This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X125-40, 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 MALJ20 Adjustable Mini Cylinder MALJ20X125-40
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 40 mm, giving a usable end-position window from 85 to 125 mm. This model is discontinued — the direct replacement is the MBLJ20X125-40.
- BoreØ20 mm
- Stroke125 mm
- Adjust window85–125 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X125-40
- 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 MALJ20 Adjustable Mini Cylinder MALJ20X125-40
The AirTAC MALJ20X125-40 is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and a 125mm stroke. It is discontinued; the direct replacement is the MBLJ20X125-40. This legacy MALJ unit uses a rear screw stopper to trim up to 40mm, yielding a usable stroke window of 85-125mm.
The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. This SKU lacks a magnet (-S), so it cannot take a position sensor. Upgrading to the MBLJ20X125-40 changes the switch family from CS1-M/DS1-M to CMSG/DMSG/EMSG and replaces the threaded covers with a riveted rolling-packed body. End impact is absorbed by a fixed rubber bumper, as there is no adjustable air cushion. Mounting is FA or LB only; there is no back cover or SDB option.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X125-40 |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Adjustable window | 85 – 125 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 MBLJ20X125-40 carries the same ratings.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 132 N | 132 N |
| 0.7 MPa | 185 N | — |
| Max (@1.0 MPa) | 27 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 MBLJ20X125-40 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 85–125 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 MALJ20 Adjustable Mini Cylinder MALJ20X125-40 Is Used
PCB Router Depth Stop
Dial the rear adjuster to set a precise 100mm reach on a PCB depaneling router, preventing the M8 rod from crashing into the fixture while pushing with 157N at 0.5MPa.
Wire Termination Clamp
Trim the stroke to 85mm for crimping wire terminals, using the fixed rubber bumper to soften the end impact without relying on the stopper to hold the 132N pull load without air.
Dispenser Valve Actuation
Mount via FA brackets to drive a fluid dispenser valve, using the G1/8 port for fast cycling and the 40mm adjustment window to fine-tune the exact dispense depth.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 with MBLJ20X125-40
To replace the discontinued MALJ20X125-40, order the MBLJ20X125-40. Confirm the 20mm bore, 125mm stroke, 40mm adjust code, G1/8 port, PT threads, and FA/LB mounting. The MBLJ keeps the same force and dimensions but uses a riveted body. The adjuster is a stop, not a lock. For this 125mm stroke, prevent rod bending by ensuring rigid guiding and minimizing side loads.
Upgrade checklist
- ✓ Order the MBLJ20X125-40 (same bore/stroke/adjust)
- ✓ Same 85–125 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 MBLJ20X125-40 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 FAQ
Yes, the MALJ20X125-40 is discontinued. The direct replacement is the MBLJ20X125-40, which matches the 20mm bore, 125mm stroke, 40mm adjust code, G1/8 port, and force. The MBLJ upgrades the body to a riveted rolling-packed design and uses CMSG/DMSG/EMSG sensors instead of the older threaded covers. This specific MALJ SKU lacks a magnet, so it cannot take a sensor anyway.
The -40 adjust code means you can trim up to 40mm at the rear, giving a usable stroke window of 85-125mm. 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.
Direct Upgrade
The MBLJ20X125-40 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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40 → MBLJ20X125-40)
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