This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X300-40S, 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 MALJ20X300-40-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 40 mm, giving a usable end-position window from 260 to 300 mm. This model is discontinued — the direct replacement is the MBLJ20X300-40-S.
- BoreØ20 mm
- Stroke300 mm
- Adjust window260–300 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X300-40-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 MALJ20X300-40-S
The AirTAC MALJ20X300-40-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stroke. It provides a usable travel window of 260-300 mm by trimming up to 40 mm at the rear screw. The direct replacement is the MBLJ20X300-40-S, which matches the 20 mm bore, G1/8 port, and 32 kgf max force.
This -S SKU includes a magnet for CS1-M or DS1-M switches; the MBLJ upgrade shifts to CMSG/DMSG/EMSG sensors and swaps the original threaded covers for a riveted rolling-packed body. The fixed rubber bumper softens end impact, but the adjuster is a travel stop, not a lock. At a 300 mm stroke, the 8 mm carbon-steel rod is highly susceptible to side-load bending, so load alignment is critical.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X300-40-S |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Adjustable window | 260 – 300 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 MBLJ20X300-40-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 MBLJ20X300-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×300 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 260–300 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 MALJ20X300-40-S Is Used
PCB Depaneling Saw
Dials the blade cut depth precisely within the 260-300 mm window.
Textile Loom Tensioner
Fine-tunes the guide arm reach on long 300 mm strokes. The rear stopper sets the exact rest position for the yarn guide, while the fixed rubber bumper absorbs the high-speed end impact.
Thin-Film Web Edge Guide
Trims the tracking roller position by up to 40 mm to correct material drift. The lightweight 20 mm bore prevents crushing delicate polymer webs while holding the adjusted end point.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S with MBLJ20X300-40-S
To replace this MALJ20X300-40-S, order the exact MBLJ20X300-40-S direct. Confirm the 20 mm bore, 300 mm stroke, 40 mm adjust code, G1/8 PT port, and FA/LB mounting (there is no back cover or SDB option). 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 300 mm is the absolute maximum standard stroke for a 20 mm bore, making this a non-standard length that demands strict rod-guiding to prevent buckling under side loads.
Upgrade checklist
- ✓ Order the MBLJ20X300-40-S (same bore/stroke/adjust)
- ✓ Same 260–300 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 MBLJ20X300-40-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-40-S FAQ
Yes, the MALJ20X300-40-S is discontinued. The direct replacement is the MBLJ20X300-40-S, matching the 20 mm bore, 300 mm stroke, 40 mm adjust code, and G1/8 port. You will need to swap your CS1-M/DS1-M sensors for CMSG/DMSG/EMSG switches.
The 40 mm adjuster is a travel stop, not a lock, giving a usable stroke window of 260-300 mm. It uses a fixed rubber bumper, not an adjustable air cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X300-40-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 MALJ20X300-40-S → MBLJ20X300-40-S)
Tell us the quantity and destination — we quote the direct MBLJ20X300-40-S replacement with price, stock and lead time, usually within 7-8 hours.