This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X275-40S, 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 MALJ20X275-40S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S 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 235 to 275 mm. This model is discontinued — the direct replacement is the MBLJ20X275-40S.
- BoreØ20 mm
- Stroke275 mm
- Adjust window235–275 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X275-40S
- 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 MALJ20X275-40S
The AirTAC MALJ20X275-40S is a discontinued double-acting, double-rod mini cylinder with a 40 mm rear adjustable stroke stopper. It provides a usable end-position window of 235-275 mm.
The rear adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load without live air. This -S variant uses the older CS1-M / DS1-M magnet switches, whereas the MBLJ replacement upgrades to CMSG / DMSG / EMSG sensors. The MALJ features threaded covers and a fixed rubber bumper, while the MBLJ uses a riveted rolling-packed body.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X275-40S |
| Bore size | Ø20 mm |
| Stroke | 275 mm |
| Adjustable window | 235 – 275 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 MBLJ20X275-40S 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 MBLJ20X275-40S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×275 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 235–275 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 MALJ20X275-40S Is Used
PCB Depaneling Saw
Dialing the 235-275 mm window trims the blade cut depth on a depaneling router, compensating for blade wear without remounting the entire head.
Carton Flap Folder
Adjusts the stroke end-stop on a packaging flap folder to handle varying box heights, using the fixed rubber bumper to soften the end impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S with MBLJ20X275-40S
Replace the MALJ20X275-40S with the direct replacement MBLJ20X275-40S. Confirm the 20 mm bore, 275 mm stroke, 40 mm adjust code, G1/8 PT port, and M8x1.25 rod-end thread. Mounting is Basic, FA, or LB only; there is no back cover or SDB option. The -S magnet sensor family changes from CS1-M / DS1-M to CMSG / DMSG / EMSG. Remember the adjuster is a stop, not a lock.
At 275 mm stroke, the 8 mm rod is highly susceptible to side-load and rod-bending; ensure strict guidance to prevent premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X275-40S (same bore/stroke/adjust)
- ✓ Same 235–275 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 MBLJ20X275-40S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-40S FAQ
Yes, the MALJ20X275-40S is discontinued. The direct replacement is the MBLJ20X275-40S, which matches the 20 mm bore, 275 mm stroke, 40 mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design and changes the -S magnet switches from CS1-M / DS1-M to CMSG / DMSG / EMSG.
The 40 mm adjust code means you can trim up to 40 mm at the rear, creating a usable stroke window of 235-275 mm.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X275-40S 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 MALJ20X275-40S → MBLJ20X275-40S)
Tell us the quantity and destination — we quote the direct MBLJ20X275-40S replacement with price, stock and lead time, usually within 7-8 hours.