This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X80-30SLB, 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 MALJ20X80-30SLB
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB 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 50 to 80 mm. This model is discontinued — the direct replacement is the MBLJ20X80-30SLB.
- BoreØ20 mm
- Stroke80 mm
- Adjust window50–80 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X80-30SLB
- 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 MALJ20X80-30SLB
The AirTAC MALJ20X80-30SLB is a discontinued double-acting mini cylinder with a 20 mm bore and an 80 mm stroke. It features an LB foot mount, a G1/8 port, and a magnet. The -30 adjust code lets you dial out up to 30 mm of rear travel, creating a usable 50-80 mm end-position window. The direct replacement is the MBLJ20X80-30SLB, matching the bore, stroke, adjuster, force, and LB mount.
This cylinder uses a fixed rubber bumper, meaning the adjustable stroke sets the end position but is not an adjustable cushion. The rear adjuster is a travel stop, not a lock, so it will not hold a load without live air. Upgrading to the MBLJ20X80-30SLB changes the sensor family from the older CS1-M / DS1-M to CMSG / DMSG / EMSG, and swaps the threaded covers for a riveted rolling-packed body. The 8 mm carbon-steel rod has a 20 um hard chrome plating to resist wear.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X80-30SLB |
| Bore size | Ø20 mm |
| Stroke | 80 mm |
| Adjustable window | 50 – 80 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 MBLJ20X80-30SLB 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 MBLJ20X80-30SLB matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×80 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 50–80 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 MALJ20X80-30SLB Is Used
PCB Depaneling Saw
Dials the 50-80 mm reach to set the exact cutting depth on a circular saw blade without remounting the cylinder.
Connector Insertion Arm
Uses the LB foot mount to hold firm while trimming the stroke to seat a delicate ribbon connector perfectly at 60 mm.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB with MBLJ20X80-30SLB
To replace the MALJ20X80-30SLB, install the MBLJ20X80-30SLB. Confirm the 20 mm bore, 80 mm stroke, 30 mm adjust code, G1/8 PT port, and LB foot mount are correct. The MBLJ keeps the same force but uses CMSG / DMSG / EMSG sensors instead of the CS1-M / DS1-M switches. There is no back cover or SDB option. The adjuster is a stop, not a lock, so add an external lock for held loads.
Upgrade checklist
- ✓ Order the MBLJ20X80-30SLB (same bore/stroke/adjust)
- ✓ Same 50–80 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 MBLJ20X80-30SLB instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X80-30SLB FAQ
Yes, the MALJ20X80-30SLB is discontinued. The direct replacement is the MBLJ20X80-30SLB. It matches the 20 mm bore, 80 mm stroke, 30 mm adjust code, G1/8 port, and LB mount. You will need to upgrade your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG.
The -30 adjust code is a rear travel stop that lets you shorten the stroke by up to 30 mm, creating a usable 50-80 mm window. It does not hold the load without air and is not an adjustable cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X80-30SLB 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 MALJ20X80-30SLB → MBLJ20X80-30SLB)
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