This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is MBLJ40X50-20-FA — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the MBLJ40X50-20-FA 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-FA
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA 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-FA.
- BoreØ40 mm
- Stroke50 mm
- Adjust window30–50 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X50-20-FA
About the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA
The AirTAC MALJ40X50-20-FA is a discontinued double-acting single-rod cylinder with a 40mm bore and a 50mm stroke. It uses a rear screw stopper to trim up to 20mm of travel, giving a usable extension window of 30-50mm. This SKU includes an FA flange mount and a G1/4 port. It delivers 628N of push force at 0.5MPa. The exact drop-in replacement is the MBLJ40X50-20-FA, which matches the bore, stroke, adjust code, port, and mounting.
This unit lacks a magnet (-S), so it cannot accept position sensors like the older CS1-M or DS1-M switches. The original MALJ features threaded covers, whereas the current MBLJ upgrade uses a riveted rolling-packed body. End-of-travel impact is handled by a fixed rubber bumper, not an adjustable air cushion. Remember that the rear adjuster is a travel stop that sets the end position; it does not hold a load without live air pressure.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X50-20-FA |
| 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-FA 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-FA matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA
| 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-FA Is Used
Press-Fit Pin Insertion
Dials the exact 30-50mm reach for seating connector pins on PCB assemblies without retooling the head, using the 628N push force to overcome insertion resistance.
Adjustable Depth Stoppering
Sets a precise mechanical end position for carton flap folding machines, allowing operators to trim 20mm of stroke to accommodate varying package heights.
Variable Stroke Clamping
Secures aluminum extrusions in a welding jig by tuning the clamping window, relying on the fixed rubber bumper to absorb the 880N impact at 0.7MPa without damaging the profile.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA with MBLJ40X50-20-FA
To replace the MALJ40X50-20-FA, order the MBLJ40X50-20-FA. Confirm the 40mm bore, 50mm stroke, 20mm adjust code, G1/4 port, PT thread form, and FA flange mounting. Because this SKU has no -S magnet, it cannot support a sensor; if you need position detection, step up to an MBLJ40X50-20S-FA and use CMSG, DMSG, or EMSG switches. The adjuster sets the end stop but will not hold a load pneumatically without air.
When sizing, step down to a 32mm bore for 402N push at 0.5MPa, or step up to a larger ISO 15552 profile if your frame allows it. The 40mm bore provides 628N push and 528N pull at 0.5MPa. With a 50mm stroke, rod side-load is minimal, but always ensure the FA flange is aligned to prevent rod bending.
Upgrade checklist
- ✓ Order the MBLJ40X50-20-FA (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-FA instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X50-20-FA FAQ
Yes, the MALJ40X50-20-FA is discontinued. The exact drop-in replacement is the MBLJ40X50-20-FA, which matches the 40mm bore, 50mm stroke, 20mm adjust code, G1/4 port, and FA mount. The MBLJ uses a riveted rolling-packed body instead of threaded covers.
The 40mm bore provides a push force of 628N and a pull force of 528N at 0.5MPa, 880N push at 0.7MPa, and a maximum of 128kgf at 1.0MPa. The 20mm adjust code lets you trim the 50mm stroke, creating a usable extension window of 30-50mm. This adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X50-20-FA 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-FA → MBLJ40X50-20-FA)
Tell us the quantity and destination — we quote the drop-in MBLJ40X50-20-FA replacement with price, stock and lead time, usually within 7-8 hours.