This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X275-30-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 MALJ20X275-30-S
The AirTAC MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 30 mm, giving a usable end-position window from 245 to 275 mm. This model is discontinued — the direct replacement is the MBLJ20X275-30-S.
- BoreØ20 mm
- Stroke275 mm
- Adjust window245–275 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X275-30-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 MALJ20X275-30-S
The AirTAC MALJ20X275-30-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stroke stopper. The 30 mm adjust code creates a usable end-position window of 245-275 mm, letting you dial in the exact reach without external spacers.
The direct replacement is the MBLJ20X275-30-S, matching the bore, stroke, G1/8 port, and FA/LB mounting. The upgrade shifts from threaded covers to a riveted rolling-packed body, and the -S magnet transitions from the older CS1-M / DS1-M switches to the modern CMSG / DMSG / EMSG family. The rear adjuster acts purely as a travel stop, not a lock, and the fixed rubber bumper softens end impact without holding the load pneumatically.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X275-30-S |
| Bore size | Ø20 mm |
| Stroke | 275 mm |
| Adjustable window | 245 – 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 MBLJ20X275-30-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 MBLJ20X275-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×275 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 245–275 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 MALJ20X275-30-S Is Used
Textile Loom Tensioner
Fine-tune the yarn guide arm end position without machining spacers, letting the fixed rubber bumper absorb the high-frequency impact.
Light-Part Ejector
Adjust the 30 mm rear stop to eject small plastic caps from a mold at varying depths, preventing the rod from over-traveling and crashing the tooling.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S with MBLJ20X275-30-S
To replace the MALJ20X275-30-S, order the exact direct replacement MBLJ20X275-30-S. Confirm the 20 mm bore, 275 mm stroke, 30 mm adjust code, G1/8 port, PT thread, and FA/LB mounting (there is no back cover or SDB option). The -S magnet requires upgrading your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG. Remember the rear adjuster is a travel stop, not a lock.
At a 275 mm stroke, the rod is highly susceptible to side-load and bending; ensure your guide rails carry the load to prevent rod damage.
Upgrade checklist
- ✓ Order the MBLJ20X275-30-S (same bore/stroke/adjust)
- ✓ Same 245–275 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 MBLJ20X275-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-30-S FAQ
Yes, the MALJ20X275-30-S is discontinued. The direct replacement is the MBLJ20X275-30-S, matching the 20 mm bore, 275 mm stroke, 30 mm adjust code, G1/8 port, and FA/LB mounting. You must update your sensors: the old MALJ -S magnet used CS1-M / DS1-M switches, while the MBLJ uses CMSG / DMSG / EMSG switches.
The 30 mm adjust code lets you trim the rear end position, creating a usable stroke window of 245-275 mm. The adjuster is a travel stop, not a lock; it will not hold a load without live air pressure.
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Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X275-30-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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