end impact during high-speed cycling.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-S with MBLJ20X500-50-S
Replace this MALJ20X500-50-S directly with the MBLJ20X500-50-S. Confirm the 20 mm bore, 500 mm stroke, 50 mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB allowed). The -S magnet requires changing from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors. Because the 500 mm stroke is non-standard and far exceeds the 300 mm max standard, the 8 mm rod is highly susceptible to bending under side loads; use precise guide rails to prevent rod damage and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X500-50-S (same bore/stroke/adjust)
- ✓ Same 450–500 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 MBLJ20X500-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-50-S FAQ
Yes, the MALJ20X500-50-S is discontinued. The direct replacement is the MBLJ20X500-50-S, which matches the 20 mm bore, 500 mm stroke, 50 mm adjust code, G1/8 port, and FA/LB mounting. The upgrade changes the body from threaded covers to a riveted rolling-packed design, and the -S magnet switches from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors.
The 50 mm adjust code lets you trim the rear end position, creating a usable stroke window of 450-500 mm. The adjuster is a travel stop, not a lock. It uses a fixed rubber bumper, not an adjustable cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X500-50-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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