This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-20-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 MALJ20X400-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-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 380 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-20-S.
- BoreØ20 mm
- Stroke400 mm
- Adjust window380–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-20-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 MALJ20X400-20-S
The AirTAC MALJ20X400-20-S is a discontinued adjustable-stroke mini cylinder. Its rear stopper trims up to 20 mm, giving a usable end-position window of 380-400 mm. As a non-standard 400 mm stroke on a 20 mm bore, it was made to order. The direct replacement is the MBLJ20X400-20-S.
This -S model uses a CS1-M / DS1-M magnet sensor, whereas the MBLJ upgrade uses CMSG / DMSG / EMSG switches. The original MALJ has threaded covers, while the MBLJ features a riveted rolling-packed body. The fixed rubber bumper softens end impact, but the adjuster is a travel stop, not a lock. It cannot hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-20-S |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 380 – 400 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 MBLJ20X400-20-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 MBLJ20X400-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×400 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 380–400 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 MALJ20X400-20-S Is Used
PCB Edge Pin Loader
Dials the exact 380-400 mm reach to push bare circuit boards into a test fixture without adding external stops.
Dispenser Head Aligner
Fine-tunes the extended end position on a 400 mm stroke to align a glue nozzle, compensating for machine frame variance.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S with MBLJ20X400-20-S
Replace the MALJ20X400-20-S directly with the MBLJ20X400-20-S, matching the 20 mm bore, 400 mm stroke, 20 mm adjust code, G1/8 port, and PT thread. Mounting is FA or LB only, as there is no back cover or SDB option. Confirm the sensor family change: the old CS1-M / DS1-M switches will not fit the new MBLJ, requiring CMSG / DMSG / EMSG sensors. The adjuster sets the end position but does not lock the load.
Note that a 400 mm stroke on an 8 mm rod invites rod bending under side loads; ensure rigid guide alignment to prevent premature seal wear and binding.
Upgrade checklist
- ✓ Order the MBLJ20X400-20-S (same bore/stroke/adjust)
- ✓ Same 380–400 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 MBLJ20X400-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S FAQ
Yes, the MALJ20X400-20-S is discontinued. The direct replacement is the MBLJ20X400-20-S, which matches the 20 mm bore, 400 mm stroke, 20 mm adjust code, and G1/8 port. You will need to update your sensors from the old CS1-M / DS1-M to the new CMSG / DMSG / EMSG family.
The usable adjustable window is 380-400 mm. The adjuster is a travel stop, not a lock, and the fixed rubber bumper softens end impact only.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-20-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.
Recommended AirTAC MBLJ Replacements
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-20-S → MBLJ20X400-20-S)
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