This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X50-20, 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 MALJ40 Adjustable Mini Cylinder MALJ40X50-20
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20 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 30 to 50 mm. This model is discontinued — the direct replacement is the MBLJ40X50-20.
- BoreØ40 mm
- Stroke50 mm
- Adjust window30–50 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X50-20
- 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 MALJ40 Adjustable Mini Cylinder MALJ40X50-20
The AirTAC MALJ40X50-20 is a discontinued double-acting double-rod mini cylinder with a rear adjustable stroke stopper. It has a 40mm bore, 50mm stroke, and a 20mm adjuster, creating a usable end-position window of 30-50mm. The direct replacement is the MBLJ40X50-20, which matches the bore, stroke, force, G1/4 port, and mounting.
This SKU lacks a magnet (-S) and cannot accept a position sensor. The upgrade path moves from threaded covers to a riveted rolling-packed body. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. End impact is softened by a fixed rubber bumper, as there is no adjustable air cushion.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X50-20 |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Adjustable window | 30 – 50 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 MBLJ40X50-20 carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 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 MBLJ40X50-20 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×50 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 30–50 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 MALJ40 Adjustable Mini Cylinder MALJ40X50-20 Is Used
Pneumatic Tube Insertion Jig
Adjust the end position to control the insertion depth of fittings into a hose assembly, using the fixed rubber bumper to soften the 628N impact at the end of travel.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20 with MBLJ40X50-20
To replace the MALJ40X50-20 with the MBLJ40X50-20, confirm the 40mm bore, 50mm stroke, 20mm adjust code, and G1/4 port. Mounting is Basic, FA, or LB only, with no back cover or SDB. Because this SKU has no magnet, you lose the legacy CS1-M/DS1-M switches entirely; the MBLJ upgrade uses CMSG/DMSG/EMSG sensors if you add an -S version later. Remember the adjuster is a stop, not a lock, for held loads.
Since the stroke is under 300mm, rod-bending side loads are minimal.
Upgrade checklist
- ✓ Order the MBLJ40X50-20 (same bore/stroke/adjust)
- ✓ Same 30–50 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 MBLJ40X50-20 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20 FAQ
Yes, the MALJ40X50-20 is discontinued. The direct replacement is the MBLJ40X50-20, which matches the 40mm bore, 50mm stroke, 20mm adjust code, and G1/4 port. The upgrade shifts from threaded covers to a riveted rolling-packed body.
The 20mm adjuster trims the 50mm stroke, giving a usable window of 30-50mm. This SKU has no magnet, so it cannot take a position sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X50-20 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 MALJ40 Adjustable Mini Cylinder MALJ40X50-20 → MBLJ40X50-20)
Tell us the quantity and destination — we quote the direct MBLJ40X50-20 replacement with price, stock and lead time, usually within 7-8 hours.