This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X50-20S, 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 MALJ20X50-20-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 30 to 50 mm. This model is discontinued — the direct replacement is the MBLJ20X50-20-S.
- BoreØ20 mm
- Stroke50 mm
- Adjust window30–50 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X50-20-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 MALJ20X50-20-S
The AirTAC MALJ20X50-20-S is a discontinued double-acting mini cylinder with a 20mm bore, 50mm stroke, and a 20mm rear adjuster. This gives a usable extension window of 30-50mm. The direct replacement is the MBLJ20X50-20-S, matching bore, stroke, adjust code, and G1/8 port.
This -S SKU includes a magnet for CS1-M or DS1-M switches; the MBLJ upgrade shifts to CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers, whereas the MBLJ features a riveted rolling-packed body. The rear screw is a travel stop to fine-tune depth, not a lock to hold loads without air. End impact is softened by a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X50-20-S |
| Bore size | Ø20 mm |
| Stroke | 50 mm |
| Adjustable window | 30 – 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 MBLJ20X50-20-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 MBLJ20X50-20-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-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. |
| -20 | Adjustable amount: trim the end to a 30–50 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 MALJ20X50-20-S Is Used
PCB Probe Depth Setter
Dials the exact 30-50mm reach for spring-loaded test pins on an automated PCB bed-of-nails fixture without swapping hardware.
Label Applicator Wipe
Trims the rear stop to tune the wipe distance of a 157N tamping head pressing adhesive labels onto small cosmetic cartons.
Connector Crimp Press
Sets a precise 35mm bottoming position for crimping wire terminals, relying on the fixed rubber bumper to absorb the end impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-S with MBLJ20X50-20-S
To replace the MALJ20X50-20-S, order the MBLJ20X50-20-S. Confirm the 20mm bore, 50mm stroke, 20mm adjust code, G1/8 PT port, and M8x1.25 rod thread. Mounting is Basic, FA, or LB only—there is no back cover or SDB option. Remember the adjuster sets end position but does not hold load. Your -S magnet requires changing from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors.
For sizing, stepping down is not an option as 20mm is the smallest bore. This 50mm stroke is well within safe limits, avoiding rod-bending side-load risks seen on longer strokes.
Upgrade checklist
- ✓ Order the MBLJ20X50-20-S (same bore/stroke/adjust)
- ✓ Same 30–50 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 MBLJ20X50-20-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X50-20-S FAQ
Yes, the MALJ20X50-20-S is discontinued. The direct replacement is the MBLJ20X50-20-S, which matches the 20mm bore, 50mm stroke, 20mm adjuster, and G1/8 port. You will need to upgrade your switches from CS1-M/DS1-M to CMSG/DMSG/EMSG sensors.
The 20mm adjuster is a travel stop that lets you shorten the end position, creating a usable 30-50mm stroke window. It does not hold the load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X50-20-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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