This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is MBLJ40X50-20-S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the MBLJ40X50-20-S in place of this model. 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-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-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 30 to 50 mm. This model is discontinued — the drop-in replacement is the MBLJ40X50-20-S.
- BoreØ40 mm
- Stroke50 mm
- Adjust window30–50 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X50-20-S
About the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S
The AirTAC MALJ40X50-20-S is a discontinued 40mm bore, double-acting single-rod mini cylinder with a 20mm rear adjustable stroke stopper. It provides a usable end-position window of 30-50mm. The rear adjuster sets travel but is a stop, not a lock; it cannot hold a load without live air pressure. The fixed rubber bumper softens end impact, meaning there is no adjustable air cushion.
The direct drop-in replacement is the MBLJ40X50-20-S, matching the 628N push and 528N pull forces at 0.5MPa, G1/4 port, and M12x1.25 rod thread. This MALJ unit features threaded covers and uses CS1-M/DS1-M sensors for its -S magnet, whereas the MBLJ upgrade uses a riveted rolling-packed body and CMSG/DMSG/EMSG switches. It accepts FA/LB mounting only, with no back cover or SDB option.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X50-20-S |
| 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-S carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Single-rod force, same as a standard MAL of this bore. The MBLJ40X50-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S
| 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-S Is Used
PCB Router Spindle Depth
Dial the 30-50mm stroke window to set exact Z-axis plunging depth for a PCB depaneling router, utilizing the 628N push force to cleanly cut FR4 without stressing the board.
Pneumatic Press Tonnage Check
Apply up to 880N at 0.7MPa for seating bearings in a small pneumatic press, using the rear stopper to prevent over-travel and bottoming out the assembly.
Packaging Fold Tolerance
Fine-tune the carton folding flap position in a packaging line; the 20mm adjuster lets you alter the end point without adding external spacers or changing the G1/4 air lines.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S with MBLJ40X50-20-S
To replace the MALJ40X50-20-S with the MBLJ40X50-20-S, confirm the 40mm bore, 50mm stroke, 20mm adjust code, G1/4 port, PT threads, and FA/LB mounting. The -S magnet means you must upgrade your sensors from the older CS1-M/DS1-M to the CMSG/DMSG/EMSG family. Remember the rear adjuster is a travel stop, not a lock, so add an external lock for held loads.
For sizing, step down to the 32mm bore (402N push @0.5MPa) if you need less force, or step up to the 40mm bore's maximum standard configuration if you need longer reach. At 50mm stroke, rod bending is minimal, but always guide the load to prevent side-load damage to the 16mm hard-chrome rod.
Upgrade checklist
- ✓ Order the MBLJ40X50-20-S (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-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S FAQ
Yes, the MALJ40X50-20-S is discontinued. The exact drop-in replacement is the MBLJ40X50-20-S, which matches the 40mm bore, 50mm stroke, 20mm adjust code, G1/4 port, and FA/LB mounting. You will need to upgrade your sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The usable stroke window is 30-50mm. The double-acting single rod delivers 628N push and 528N pull at 0.5MPa, 880N push at 0.7MPa, and a maximum of 128kgf at 1.0MPa. The rear adjuster is a travel stop, not a load lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X50-20-S replaces this model 1:1.
Fast Dispatch
MBLJ replacements usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Recommended AirTAC MBLJ Replacements
Request a Quote (Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-S → MBLJ40X50-20-S)
Tell us the quantity and destination — we quote the drop-in MBLJ40X50-20-S replacement with price, stock and lead time, usually within 7-8 hours.