This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-40-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 MALJ20X400-40-S
The AirTAC MALJ20 Adjustable Mini Cylinder MALJ20X400-40-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 360 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-40-S.
- BoreØ20 mm
- Stroke400 mm
- Adjust window360–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-40-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 MALJ20X400-40-S
The AirTAC MALJ20X400-40-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stroke. It has a 20mm bore, a 400mm stroke, and a 40mm adjuster, giving a usable end-position window of 360-400mm. The direct replacement is the MBLJ20X400-40-S, which matches the bore, stroke, force, G1/8 port, and mounting.
This non-standard 400mm stroke exceeds the 300mm max standard for bore 20, meaning it was a made-to-order item. The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. The fixed rubber bumper softens end impacts but provides no adjustable cushioning. The original MALJ uses threaded covers and a CS1-M/DS1-M magnet, while the MBLJ upgrade features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-40-S |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 360 – 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 MBLJ20X400-40-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 MBLJ20X400-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-40-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. |
| -40 | Adjustable amount: trim the end to a 360–400 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 MALJ20X400-40-S Is Used
PCB Edge Routing
Deploys a 360-400mm reach into a routing station to cut printed circuit board panels, using the 40mm adjuster to dial the exact cut depth without moving the frame.
Textile Loom Threading
Pushes a thread guide carriage across a wide loom, trimming up to 40mm at the rear stopper to match varying fabric widths without adding external spacers.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-40-S with MBLJ20X400-40-S
To replace the MALJ20X400-40-S, order the direct replacement MBLJ20X400-40-S. Confirm the 20mm bore, 400mm stroke, 40mm adjust code, G1/8 port, PT threads, and FA/LB mounting (there is no back cover or SDB option). If migrating sensors, note the switch family changes from CS1-M/DS1-M to CMSG/DMSG/EMSG. The rear adjuster sets the end position but does not lock the load without air pressure.
Because this 400mm stroke is non-standard and exceeds the 300mm standard maximum, be mindful of rod-bending and side-load risks on long extensions; use guide rails to prevent cylinder damage.
Upgrade checklist
- ✓ Order the MBLJ20X400-40-S (same bore/stroke/adjust)
- ✓ Same 360–400 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 MBLJ20X400-40-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-40-S FAQ
Yes, the MALJ20X400-40-S is discontinued. You will need to update your sensor mounts, as the MBLJ uses CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M.
The usable adjustable window is 360-400mm (400mm stroke minus the 40mm adjuster). The rear screw is a travel stop, not a lock, so it will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-40-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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