This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X175-30S, 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 MALJ20X175-30-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-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 145 to 175 mm. This model is discontinued — the direct replacement is the MBLJ20X175-30-S.
- BoreØ20 mm
- Stroke175 mm
- Adjust window145–175 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X175-30-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 MALJ20X175-30-S
The AirTAC MALJ20X175-30-S is a discontinued double-acting double-rod cylinder with a 20mm bore and 175mm stroke. A rear screw lets you trim up to 30mm, giving a usable 145-175mm window. The direct replacement is the MBLJ20X175-30-S, matching bore, stroke, force, G1/8 port, and mounting.
This -S SKU has a magnet for CS1-M/DS1-M switches; the MBLJ upgrade uses CMSG/DMSG/EMSG sensors. The MALJ uses threaded covers, while the MBLJ features a riveted rolling-packed body. The adjuster is a travel stop, not a lock, and end impact is absorbed by a fixed rubber bumper, not an air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X175-30-S |
| Bore size | Ø20 mm |
| Stroke | 175 mm |
| Adjustable window | 145 – 175 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 MBLJ20X175-30-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 MBLJ20X175-30-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×175 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 145–175 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 MALJ20X175-30-S Is Used
Textile Loom Tensioner
Fine-tunes the guide arm extension on a weaving machine, trimming the 30mm rear stop to perfectly tension delicate yarns without snapping them.
Carton Flap Folder
Adjusts the folding paddle position on a packaging line, allowing operators to change carton widths by shortening the stroke window rather than remounting hardware.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-S with MBLJ20X175-30-S
To replace this MALJ20X175-30-S, order the MBLJ20X175-30-S. Confirm the 20mm bore, 175mm stroke, 30mm adjust code, G1/8 port, PT thread, and FA/LB mounting (no back cover or SDB). Note the sensor family change from CS1-M/DS1-M to CMSG/DMSG/EMSG. The adjuster sets end position but will not hold a load without live air.
At 175mm stroke, minimize side-loading to prevent rod bending, as the 8mm rod has limited bending resistance.
Upgrade checklist
- ✓ Order the MBLJ20X175-30-S (same bore/stroke/adjust)
- ✓ Same 145–175 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 MBLJ20X175-30-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X175-30-S FAQ
Yes, the MALJ20X175-30-S is discontinued. The direct replacement is the MBLJ20X175-30-S, which matches the 20mm bore, 175mm stroke, 30mm adjuster, and G1/8 port. You will need to upgrade your sensors from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The 30mm rear adjuster creates a usable stroke window of 145-175mm. The adjuster is a travel stop, not a lock, and cannot hold a load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X175-30-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
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