This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X350-40-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 MALJ20X350-40-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-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 310 to 350 mm. This model is discontinued — the direct replacement is the MBLJ20X350-40-S.
- BoreØ20 mm
- Stroke350 mm
- Adjust window310–350 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X350-40-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 MALJ20X350-40-S
The AirTAC MALJ20X350-40-S is a discontinued adjustable-stroke, double-acting double-rod mini cylinder. A rear stopper screw trims up to 40 mm, creating a usable 310-350 mm end-position window. The direct replacement is the MBLJ20X350-40-S, matching the 20 mm bore, 350 mm stroke, G1/8 port, and FA/LB mounting.
This 350 mm stroke exceeds the 20 mm bore's 300 mm standard maximum, making it a non-standard, made-to-order unit. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. The fixed rubber bumper softens end impact, but unlike the current-line MBLJ with its riveted rolling-packed body, this MALJ uses older threaded covers. The -S magnet pairs with CS1-M / DS1-M switches, whereas the MBLJ upgrade uses CMSG / DMSG / EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X350-40-S |
| Bore size | Ø20 mm |
| Stroke | 350 mm |
| Adjustable window | 310 – 350 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 MBLJ20X350-40-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 MBLJ20X350-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×350 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 310–350 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 MALJ20X350-40-S Is Used
Textile Loom Tension Arm
Adjusting the end position without external stops lets operators fine-tune the reach of a fabric tensioning arm on a weaving loom, using the 132 N pull force to maintain consistent material take-up.
Thin-Film Web Guide
The 350 mm stroke provides the long sweep needed to shift a web-guide roller, while the 40 mm rear trim compensates for roller wear, ensuring the 8 mm rod holds alignment without adding new hardware.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-S with MBLJ20X350-40-S
To replace this MALJ20X350-40-S, specify the direct replacement MBLJ20X350-40-S. Confirm the 20 mm bore, 350 mm stroke, 40 mm adjust code, G1/8 PT port, M8x1.25 rod thread, and FA/LB mounting (no back cover or SDB). The -S magnet requires switching from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors. Remember the adjuster is a stop, not a lock.
Because the 350 mm stroke exceeds the 300 mm standard maximum, it is non-standard; at this length, minimize side-load to prevent rod bending, as long strokes amplify any misalignment.
Upgrade checklist
- ✓ Order the MBLJ20X350-40-S (same bore/stroke/adjust)
- ✓ Same 310–350 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 MBLJ20X350-40-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-40-S FAQ
Yes, the MALJ20X350-40-S is discontinued. The direct replacement is the MBLJ20X350-40-S, matching the 20 mm bore, 350 mm stroke, 40 mm adjust code, G1/8 port, and FA/LB mounting. You must upgrade your sensors: the old -S magnet used CS1-M / DS1-M switches, while the MBLJ uses CMSG / DMSG / EMSG switches. The MBLJ also features a riveted rolling-packed body instead of threaded covers.
The 40 mm adjust code lets you trim the rear travel by up to 40 mm, creating a usable stroke window from 310 mm to 350 mm. The adjuster is a travel stop that sets the end position; it does not hold the load without live air, and the fixed rubber bumper only softens the end impact.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X350-40-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
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