This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X350-20-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 MALJ20X350-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-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 330 to 350 mm. This model is discontinued — the direct replacement is the MBLJ20X350-20-S.
- BoreØ20 mm
- Stroke350 mm
- Adjust window330–350 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X350-20-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 MALJ20X350-20-S
The AirTAC MALJ20X350-20-S is a discontinued double-acting mini cylinder with a 20mm bore and a 350mm stroke. Because this is an adjustable-stroke variant, the rear screw stopper lets you trim up to 20mm, yielding a usable end-position window of 330-350mm. As a non-standard stroke exceeding the 300mm maximum, it was supplied as a made-to-order item.
The direct replacement is the MBLJ20X350-20-S, matching the bore, stroke, force, G1/8 port, and mounting. Upgrading is necessary because the MALJ uses threaded covers and a CS1-M/DS1-M magnet system, whereas the MBLJ features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors. The adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. End impact is softened by a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X350-20-S |
| Bore size | Ø20 mm |
| Stroke | 350 mm |
| Adjustable window | 330 – 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 MBLJ20X350-20-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 MBLJ20X350-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-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. |
| -20 | Adjustable amount: trim the end to a 330–350 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 MALJ20X350-20-S Is Used
PCB Router Z-Axis
Dialing the 330-350mm end window on a PCB depaneling router sets the exact cutting depth.
Long-Reach Lever Arm
Trimming 20mm off the 350mm stroke fine-tunes the resting angle of an extended packaging flap-folding arm. The fixed rubber bumper absorbs the lever's momentum at the end of the 350mm travel.
Thin-Film Squeegee Stop
Setting the rear stopper to 340mm prevents a long-stroke squeegee from bottoming out in a thin-film coating trough. The G1/8 port provides adequate flow for the 30-800mm/s speed range.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-S with MBLJ20X350-20-S
To replace the MALJ20X350-20-S, order the direct replacement MBLJ20X350-20-S. Confirm the 20mm bore, 350mm stroke, 20mm adjust code, G1/8 port, PT threads, and FA/LB mounting (no back cover or SDB). The -S magnet means a sensor family change from CS1-M/DS1-M to CMSG/DMSG/EMSG. Remember the adjuster is a stop, not a lock.
Because the 350mm stroke exceeds the 300mm standard and is non-standard, the long rod is highly susceptible to bending under side loads—ensure strict axial load alignment to prevent rod binding and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X350-20-S (same bore/stroke/adjust)
- ✓ Same 330–350 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 MBLJ20X350-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-20-S FAQ
Yes, the MALJ20X350-20-S is discontinued. The direct replacement is the MBLJ20X350-20-S, which matches the 20mm bore, 350mm stroke, 20mm adjust code, force, and G1/8 port. You will need to upgrade your sensors from the old CS1-M/DS1-M switches to the CMSG/DMSG/EMSG family.
The 20mm adjust code lets you trim the rear travel stopper, creating a usable stroke window from 330mm to 350mm. The adjuster is a travel stop, not a lock; it cannot hold a load without live air.
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Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X350-20-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.
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