This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X15-20-S, 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 MALJ40X15-20-S
The AirTAC MALJ40 Adjustable Mini Cylinder MALJ40X15-20-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 -5 to 15 mm. This model is discontinued — the direct replacement is the MBLJ40X15-20-S.
- BoreØ40 mm
- Stroke15 mm
- Adjust window-5–15 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X15-20-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 MALJ40X15-20-S
The AirTAC MALJ40X15-20-S is a discontinued double-acting double-rod cylinder. The -20 adjust code lets you trim the rear position by up to 20mm, creating a usable stroke window of 0-15mm for exact depth tuning.
This -S variant uses a CS1-M or DS1-M magnet sensor, whereas the MBLJ upgrade takes CMSG/DMSG/EMSG switches. The original MALJ features threaded covers and a fixed rubber bumper; the replacement uses a riveted rolling-packed body. Remember the rear adjuster is a travel stop, not a lock, and cannot hold a load without live air.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X15-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X15-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X15-20-S |
| Bore size | Ø40 mm |
| Stroke | 15 mm |
| Adjustable window | -5 – 15 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 MBLJ40X15-20-S carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
MALJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod MAL push of the same bore. The MBLJ40X15-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X15-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×15 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a -5–15 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 MALJ40X15-20-S Is Used
PCB Router Depth Stop
Dial in a 5mm cutter plunge on an SMT line using the 0-15mm window.
Sheet Metal Forming Pre-Stop
Set a precise 10mm reach to pre-bend light gauge enclosures before the main press.
Plastic Trimming Jig
Trim varying injection molded flash depths on a single fixture by turning the rear screw. The 0-15mm adjustable travel lets operators swap part families quickly without changing cylinder hardware.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X15-20-S with MBLJ40X15-20-S
To replace this MALJ40X15-20-S with the MBLJ40X15-20-S, confirm the 40mm bore, 15mm stroke, -20 adjust code, PT G1/4 port, and M12x1.25 rod thread. Mounting is Basic, FA, or LB only, as there is no back-cover or SDB option. You must also update your sensors: the MALJ -S uses CS1-M/DS1-M switches, while the MBLJ uses CMSG/DMSG/EMSG. The adjuster sets the end position but does not lock the load.
This 40mm bore provides maximum thrust, delivering 880N at 0.7 MPa and 128kgf at 1.0 MPa.
Upgrade checklist
- ✓ Order the MBLJ40X15-20-S (same bore/stroke/adjust)
- ✓ Same -5–15 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 MBLJ40X15-20-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X15-20-S FAQ
Yes, the MALJ40X15-20-S is discontinued. The direct replacement is the MBLJ40X15-20-S, which matches the 40mm bore, 15mm stroke, 20mm adjust code, and G1/4 port. The MBLJ upgrades the body to a riveted rolling-packed design and changes the magnet switches from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The -20 adjust code allows you to trim up to 20mm at the rear, creating a usable stroke window of 0-15mm.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X15-20-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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