This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the drop-in replacement MBLJ40X500-20, 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 MALJ40X500-20
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20 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 480 to 500 mm. This model is discontinued — the drop-in replacement is the MBLJ40X500-20.
- BoreØ40 mm
- Stroke500 mm
- Adjust window480–500 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X500-20
- 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 MALJ40X500-20
The AirTAC MALJ40X500-20 is a discontinued double-acting single-rod cylinder with a rear adjustable stop. It trims up to 20 mm at the rear, yielding a usable 480-500 mm window. The 40 mm bore delivers 628 N push and 528 N pull at 0.5 MPa. The exact drop-in replacement is the MBLJ40X500-20.
This SKU lacks a magnet and cannot take a position sensor. The adjuster sets the end position but does not hold load without live air. The fixed rubber bumper softens impact. Upgrading to the MBLJ40X500-20 moves you from threaded covers to a riveted rolling-packed body.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20 Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X500-20 |
| Bore size | Ø40 mm |
| Stroke | 500 mm |
| Adjustable window | 480 – 500 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 MBLJ40X500-20 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 MBLJ40X500-20 matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×500 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 480–500 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 MALJ40X500-20 Is Used
Long-throw carton pusher
Dial in the 480-500 mm end position on packaging conveyor transitions to transfer cartons precisely without adding external mechanical stops.
CNC door actuation
Fine-tune the full 500 mm reach for machine tool safety doors, using the 628 N push force to slide heavy vertical guards reliably.
Palletizer depth stop
Set exact retraction depth on a 500 mm palletizing stroke, using the rear adjuster to compensate for fixture wear without rewriting PLC logic.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20 with MBLJ40X500-20
Replace the MALJ40X500-20 with the exact drop-in MBLJ40X500-20. Confirm the 40 mm bore, 500 mm stroke, 20 mm adjust code, G1/4 port, and PT thread. Mounting is FA or LB only; there is no back-cover or SDB option. Because this SKU lacks an -S magnet, it cannot take a sensor. If you need a sensor, the MBLJ upgrade uses CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M.
To size either way: step down to the 32 mm bore (402 N push at 0.5 MPa) or step up to this 40 mm bore (628 N push at 0.5 MPa) if you need more force. At 500 mm stroke, prevent rod bending by ensuring rigid guide rails to handle side loads.
Upgrade checklist
- ✓ Order the MBLJ40X500-20 (same bore/stroke/adjust)
- ✓ Same 480–500 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 MBLJ40X500-20 instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20 FAQ
Yes, the MALJ40X500-20 is discontinued. The exact drop-in replacement is the MBLJ40X500-20. It matches the 40 mm bore, 500 mm stroke, 20 mm adjust code, G1/4 port, and mounting. The MBLJ upgrades the body from threaded covers to a riveted rolling-packed design.
The 20 mm adjuster creates a usable stroke window of 480-500 mm. The full force set: push 628 N and pull 528 N at 0.5 MPa, push 880 N at 0.7 MPa, and max 128 kgf at 1.0 MPa. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X500-20 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
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