This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X50-30, 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
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30 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.
- BoreØ20 mm
- Stroke50 mm
- Adjust window20–50 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X50-30
- 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
The AirTAC MALJ20X50-30 is a discontinued double-acting double-rod mini cylinder with a rear adjustable stroke. The 30 mm adjust code creates a usable extension window of 20-50 mm. The direct replacement is the MBLJ20X50-30, matching the 20 mm bore, 50 mm stroke, G1/8 port, and mounting.
This SKU lacks a magnet (-S), so it cannot accept a position sensor. The adjuster is a travel stop, not a lock—it sets the end position but will not hold a load without live air. During the upgrade, the threaded covers change to a riveted rolling-packed body. End impact is softened by a fixed rubber bumper, as no air cushion is present.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X50-30 |
| 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 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 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30
| 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 Is Used
Dispenser Nozzle Height Trim
Sets a precise variable depth for adhesive dots on uneven casings, preventing crush damage with the fixed rubber bumper.
Light Part Ejector
Trims the kick length for small plastic clips on an assembly fixture, ensuring the 132 N pull retracts fully without slamming.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30 with MBLJ20X50-30
To replace the MALJ20X50-30, install the direct replacement MBLJ20X50-30. Confirm the 20 mm bore, 50 mm stroke, 30 mm adjust code, G1/8 PT port, and FA/LB mounting (no back cover or SDB). Since this SKU has no magnet, you lose no sensors, but note the broader upgrade moves CS1-M/DS1-M switches to CMSG/DMSG/EMSG on magnetized models. The adjuster remains a travel stop, not a lock.
At 50 mm stroke, rod side-load is minimal, but keep the load axially aligned to avoid bending the Ø8 mm rod.
Upgrade checklist
- ✓ Order the MBLJ20X50-30 (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 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-30 FAQ
Yes, the MALJ20X50-30 is discontinued. The direct replacement is the MBLJ20X50-30, matching the 20 mm bore, 50 mm stroke, 30 mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The 30 mm adjuster creates a usable stroke window of 20-50 mm. Note this SKU has no magnet and cannot take a sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X50-30 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 → MBLJ20X50-30)
Tell us the quantity and destination — we quote the direct MBLJ20X50-30 replacement with price, stock and lead time, usually within 7-8 hours.