This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the drop-in replacement MBLJ40X300-30S, 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 MALJ40X300-30-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S 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 270 to 300 mm. This model is discontinued — the drop-in replacement is the MBLJ40X300-30-S.
- BoreØ40 mm
- Stroke300 mm
- Adjust window270–300 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X300-30-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 MALJ40X300-30-S
The AirTAC MALJ40X300-30-S is a discontinued double-acting, single-rod adjustable-stroke cylinder. It uses a rear stopper screw to trim the end position by up to 30 mm, giving a usable stroke window of 270-300 mm. Bore 40 mm yields 628 N push and 528 N pull force at 0.5 MPa. The exact drop-in replacement is the MBLJ40X300-30-S, matching the bore, stroke, adjust code, G1/4 port, and mounting.
This -S SKU has a magnet for CS1-M/DS1-M switches; the MBLJ upgrade switches to CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers, whereas the MBLJ features a riveted rolling-packed body. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. Impact is softened only by a fixed rubber bumper, as there is no adjustable air cushion.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X300-30-S |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Adjustable window | 270 – 300 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 MBLJ40X300-30-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 MBLJ40X300-30-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×300 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 270–300 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 MALJ40X300-30-S Is Used
PCB Router Z-Axis Depth Stop
Dial the 270-300 mm window on this 628 N cylinder to set the exact Z-axis plunge depth for a PCB depaneling router, preventing the spindle from crashing into the tooling base.
Sheet Metal Press Dwell
Trim the rear stroke by up to 30 mm to control the dwell position of a 40 mm bore press holding a sheet metal bracket, ensuring consistent bending without external hard stops.
Carton Sealer Flap Fold
Adjust the end position on a packaging line to fine-tune the folding arm reach on varying carton widths, using the 880 N push at 0.7 MPa to cleanly tuck heavy flaps.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S with MBLJ40X300-30-S
To replace the MALJ40X300-30-S, order the drop-in MBLJ40X300-30-S. Confirm the 40 mm bore, 300 mm stroke, 30 mm adjust code, G1/4 port, PT thread, and FA/LB mounting (there is no back cover or SDB option). The -S magnet means you must upgrade your switches from the old CS1-M/DS1-M to the MBLJ's CMSG/DMSG/EMSG family. Remember the adjuster is a stop, not a lock, so add an external lock for held loads.
Size both ways: stepping down to a 32 mm bore gives 402 N push at 0.5 MPa, while stepping up to the largest 40 mm bore (this size) provides 628 N push. With a 300 mm stroke, you must manage rod side-load; use precise guide rails to prevent rod bending and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ40X300-30-S (same bore/stroke/adjust)
- ✓ Same 270–300 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 MBLJ40X300-30-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X300-30-S FAQ
Yes, the MALJ40X300-30-S is discontinued. The exact drop-in replacement is the MBLJ40X300-30-S, which matches the 40 mm bore, 300 mm stroke, 30 mm adjust code, and G1/4 port. You will need to upgrade your sensors from the old CS1-M/DS1-M switches to the CMSG/DMSG/EMSG family, and the body changes from threaded covers to a riveted rolling-packed design.
The 30 mm adjust code lets you trim the rear position, creating a usable stroke window of 270-300 mm. The 40 mm bore provides 628 N push and 528 N pull at 0.5 MPa, 880 N push at 0.7 MPa, and a maximum of 128 kgf at 1.0 MPa. The adjuster is a travel stop, not a lock, and impact is absorbed by a fixed rubber bumper.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The MBLJ40X300-30-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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