This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-30, 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 MALJ20X400-30
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30 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 370 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-30.
- BoreØ20 mm
- Stroke400 mm
- Adjust window370–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-30
- 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 MALJ20X400-30
The AirTAC MALJ20X400-30 is a discontinued double-acting mini cylinder with a 20mm bore and 400mm stroke. It features a 30mm rear adjuster, creating a usable end-position window of 370-400mm. The direct replacement is the MBLJ20X400-30, matching bore, stroke, and G1/8 port. This SKU lacks a magnet (-S), so it cannot accept a position sensor.
The rear adjuster sets travel limits but acts only as a mechanical stop, not a load lock. Unlike the threaded covers on this MALJ, the MBLJ replacement features a riveted rolling-packed body. Both use a fixed rubber bumper to soften end impacts. As a 400mm stroke exceeds the 300mm standard for this bore, it is a non-standard, made-to-order part requiring careful rod-side-load management.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-30 |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 370 – 400 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 MBLJ20X400-30 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 MBLJ20X400-30 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×400 | Nominal stroke length in mm. |
| -30 | Adjustable amount: trim the end to a 370–400 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 MALJ20X400-30 Is Used
PCB Edge Router Depth
Dials the exact 370-400mm reach for a depaneling router.
Textile Loom Tensioner
Sets a variable thread-guide position on a weaving machine. The 8mm rod withstands high-speed cycling, and the fixed rubber bumper absorbs the kinetic energy of the 400mm travel at speed.
Thin Film Winder
Trims the lay-on roller position for a plastic film winder. The 30mm adjustment window allows operators to tune wrap angles on the machine without replacing the entire cylinder body.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30 with MBLJ20X400-30
To replace this MALJ20X400-30, order the direct replacement MBLJ20X400-30. Confirm the 20mm bore, 400mm stroke, 30mm adjust code, G1/8 port, and PT thread. Mounting is FA or LB only (no back cover or SDB). Since this SKU lacks a magnet, it cannot hold a sensor; if you need switches, step up to an MBLJ20X400-30S and use CMSG/DMSG/EMSG sensors instead of the older CS1-M/DS1-M. The adjuster is a travel stop, not a lock; add an external lock to hold loads.
Because 400mm exceeds the 300mm max standard stroke for a 20mm bore, this is non-standard. On a stroke this long, minimize rod side-load to prevent bending and premature seal wear.
Upgrade checklist
- ✓ Order the MBLJ20X400-30 (same bore/stroke/adjust)
- ✓ Same 370–400 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 MBLJ20X400-30 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-30 FAQ
Yes, the MALJ20X400-30 is discontinued. The direct replacement is the MBLJ20X400-30, matching the 20mm bore, 400mm stroke, 30mm adjuster, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design from the original threaded covers.
The 30mm rear adjuster allows a usable stroke window of 370-400mm. Note that the adjuster is a travel stop, not a lock, and this non-magnet SKU cannot accept a sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-30 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 MALJ20X400-30 → MBLJ20X400-30)
Tell us the quantity and destination — we quote the direct MBLJ20X400-30 replacement with price, stock and lead time, usually within 7-8 hours.