This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X50-30, 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 MALJ40X50-30
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30 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 20 to 50 mm. This model is discontinued — the direct replacement is the MBLJ40X50-30.
- BoreØ40 mm
- Stroke50 mm
- Adjust window20–50 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X50-30
- 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 MALJ40X50-30
The AirTAC MALJ40X50-30 is a discontinued double-acting double-rod mini cylinder with a 40mm bore and 50mm stroke. The -30 adjust code lets you trim the rear end position by up to 30mm, creating a usable stroke window of 20-50mm. The direct replacement is the MBLJ40X50-30, matching the bore, stroke, adjust code, and G1/4 port.
This SKU lacks a -S magnet, so it cannot accept a position sensor. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. The fixed rubber bumper softens end impact. During the upgrade, the threaded covers change to a riveted rolling-packed body, and the older CS1-M/DS1-M sensor family is replaced by CMSG/DMSG/EMSG on the MBLJ.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X50-30 |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Adjustable window | 20 – 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 MBLJ40X50-30 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 MBLJ40X50-30 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×50 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 20–50 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 MALJ40X50-30 Is Used
Automated Valve Seat Press
Fine-tune the insertion depth of a valve seat into an aluminum manifold head, relying on the 30mm rear adjustment to dial in the perfect seating position without new hardware.
Packaging Flap Tucker
Adjust the tucking arm reach on a carton sealing machine by trimming the stroke, using the fixed rubber bumper to absorb the 528N pull impact at the end of each cycle.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30 with MBLJ40X50-30
To replace this MALJ40X50-30, order the exact direct replacement MBLJ40X50-30. Confirm the 40mm bore, 50mm stroke, 30mm adjust code, PT G1/4 port, and M12x1.25 rod thread. Mounting is Basic, FA, or LB only; there is no back cover or SDB option. Because this SKU has no magnet, you lose sensor capability unless you switch to an MBLJ-S model using CMSG/DMSG/EMSG switches. The adjuster is a stop, not a lock; use an external lock for held loads.
If you need more force, you must move to a different cylinder family entirely. With a 50mm stroke, side-load risk is low, but ensure the rod-end thread aligns with your clevis to prevent rod bending.
Upgrade checklist
- ✓ Order the MBLJ40X50-30 (same bore/stroke/adjust)
- ✓ Same 20–50 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 MBLJ40X50-30 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-30 FAQ
Yes, the MALJ40X50-30 is discontinued. The direct replacement is the MBLJ40X50-30, which matches the 40mm bore, 50mm stroke, 30mm adjust code, and G1/4 port. The MBLJ upgrades the construction with a riveted rolling-packed body instead of threaded covers.
The -30 adjust code allows you to trim up to 30mm at the rear, creating a usable stroke window of 20-50mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X50-30 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 MALJ40X50-30 → MBLJ40X50-30)
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