This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X250-40, 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 MALJ20X250-40
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40 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 210 to 250 mm. This model is discontinued — the direct replacement is the MBLJ20X250-40.
- BoreØ20 mm
- Stroke250 mm
- Adjust window210–250 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X250-40
- 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 MALJ20X250-40
The AirTAC MALJ20X250-40 is a discontinued double-acting double-rod cylinder with a 20mm bore and 250mm stroke. A rear screw lets you trim up to 40mm of travel, creating a usable 210-250mm end-position window. The direct replacement is the MBLJ20X250-40.
This SKU lacks a magnet (-S), so it cannot take a position sensor. The adjuster is a travel stop, not a lock; it sets reach but will not hold load without live air. Upgrading to the MBLJ brings a riveted rolling-packed body instead of threaded covers, and uses CMSG/DMSG/EMSG sensors if needed. Impact is absorbed by a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X250-40 |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Adjustable window | 210 – 250 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 MBLJ20X250-40 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 MBLJ20X250-40 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×250 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 210–250 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 MALJ20X250-40 Is Used
Carton Flap Tucking
Fine-tune the retract position on a packaging line carton erector without adding external spacers, ensuring the 8mm rod clears varying box heights.
Label Applicator Pin
Adjust the stroke end-point to precisely poke a label out for a wipe-down brush, accommodating different label widths without swapping hardware.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40 with MBLJ20X250-40
To replace this MALJ20X250-40, order the MBLJ20X250-40. Confirm the 20mm bore, 250mm stroke, 40mm adjust code, G1/8 port, PT thread, and Basic/FA/LB mounting (no back cover or SDB). Since this SKU lacks a magnet, it cannot accept a sensor; the MBLJ upgrade moves to CMSG/DMSG/EMSG switches if you add an -S model.
At 250mm stroke on an 8mm rod, minimize side-loading to prevent rod bending. The adjuster is a stop, not a lock; use an external lock for held loads.
Upgrade checklist
- ✓ Order the MBLJ20X250-40 (same bore/stroke/adjust)
- ✓ Same 210–250 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 MBLJ20X250-40 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X250-40 FAQ
Yes, the MALJ20X250-40 is discontinued. The direct replacement is the MBLJ20X250-40, matching the 20mm bore, 250mm stroke, 40mm adjust code, G1/8 port, and mounting. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The usable adjustable window is 210-250mm (250mm stroke minus the 40mm adjust code). The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X250-40 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 MALJ20X250-40 → MBLJ20X250-40)
Tell us the quantity and destination — we quote the direct MBLJ20X250-40 replacement with price, stock and lead time, usually within 7-8 hours.