This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X300-50S, 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 MALJ20X300-50-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 50 mm, giving a usable end-position window from 250 to 300 mm. This model is discontinued — the direct replacement is the MBLJ20X300-50-S.
- BoreØ20 mm
- Stroke300 mm
- Adjust window250–300 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X300-50-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 MALJ20X300-50-S
The AirTAC MALJ20X300-50-S is a discontinued double-acting, double-rod mini cylinder with a 50 mm rear adjustable stroke stopper, yielding a usable reach window of 250-300 mm. The direct replacement is the MBLJ20X300-50-S, matching the bore, stroke, adjuster, and G1/8 port.
This -S magnet SKU originally used CS1-M / DS1-M switches, whereas the MBLJ replacement upgrades to CMSG / DMSG / EMSG sensors. The MALJ uses threaded covers, while 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. End impact is softened by a fixed rubber bumper, not an adjustable cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X300-50-S |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Adjustable window | 250 – 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 MBLJ20X300-50-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 MBLJ20X300-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-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. |
| -50 | Adjustable amount: trim the end to a 250–300 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 MALJ20X300-50-S Is Used
Dispensing Valve Depth Setter
Fine-tunes the nozzle height on a 300 mm travel slide, trimming up to 50 mm at the rear to prevent syringe crash without swapping the cylinder.
Wire Stripping Clamp Open
Sets a precise jaw opening window for varying wire gauges, using the 132 N pull force to retract the gripping fingers cleanly.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-S with MBLJ20X300-50-S
To replace the MALJ20X300-50-S, order the MBLJ20X300-50-S. Confirm the 20 mm bore, 300 mm stroke, 50 mm adjust code, G1/8 port, PT threads, and FA/LB mounting (there is no back cover or SDB option). The -S magnet means you must upgrade your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG. The adjuster is a travel stop, not a lock. At 300 mm stroke, the 8 mm rod is prone to bending under side loads—ensure pure axial mounting.
Upgrade checklist
- ✓ Order the MBLJ20X300-50-S (same bore/stroke/adjust)
- ✓ Same 250–300 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 MBLJ20X300-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X300-50-S FAQ
Yes, the MALJ20X300-50-S is discontinued. The direct replacement is the MBLJ20X300-50-S, which matches the 20 mm bore, 300 mm stroke, 50 mm adjuster, and G1/8 port. You will need to upgrade your switches from CS1-M / DS1-M to CMSG / DMSG / EMSG sensors.
The 50 mm rear adjuster creates a usable stroke window of 250-300 mm. The adjuster acts only as a travel stop and does not hold the load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X300-50-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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