This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the drop-in replacement MBLJ40X500-20S, 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-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-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 480 to 500 mm. This model is discontinued — the drop-in replacement is the MBLJ40X500-20-S.
- BoreØ40 mm
- Stroke500 mm
- Adjust window480–500 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X500-20-S
- 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-S
The AirTAC MALJ40X500-20-S is a discontinued 40mm bore, double-acting mini cylinder with a rear adjustable stroke stopper. It trims up to 20mm off the 500mm stroke, yielding a usable end-position window of 480-500mm. It delivers 628N push and 528N pull force at 0.5MPa. The exact drop-in replacement is the MBLJ40X500-20-S, matching the bore, stroke, G1/4 port, and mounting.
This SKU features a -S magnet for position sensing. The legacy MALJ works with CS1-M/DS1-M switches, while the MBLJ upgrades to CMSG/DMSG/EMSG sensors. The original threaded covers are replaced by a riveted rolling-packed body on the MBLJ. A fixed rubber bumper absorbs end-of-stroke impact; the rear adjuster is strictly a travel stop, not a mechanical lock, and cannot hold a load without live air pressure.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X500-20-S |
| 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-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 MBLJ40X500-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-S
| 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-S Is Used
Long-Reach Pallet Platen Stop
Dial in the 480-500mm end position to align a pallet platen stop without machining new hard stops, using the 628N push force to square heavy loads.
Carton Flap Folder
Trim the 20mm rear stroke to perfectly time a 500mm flap-folding blade on a packaging line, preventing over-travel tears on varying box heights.
Textile Beam Lifter
Fine-tune the lift height of a textile beam in a loom beam changer, using the fixed rubber bumper to soften the impact of the heavy 880N @0.7MPa extension.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-S with MBLJ40X500-20-S
To replace the MALJ40X500-20-S, order the drop-in MBLJ40X500-20-S. Confirm the 40mm bore, 500mm stroke, 20mm adjust code, G1/4 port, PT thread, and FA/LB mounting (no back cover or SDB). If migrating the -S magnet, swap the old CS1-M/DS1-M switches for CMSG/DMSG/EMSG sensors. Remember the adjuster only sets the 480-500mm end position; it will not hold a load without air.
When sizing, you can step down to the 32mm bore (402N push at 0.5MPa) for lighter loads, or step up to a larger ISO 15552 cylinder if your frame allows. At 500mm stroke on a 16mm rod, beware of rod-bending under side loads—use a guide rail to prevent premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ40X500-20-S (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-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X500-20-S FAQ
Yes, the MALJ40X500-20-S is discontinued. The exact drop-in replacement is the MBLJ40X500-20-S, which matches the 40mm bore, 500mm stroke, 20mm adjust code, G1/4 port, and FA/LB mounting. You must upgrade your sensors: the old CS1-M/DS1-M switches are replaced by CMSG/DMSG/EMSG models.
The usable stroke window is 480-500mm (500mm base stroke minus the 20mm rear adjuster travel). The 40mm bore 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 lock, and cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X500-20-S 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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