This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X40-40S, 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 MALJ20X40-40S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40S 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 0 to 40 mm. This model is discontinued — the direct replacement is the MBLJ20X40-40S.
- BoreØ20 mm
- Stroke40 mm
- Adjust window0–40 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X40-40S
- 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 MALJ20X40-40S
The AirTAC MALJ20X40-40S is a discontinued double-acting double-rod mini cylinder with a 40mm rear adjustable stroke stopper. The -40 adjust code lets you trim the end position by up to 40mm, creating a usable 0-40mm stroke window. The direct replacement is the MBLJ20X40-40S, matching the 20mm bore, G1/8 port, and mounting.
This -S SKU has a magnet for position sensing, using the older CS1-M/DS1-M switches, whereas the MBLJ upgrade uses CMSG/DMSG/EMSG sensors. The MALJ features threaded covers, while the MBLJ replacement uses a riveted rolling-packed body. The rear 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 MALJ20X40-40S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X40-40S |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Adjustable window | 0 – 40 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 MBLJ20X40-40S 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 MBLJ20X40-40S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×40 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 0–40 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 MALJ20X40-40S Is Used
Dispenser Nozzle Height Trim
Fine-tune the retracted position of a syringe dispenser nozzle on a packaging line, adjusting the travel stop to accommodate different cartridge heights without adding external spacers.
Small Part Ejector Stroke
Trim the extension stroke to eject small plastic moulded parts from a fixture, ensuring the 8mm rod does not overtravel and hit the conveyor guide rail.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40S with MBLJ20X40-40S
To replace the MALJ20X40-40S, order the exact direct replacement MBLJ20X40-40S. Confirm the 20mm bore, 40mm stroke, 40mm adjust code, G1/8 PT port, M8x1.25 rod thread, and FA/LB mounting (there is no back cover or SDB option). Note the sensor family change: the MALJ -S magnet uses CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG. Remember the adjuster is a stop, not a lock, so add an external lock for held loads.
For sizing flexibility, you can step down or up from this 20mm bore. The next size down does not exist in this mini series, so 20mm is the smallest.
Upgrade checklist
- ✓ Order the MBLJ20X40-40S (same bore/stroke/adjust)
- ✓ Same 0–40 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 MBLJ20X40-40S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40S FAQ
Yes, the MALJ20X40-40S is discontinued. The direct replacement is the MBLJ20X40-40S, which matches the 20mm bore, 40mm stroke, 40mm adjust code, G1/8 port, and mounting. The MBLJ upgrades the body to a riveted rolling-packed design and changes the sensor family from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The usable stroke window is 0-40mm because the 40mm adjust code lets you trim the full 40mm stroke at the rear.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X40-40S 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 MALJ20X40-40S → MBLJ20X40-40S)
Tell us the quantity and destination — we quote the direct MBLJ20X40-40S replacement with price, stock and lead time, usually within 7-8 hours.