This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X40-40, 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 MALJ20X40-40
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40 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 MBLJ20X40-40.
- BoreØ20 mm
- Stroke40 mm
- Adjust window0–40 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X40-40
- 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 MALJ20X40-40
The AirTAC MALJ20X40-40 is a discontinued 20mm bore, double-acting mini cylinder with a 40mm rear adjustable stroke stopper. Because the adjust code matches the stroke, you can dial the usable end position anywhere in a 0-40mm window.
The direct replacement is the MBLJ20X40-40. It keeps the same bore, stroke, adjust code, force, and mounting, but upgrades the old threaded covers to a riveted rolling-packed body. Note this SKU lacks the -S magnet, so it cannot take a position sensor. The rear adjuster is a travel stop, not a lock; it sets the end position but holds no load without live air.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X40-40 |
| 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 MBLJ20X40-40 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 MBLJ20X40-40 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40
| 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 MALJ20X40-40 Is Used
Label Dispenser Peel Plate
Adjust the rear stopper to tune the peel angle on a bottle labeling head, allowing precise 0-40mm reach changes without swapping out the entire cylinder body.
Connector Pin Insertion
Set a specific end position to press M8 connector pins into housings, relying on the fixed rubber bumper to soften the end impact without crushing the delicate pins.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40 with MBLJ20X40-40
To replace the MALJ20X40-40, order the direct replacement MBLJ20X40-40. Confirm the 20mm bore, 40mm stroke, 40mm adjust code, G1/8 PT port, and M8x1.25 rod thread. Mounting is Basic, FA, or LB only; there is no back-cover or SDB option. If you need a sensor, the MBLJ upgrade uses CMSG/DMSG/EMSG switches. The adjuster sets end position but does not hold a load without air; add an external lock for held loads.
Upgrade checklist
- ✓ Order the MBLJ20X40-40 (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 MBLJ20X40-40 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X40-40 FAQ
Yes, the MALJ20X40-40 is discontinued. The direct replacement is the MBLJ20X40-40, which matches the 20mm bore, 40mm stroke, 40mm adjust code, G1/8 port, and force. It upgrades the threaded covers to a riveted rolling-packed body.
The 40mm adjust code lets you trim the end position within a 0-40mm usable window. The adjuster is a travel stop, not a lock, and this no-S SKU cannot take a position sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X40-40 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 MALJ20X40-40 → MBLJ20X40-40)
Tell us the quantity and destination — we quote the direct MBLJ20X40-40 replacement with price, stock and lead time, usually within 7-8 hours.