This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X30-20S, 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 MALJ20X30-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-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 10 to 30 mm. This model is discontinued — the direct replacement is the MBLJ20X30-20-S.
- BoreØ20 mm
- Stroke30 mm
- Adjust window10–30 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X30-20-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 MALJ20X30-20-S
The AirTAC MALJ20X30-20-S is a discontinued double-acting double-rod mini cylinder with a 20mm bore and 30mm stroke. It provides a usable extension window of 10-30mm via its 20mm rear adjuster. The direct replacement is the MBLJ20X30-20-S, matching the bore, stroke, force, and G1/8 port.
The rear adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load without live air. End impact is softened by a fixed rubber bumper, meaning there is no adjustable air cushion. This MALJ uses threaded covers and a CS1-M/DS1-M magnet sensor, while the MBLJ upgrade features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X30-20-S |
| Bore size | Ø20 mm |
| Stroke | 30 mm |
| Adjustable window | 10 – 30 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 MBLJ20X30-20-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 MBLJ20X30-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×30 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 10–30 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 MALJ20X30-20-S Is Used
Connector Insertion Depth
Fine-tune the insertion depth of a 20mm bore actuator on an automotive connector press, ensuring pins seat fully without bottoming out against the fixed rubber bumper.
Dispensing Valve Tensioning
Adjust the end position on a pneumatic dispensing valve to maintain exact standoff distance for epoxy bead application, leveraging the compact 8mm rod and M8x1.25 thread.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-S with MBLJ20X30-20-S
To replace the MALJ20X30-20-S, order the exact direct replacement MBLJ20X30-20-S. Confirm the 20mm bore, 30mm stroke, 20mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB). The -S magnet changes sensor families from CS1-M/DS1-M to CMSG/DMSG/EMSG.
Remember the adjuster is a stop, not a lock.
Upgrade checklist
- ✓ Order the MBLJ20X30-20-S (same bore/stroke/adjust)
- ✓ Same 10–30 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 MBLJ20X30-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20-S FAQ
Yes, the MALJ20X30-20-S is discontinued. The direct replacement is the MBLJ20X30-20-S, which matches the 20mm bore, 30mm stroke, 20mm adjust code, G1/8 port, and mounting. The MBLJ uses a riveted rolling-packed body instead of threaded covers, and its -S magnet requires CMSG/DMSG/EMSG sensors instead of the older CS1-M/DS1-M.
The 20mm rear adjuster allows you to trim the 30mm stroke down to a 10-30mm usable window. Note that the adjuster is a travel stop, not a lock; it will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X30-20-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 MALJ20X30-20-S → MBLJ20X30-20-S)
Tell us the quantity and destination — we quote the direct MBLJ20X30-20-S replacement with price, stock and lead time, usually within 7-8 hours.