This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X70-30-S, 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 MALJ20X70-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-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 40 to 70 mm. This model is discontinued — the direct replacement is the MBLJ20X70-30-S.
- BoreØ20 mm
- Stroke70 mm
- Adjust window40–70 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X70-30-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 MALJ20X70-30-S
The AirTAC MALJ20X70-30-S is a discontinued double-acting, double-rod mini cylinder with a rear adjustable-stroke stopper. It provides a usable extension window of 40-70 mm by trimming up to 30 mm at the rear screw. The direct replacement is the MBLJ20X70-30-S, which matches the 20 mm bore, 70 mm stroke, G1/8 port, and 30 mm adjust code exactly.
It features a fixed rubber bumper and an M8x1.25 rod-end thread. The -S magnet on this MAL unit works with CS1-M / DS1-M switches, whereas the MBLJ upgrade moves to CMSG / DMSG / EMSG sensors and swaps the threaded covers for a riveted rolling-packed body.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X70-30-S |
| Bore size | Ø20 mm |
| Stroke | 70 mm |
| Adjustable window | 40 – 70 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 MBLJ20X70-30-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 MBLJ20X70-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×70 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 40–70 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 MALJ20X70-30-S Is Used
PCB Depaneling Saw Stop
Dials the exact 45-55 mm reach to position a circular saw blade guide.
Medical Vial Capping Head
Fine-tunes the 40-70 mm downstroke on a rotary capping machine. The fixed rubber bumper softens the impact on the plastic cap, while the rear stop lets operators change vial heights without swapping cylinders.
Light-Part Ejector Station
Trims the ejection stroke to 50 mm to push small plastic clips out of an injection mold. The 132 N pull force retracts the 8 mm rod quickly for the next 2-second machine cycle.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-S with MBLJ20X70-30-S
To replace this MALJ20X70-30-S, order the exact direct replacement MBLJ20X70-30-S. Confirm the 20 mm bore, 70 mm stroke, 30 mm adjust code, PT G1/8 port, and FA/LB mounting (there is no back cover or SDB option). The adjuster is a travel stop, not a lock, so it cannot hold a load without live air. If sizing either way, step down to a non-adjustable MAL16 (if available) for lighter duties, or step up to the MALJ25X70-30-S which boosts push force to 245 N at 0.5 MPa. At 70 mm stroke, rod side-load is minimal, but always ensure the M8x1.25 rod-end is aligned to prevent bending.
Upgrade checklist
- ✓ Order the MBLJ20X70-30-S (same bore/stroke/adjust)
- ✓ Same 40–70 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 MBLJ20X70-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X70-30-S FAQ
Yes, the MALJ20X70-30-S is discontinued. The direct replacement is the MBLJ20X70-30-S, matching the 20 mm bore, 70 mm stroke, 30 mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design and changes the -S magnet compatibility from CS1-M / DS1-M switches to CMSG / DMSG / EMSG sensors.
The -30 adjust code means you can trim up to 30 mm at the rear, creating a usable 40-70 mm stroke window. The adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X70-30-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 MALJ20X70-30-S → MBLJ20X70-30-S)
Tell us the quantity and destination — we quote the direct MBLJ20X70-30-S replacement with price, stock and lead time, usually within 7-8 hours.