This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X350-50, 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 MALJ20X350-50
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50 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 300 to 350 mm. This model is discontinued — the direct replacement is the MBLJ20X350-50.
- BoreØ20 mm
- Stroke350 mm
- Adjust window300–350 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X350-50
- 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 MALJ20X350-50
A 50mm rear adjuster screw provides a usable end-position window of 300-350mm, letting you dial in reach without adding external stops.
The direct replacement is the MBLJ20X350-50, matching the bore, stroke, adjust code, and G1/8 port. This legacy MALJ has threaded covers and no magnet, meaning it cannot accept a position sensor. The MBLJ upgrade shifts to a riveted rolling-packed body. End impact is absorbed by a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X350-50 |
| Bore size | Ø20 mm |
| Stroke | 350 mm |
| Adjustable window | 300 – 350 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 MBLJ20X350-50 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 MBLJ20X350-50 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×350 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 300–350 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 MALJ20X350-50 Is Used
PCB Edge Router Z-Axis
Trims the 300-350mm descent of a router spindle.
Long-Reach Tube Sorter
Actuates a 350mm arm in a pneumatic sorting lane. The 132N pull retracts the diverter, and the 50mm adjuster compensates for varying tube lengths without machining new hard stops.
Film Roll Tension Arm
Sets the rest position of a 350mm tensioning arm in a packaging line. The fixed rubber bumper softens the end impact, while the stop screw fine-tunes the slack take-up window.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50 with MBLJ20X350-50
Replace the MALJ20X350-50 directly with the MBLJ20X350-50. Confirm the 20mm bore, 350mm stroke, 50mm adjust code, G1/8 port, and PT thread form. Mounting is FA or LB only; there is no back cover or SDB option. Because this SKU lacks a -S magnet, it cannot take a sensor. If you need sensing, the MBLJ upgrade uses CMSG/DMSG/EMSG switches. The rear adjuster is a travel stop, not a lock; it will not hold a load without live air.
For sizing, the next size down is the 15mm bore (confirm from datasheet), but stepping down drops your 0.5 MPa push force to roughly 106N. At 350mm, this 20mm rod is highly susceptible to side-load bending; use precise guide rails to prevent rod binding.
Upgrade checklist
- ✓ Order the MBLJ20X350-50 (same bore/stroke/adjust)
- ✓ Same 300–350 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 MBLJ20X350-50 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50 FAQ
Yes, the MALJ20X350-50 is discontinued. The direct replacement is the MBLJ20X350-50, matching the 20mm bore, 350mm stroke, 50mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The usable stroke window is 300-350mm, set by the 50mm rear adjuster. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X350-50 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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