This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X45-30S, 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 MALJ20X45-30S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S 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 15 to 45 mm. This model is discontinued — the direct replacement is the MBLJ20X45-30S.
- BoreØ20 mm
- Stroke45 mm
- Adjust window15–45 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X45-30S
- 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 MALJ20X45-30S
The AirTAC MALJ20X45-30S is a discontinued double-acting, double-rod mini cylinder with a 20mm bore and a 45mm stroke. It features a rear adjuster that lets you trim up to 30mm of travel, giving a usable stroke window of 15-45mm. The direct replacement is the MBLJ20X45-30S, which matches the bore, stroke, adjust code, G1/8 port, and mounting.
This -S variant includes a magnet for CS1-M or DS1-M switches, whereas the MBLJ replacement upgrades to CMSG, DMSG, or EMSG sensors. The MALJ uses threaded covers and a fixed rubber bumper, while the newer MBLJ features a riveted rolling-packed body. Remember that the rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X45-30S |
| Bore size | Ø20 mm |
| Stroke | 45 mm |
| Adjustable window | 15 – 45 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 MBLJ20X45-30S 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 MBLJ20X45-30S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×45 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 15–45 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 MALJ20X45-30S Is Used
Dispense Valve Positioning
Fine-tune the retraction height of a pneumatic glue dispense valve on an electronics packaging line, trimming up to 30mm to accommodate different syringe tips.
Wire Crimper Feed Guide
Adjust the end position of a wire feeding guide in an automated terminal crimper, ensuring precise material indexing before the crimping head fires.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S with MBLJ20X45-30S
To replace the discontinued MALJ20X45-30S, order the exact direct replacement MBLJ20X45-30S. Confirm the 20mm bore, 45mm stroke, 30mm adjust code, PT G1/8 port, M8x1.25 rod thread, and FA/LB mounting (there is no back cover or SDB option). The -S magnet on your old unit used CS1-M/DS1-M switches, so you must update to CMSG/DMSG/EMSG sensors for the MBLJ. The adjuster remains a travel stop, not a lock.
For sizing flexibility, stepping down is not an option as 20mm is the smallest bore. If your 45mm stroke is near the maximum for this frame, note that long strokes increase rod-to-side-load bending risks.
Upgrade checklist
- ✓ Order the MBLJ20X45-30S (same bore/stroke/adjust)
- ✓ Same 15–45 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 MBLJ20X45-30S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X45-30S FAQ
Yes, the MALJ20X45-30S is discontinued. The direct replacement is the MBLJ20X45-30S, which matches the 20mm bore, 45mm stroke, 30mm adjust code, G1/8 port, and mounting. You will need to upgrade your sensors, as the old CS1-M/DS1-M switches are replaced by CMSG/DMSG/EMSG switches on the MBLJ.
The -30 adjust code means you can trim up to 30mm at the rear, creating a usable stroke window of 15-45mm. The adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X45-30S 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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