This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X275-20-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 MALJ20X275-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 255 to 275 mm. This model is discontinued — the direct replacement is the MBLJ20X275-20-S.
- BoreØ20 mm
- Stroke275 mm
- Adjust window255–275 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X275-20-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 MALJ20X275-20-S
The AirTAC MALJ20X275-20-S is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and a 275mm stroke. A rear adjuster lets you trim up to 20mm, giving a usable end-position window of 255-275mm. The direct replacement is the MBLJ20X275-20-S, matching the bore, stroke, and mounting.
This cylinder has a fixed rubber bumper, meaning the adjustable stroke sets the travel stop but does not provide an air cushion. The adjuster is a travel stop, not a lock; it will not hold a load without live air pressure. The original MALJ uses threaded covers and a CS1-M/DS1-M magnet switch. The MBLJ upgrade features a riveted rolling-packed body and uses CMSG/DMSG/EMSG sensors. On long 275mm strokes, side-load and rod-bending risks increase, so rigid guidance is essential.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X275-20-S |
| Bore size | Ø20 mm |
| Stroke | 275 mm |
| Adjustable window | 255 – 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 MBLJ20X275-20-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 MBLJ20X275-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-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. |
| -20 | Adjustable amount: trim the end to a 255–275 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 MALJ20X275-20-S Is Used
PCB Edge Routing
Dials in a 255-275mm reach for a depaneling router.
Label Applicator
Adjusts the stroke window to press a label onto varying carton sizes. The 20mm rear trim allows rapid depth changes for different packaging heights without swapping hardware.
Wire Taping Jig
Sets a precise end position for taping wire harnesses. The fixed rubber bumper softens the impact at the end of the 275mm stroke, protecting the 8mm rod from shock loads.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-S with MBLJ20X275-20-S
To replace the MALJ20X275-20-S, order the exact direct replacement MBLJ20X275-20-S. Confirm the 20mm bore, 275mm stroke, 20mm adjust code, G1/8 port, PT thread, and Basic/FA/LB mounting (no back cover or SDB). The -S magnet means your old CS1-M/DS1-M switches must change to CMSG/DMSG/EMSG on the MBLJ. Remember the rear adjuster is a travel stop, not a lock, and cannot hold a load without air.
Given the 275mm stroke, ensure your mounting handles rod-bending and side-load forces. If you need a held position without air, add an external pneumatic lock.
Upgrade checklist
- ✓ Order the MBLJ20X275-20-S (same bore/stroke/adjust)
- ✓ Same 255–275 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 MBLJ20X275-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X275-20-S FAQ
Yes, the MALJ20X275-20-S is discontinued. The direct replacement is the MBLJ20X275-20-S, which matches the 20mm bore, 275mm stroke, 20mm adjust code, and G1/8 port. You must upgrade your sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG, and the body changes from threaded covers to a riveted rolling-packed design.
The -20 adjust code lets you trim the rear position by up to 20mm, creating a usable stroke window of 255-275mm. At 0.7MPa, push is 220N, and the maximum force is 32kgf at 1.0MPa. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X275-20-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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