This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-75-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 MALJ20X450-75-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 75 mm, giving a usable end-position window from 375 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-75-S.
- BoreØ20 mm
- Stroke450 mm
- Adjust window375–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-75-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 MALJ20X450-75-S
The AirTAC MALJ20X450-75-S is a discontinued double-acting double-rod mini cylinder with a rear adjustable stroke stopper. It is a non-standard made-to-order unit because the 450 mm stroke exceeds the 300 mm standard limit for a 20 mm bore. The direct replacement is the MBLJ20X450-75-S.
This -S SKU includes a magnet for CS1-M or DS1-M reed switches, whereas the MBLJ upgrade uses CMSG/DMSG/EMSG sensors. The original MALJ features threaded covers, while the MBLJ replacement uses a riveted rolling-packed body. The rear adjuster is a travel stop, not a lock, and end impact is absorbed by a fixed rubber bumper. With a 450 mm stroke on an 8 mm rod, be mindful of rod bending under side loads.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-75-S |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 375 – 450 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 MBLJ20X450-75-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 MBLJ20X450-75-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×450 | Nominal stroke length in mm. |
| -75 | Adjustable amount: trim the end to a 375–450 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 MALJ20X450-75-S Is Used
Textile Loom Tensioner
Sets precise yarn guide depth on a textile loom, relying on the 75 mm rear stop to adjust the end position while the fixed rubber bumper absorbs impact.
Thin Film Web Guide
Trims the actuator end point on a packaging web guide to align delicate film, where the 8 mm rod and 132 N pull force handle light tracking duties.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S with MBLJ20X450-75-S
To replace this MALJ20X450-75-S, install the direct replacement MBLJ20X450-75-S. Confirm the 20 mm bore, 450 mm stroke, 75 mm adjust code, G1/8 port, PT thread, and Basic mounting. The -S magnet changes sensor families from CS1-M/DS1-M to CMSG/DMSG/EMSG. No back cover or SDB is used. The adjuster sets the end position but will not hold a load without live air.
Given the 450 mm stroke, minimize side loads to prevent rod bending, and use an external lock if holding is required.
Upgrade checklist
- ✓ Order the MBLJ20X450-75-S (same bore/stroke/adjust)
- ✓ Same 375–450 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 MBLJ20X450-75-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-75-S FAQ
Yes, the MALJ20X450-75-S is discontinued. The direct replacement is the MBLJ20X450-75-S, matching the 20 mm bore, 450 mm stroke, 75 mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design and changes the -S magnet sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The 75 mm adjust code creates a usable stroke window of 375-450 mm. Note that the rear adjuster is a travel stop, not a lock, and cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-75-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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