This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X300-100S, 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 MALJ20X300-100-S
The AirTAC MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 100 mm, giving a usable end-position window from 200 to 300 mm. This model is discontinued — the direct replacement is the MBLJ20X300-100-S.
- BoreØ20 mm
- Stroke300 mm
- Adjust window200–300 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X300-100-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 MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S
The AirTAC MALJ20X300-100-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable stroke. It trims up to 100 mm at the rear, giving a usable end-position window of 200-300 mm. The direct replacement is the MBLJ20X300-100-S, matching the bore, stroke, adjust code, and G1/8 port.
This SKU includes the -S magnet for position sensing. The original MALJ uses older CS1-M or DS1-M reed switches, while the MBLJ20X300-100-S upgrade uses CMSG, DMSG, or EMSG sensors. The MALJ features threaded covers, whereas the MBLJ replacement uses a riveted rolling-packed body. Both share a fixed rubber bumper. The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X300-100-S |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Adjustable window | 200 – 300 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 MBLJ20X300-100-S 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 MBLJ20X300-100-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×300 | Nominal stroke length in mm. |
| -100 | Adjustable amount: trim the end to a 200–300 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 MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S Is Used
PCB Depaneling Router
Dial the end position within the 200-300 mm window to set the exact cutting depth of a router bit on an automated PCB depaneling machine, preventing blade overshoot.
Dispensing Needle Positioning
Fine-tune the 300 mm reach for a fluid dispensing needle on an epoxy coating line, adjusting the stroke by up to 100 mm without adding external mechanical stops.
Wire Straightener Feed
Set the pull-back distance on a wire straightener feed mechanism, using the 132 N pull force to release material tension accurately at varying lengths.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S with MBLJ20X300-100-S
To replace the MALJ20X300-100-S, order the exact direct replacement MBLJ20X300-100-S. Confirm the 20 mm bore, 300 mm stroke, 100 mm adjust code, G1/8 port, and -S magnet. The MBLJ keeps the FA/LB mounting options; no back-cover or SDB code is used. Remember that the adjuster sets the end position but does not hold the load without air. The -S magnet changes the sensor family from CS1-M/DS1-M to CMSG/DMSG/EMSG.
Because this 300 mm stroke is at the maximum limit for a 20 mm bore, use an external guide to prevent rod-bending and side-load issues on long extensions.
Upgrade checklist
- ✓ Order the MBLJ20X300-100-S (same bore/stroke/adjust)
- ✓ Same 200–300 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 MBLJ20X300-100-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-100-S FAQ
Yes, the MALJ20X300-100-S is discontinued. The direct replacement is the MBLJ20X300-100-S, which matches the 20 mm bore, 300 mm stroke, 100 mm adjust code, and G1/8 port. The MBLJ upgrade uses a riveted rolling-packed body instead of threaded covers, and its -S magnet requires CMSG, DMSG, or EMSG sensors instead of the older CS1-M/DS1-M switches.
The -100 adjust code means you can trim up to 100 mm at the rear, creating a usable stroke window from 200 mm to 300 mm. The rear adjuster is a travel stop, not a lock, and it will not hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X300-100-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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