This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X50-30S, 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 MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-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 20 to 50 mm. This model is discontinued — the direct replacement is the MBLJ20X50-30-S.
- BoreØ20 mm
- Stroke50 mm
- Adjust window20–50 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X50-30-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 MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S
The AirTAC MALJ20X50-30-S is a discontinued double-acting double-rod mini cylinder with a 20mm bore and 50mm stroke. Its rear adjuster trims up to 30mm, yielding a usable 20-50mm end-position window. The direct replacement is the MBLJ20X50-30-S, matching bore, stroke, adjust code, port and force.
This -S SKU includes a magnet for CS1-M / DS1-M switches; the MBLJ upgrade moves to CMSG / DMSG / EMSG sensors. The MALJ features threaded covers and a fixed rubber bumper, while the MBLJ uses a riveted rolling-packed body. The adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load without live air.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X50-30-S |
| Bore size | Ø20 mm |
| Stroke | 50 mm |
| Adjustable window | 20 – 50 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 MBLJ20X50-30-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 MBLJ20X50-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×50 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 20–50 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 MALJ20X50-30-S Is Used
Wire Straightener Die
Fine-tune the retract distance of a wire straightening die by up to 30mm, allowing operators to change wire feed lengths without physically swapping the cylinder body or adding external spacers.
Micro-Clamp Fixture
Adjust the end position on a micro-clamp fixture for delicate electronic connectors, using the fixed rubber bumper to soften the 132N pull impact at the precise end of the stroke.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S with MBLJ20X50-30-S
To replace the MALJ20X50-30-S, install the MBLJ20X50-30-S. Confirm the 20mm bore, 50mm stroke, 30mm adjust code, G1/8 port, PT threads, and FA/LB mounting (no back cover or SDB). The -S magnet changes the sensor family from CS1-M / DS1-M to CMSG / DMSG / EMSG. Remember the adjuster is a stop, not a lock.
If your stroke exceeds 300mm, use a guide to prevent rod-bending side loads.
Upgrade checklist
- ✓ Order the MBLJ20X50-30-S (same bore/stroke/adjust)
- ✓ Same 20–50 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 MBLJ20X50-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S FAQ
Yes, the MALJ20X50-30-S is discontinued. The direct replacement is the MBLJ20X50-30-S, which matches the 20mm bore, 50mm stroke, 30mm adjust code, G1/8 port, and force ratings. 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 usable stroke window is 20-50mm because the 30mm adjuster trims the 50mm base stroke. The rear adjuster is a travel stop, not a lock, and will not hold a load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X50-30-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
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30-S → MBLJ20X50-30-S)
Tell us the quantity and destination — we quote the direct MBLJ20X50-30-S replacement with price, stock and lead time, usually within 7-8 hours.