This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X40-30, 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 MALJ20X40-30
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30 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 10 to 40 mm. This model is discontinued — the direct replacement is the MBLJ20X40-30.
- BoreØ20 mm
- Stroke40 mm
- Adjust window10–40 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X40-30
- 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 MALJ20X40-30
The AirTAC MALJ20X40-30 is a discontinued double-acting mini cylinder with a 20mm bore and 40mm stroke. It is replaced directly by the MBLJ20X40-30. A rear screw stopper trims up to 30mm, giving a usable end-position window of 10-40mm.
This SKU lacks a magnet (-S) and cannot accept a position sensor. Two upgrade facts apply to the MBLJ replacement: the original MALJ uses threaded covers, while the MBLJ uses a riveted rolling-packed body; and if you later need a sensor, the MBLJ uses CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M. The adjuster is a travel stop, not a lock, and end impact is softened by a fixed rubber bumper.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X40-30 |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Adjustable window | 10 – 40 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 MBLJ20X40-30 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 MBLJ20X40-30 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×40 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 10–40 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 MALJ20X40-30 Is Used
Dispenser Valve Seating
Fine-tunes the downstroke to seat a pneumatic dispensing valve precisely onto a substrate without crushing the workpiece, leveraging the 30mm adjustment window.
Light Wire Tensioner
Adjusts the end-stop to maintain exact tension on a 20AWG wire winding drum, where the 132N pull force provides stable, low-impact retraction.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30 with MBLJ20X40-30
To replace this MALJ20X40-30, specify the MBLJ20X40-30 to match the 20mm bore, 40mm stroke, 30mm adjust code, G1/8 port, M8x1.25 rod thread, and FA/LB mounting (no back cover or SDB). If sizing down, the next smaller MALJ bore is unavailable, making 20mm the minimum. Remember the rear adjuster sets the end position but will not hold a load without live air.
Upgrade checklist
- ✓ Order the MBLJ20X40-30 (same bore/stroke/adjust)
- ✓ Same 10–40 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 MBLJ20X40-30 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-30 FAQ
Yes, the MALJ20X40-30 is discontinued. The direct replacement is the MBLJ20X40-30, which matches the 20mm bore, 40mm stroke, 30mm adjuster, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The -30 adjust code lets you trim up to 30mm at the rear, creating a usable stroke window of 10-40mm. The adjuster is a travel stop only, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X40-30 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 MALJ20X40-30 → MBLJ20X40-30)
Tell us the quantity and destination — we quote the direct MBLJ20X40-30 replacement with price, stock and lead time, usually within 7-8 hours.