This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X450-20, 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 MALJ20X450-20
The AirTAC MALJ20 Adjustable Mini Cylinder MALJ20X450-20 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 430 to 450 mm. This model is discontinued — the direct replacement is the MBLJ20X450-20.
- BoreØ20 mm
- Stroke450 mm
- Adjust window430–450 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X450-20
- 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 MALJ20X450-20
The AirTAC MALJ20X450-20 is a discontinued double-acting mini cylinder with a 20mm bore and a non-standard 450mm stroke (exceeding the 300mm standard, making it a made-to-order item). It features a rear adjuster providing a usable stroke window of 430-450mm. The direct replacement is the MBLJ20X450-20, sharing the same G1/8 port, 8mm rod, and mounting.
This SKU lacks a magnet (-S) and cannot accept a position sensor. The adjuster is a travel stop, not a lock; it will not hold a load without live air. Unlike the older threaded covers on this MALJ, the MBLJ replacement uses a riveted rolling-packed body. Both use a fixed rubber bumper for end impact, not an adjustable air cushion.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X450-20 |
| Bore size | Ø20 mm |
| Stroke | 450 mm |
| Adjustable window | 430 – 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 MBLJ20X450-20 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 MBLJ20X450-20 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×450 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 430–450 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 MALJ20X450-20 Is Used
PCB Edge Guide Trimming
Dials the exact 430-450mm reach on a conveyor cutting fixture.
Long-Reach Lever Actuation
Extends a pivoting lever in a textile folding machine. The 20mm adjuster fine-tunes the resting position to match varying fabric thicknesses.
Carton Flap Plowing
Pushes secondary carton flaps on a packaging line. The fixed rubber bumper absorbs the 450mm extension impact, protecting the 8mm rod.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20 with MBLJ20X450-20
To replace this MALJ20X450-20, order the direct replacement MBLJ20X450-20. Confirm your 20mm bore, 450mm stroke, 20mm adjust code, G1/8 port, PT threads, and FA/LB mounting (no back cover or SDB allowed). Since this is a non-magnet SKU, you cannot run a sensor; if you need sensing, upgrade to an MBLJ20X450-20S which uses the newer CMSG/DMSG/EMSG switches instead of the older CS1-M/DS1-M. The rear adjuster sets end position but does not hold load without air.
At 450mm, the 8mm rod is highly susceptible to bending from side loads—ensure strict guided load alignment to prevent premature seal failure.
Upgrade checklist
- ✓ Order the MBLJ20X450-20 (same bore/stroke/adjust)
- ✓ Same 430–450 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 MBLJ20X450-20 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X450-20 FAQ
Yes, the MALJ20X450-20 is discontinued. The direct replacement is the MBLJ20X450-20, matching the 20mm bore, 450mm stroke, 20mm adjust code, G1/8 port, and FA/LB mounting. The MBLJ upgrades to a riveted rolling-packed body from the original threaded covers.
The rear adjuster provides a 430-450mm usable stroke window but acts only as a travel stop; it cannot hold a load without live air pressure. Additionally, this non-S SKU cannot accept a position sensor.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X450-20 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 MALJ20X450-20 → MBLJ20X450-20)
Tell us the quantity and destination — we quote the direct MBLJ20X450-20 replacement with price, stock and lead time, usually within 7-8 hours.