This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X30-20, 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
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20 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.
- BoreØ20 mm
- Stroke30 mm
- Adjust window10–30 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X30-20
- 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
The AirTAC MALJ20X30-20 is a discontinued 20mm bore, double-acting mini cylinder with a 30mm stroke and a 20mm rear adjustable stop. Because this SKU lacks the -S magnet code, it cannot accept a position sensor.
The 20mm adjuster lets you dial the usable end-position window down to 10-30mm without adding external stops. Remember the adjuster is a travel stop, not a lock; it will not hold a load without live air. The fixed rubber bumper softens end impact, but this cylinder has no adjustable pneumatic cushion. Upgrading to the MBLJ moves you from threaded covers to a riveted rolling-packed body.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X30-20 |
| 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 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 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20
| 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 Is Used
PCB ejector pins
Dial the 10-30mm window to precisely push populated circuit boards out of test fixtures without over-traveling and damaging traces.
Small parts escapement
Use the 132N pull force to index plastic caps in a vibratory bowl feeder, adjusting the rear stop to match varying cap heights.
Thin-sheet metal forming
Crimp light aluminum tabs on battery contacts by tuning the stroke stop to guarantee consistent bend depth without bottoming out.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20 with MBLJ20X30-20
To replace the MALJ20X30-20, order the MBLJ20X30-20. Confirm the 20mm bore, 30mm stroke, 20mm adjust code, G1/8 PT port, and FA or LB mounting (no back cover or SDB is used). Since this SKU has no -S magnet, you lose no sensor capability, but note the MBLJ upgrade uses CMSG/DMSG/EMSG switches if you ever add a magnet later. The adjuster sets end position but does not hold the load without air.
If you need to size either way: stepping down is not possible as 20mm is the smallest available bore.
Upgrade checklist
- ✓ Order the MBLJ20X30-20 (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 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X30-20 FAQ
Yes, the MALJ20X30-20 is discontinued. The direct replacement is the MBLJ20X30-20, which matches the 20mm bore, 30mm stroke, 20mm adjuster, G1/8 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design and uses CMSG/DMSG/EMSG sensors if a magnet is added.
The -20 adjust code lets you trim the 30mm stroke to a usable 10-30mm window. The adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X30-20 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 → MBLJ20X30-20)
Tell us the quantity and destination — we quote the direct MBLJ20X30-20 replacement with price, stock and lead time, usually within 7-8 hours.