This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X400-75, 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 MALJ20X400-75
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75 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 325 to 400 mm. This model is discontinued — the direct replacement is the MBLJ20X400-75.
- BoreØ20 mm
- Stroke400 mm
- Adjust window325–400 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X400-75
- 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 MALJ20X400-75
The AirTAC MALJ20X400-75 is a discontinued double-acting, double-rod mini cylinder featuring a rear adjustable stroke stopper. The direct replacement is the MBLJ20X400-75, matching the 20 mm bore, 400 mm stroke, 75 mm adjust code, G1/8 port, and mounting footprint. This non-standard 400 mm stroke exceeds the 300 mm standard maximum for bore 20, so it was produced as a made-to-order item.
The 75 mm adjuster lets you trim the rear end position, creating a usable stroke window from 325 mm up to 400 mm without external stops. Remember that the adjuster is a travel stop, not a lock; it will not hold a load without live air pressure. This SKU lacks the -S magnet, so it cannot accept a position sensor. The original MALJ uses threaded covers and CS1-M/DS1-M switches, whereas the current MBLJ upgrade features a riveted rolling-packed body and uses CMSG/DMSG/EMSG sensors. Impact is absorbed by a fixed rubber bumper, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X400-75 |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Adjustable window | 325 – 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 MBLJ20X400-75 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 MBLJ20X400-75 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×400 | Nominal stroke length in mm. |
| -75 | Adjustable amount: trim the end to a 325–400 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 MALJ20X400-75 Is Used
Textile loom beam let-off
Fine-tunes the end stop on a 400 mm extension to maintain precise tension on a textile loom, trimming up to 75 mm at the rear to sync warp let-off without machining new hard stops.
Woodworking sander depth-set
Sets the platen depth on an automated woodworking sander; the fixed rubber bumper absorbs the end impact while the rear screw adjusts the stroke window to match varying panel thicknesses.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75 with MBLJ20X400-75
To replace the MALJ20X400-75, order the direct replacement MBLJ20X400-75. Confirm your 20 mm bore, 400 mm stroke, 75 mm adjust code, G1/8 port, and PT thread. Mounting is FA or LB only; there is no back-cover or SDB option. Because this SKU has no -S magnet, it cannot take a sensor, but if you upgrade to an -S MBLJ, you must switch from the old CS1-M/DS1-M to the new CMSG/DMSG/EMSG switches. The adjuster sets the end position but does not hold load without air; use an external lock for held loads.
Because the 400 mm stroke is non-standard and exceeds the 300 mm max, be mindful of rod-bending and side-load on long extensions; rigidly guide the load to prevent rod damage.
Upgrade checklist
- ✓ Order the MBLJ20X400-75 (same bore/stroke/adjust)
- ✓ Same 325–400 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 MBLJ20X400-75 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X400-75 FAQ
Yes, the MALJ20X400-75 is discontinued. The direct replacement is the MBLJ20X400-75, which matches the 20 mm bore, 400 mm stroke, 75 mm adjust code, G1/8 port, and mounting. The MBLJ upgrade uses a riveted rolling-packed body instead of threaded covers, and if you need a sensor, you must use CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M.
The 75 mm adjust code lets you trim the rear end position by up to 75 mm, giving a usable stroke window from 325 mm to 400 mm. The adjuster is a travel stop, not a lock, and will not hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X400-75 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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