This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X500-100, 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 MALJ20X500-100
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100 is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 100 mm, giving a usable end-position window from 400 to 500 mm. This model is discontinued — the direct replacement is the MBLJ20X500-100.
- BoreØ20 mm
- Stroke500 mm
- Adjust window400–500 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X500-100
- 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 MALJ20X500-100
The AirTAC MALJ20X500-100 is a discontinued adjustable-stroke mini cylinder with a 20mm bore and 500mm stroke. The 100mm rear adjuster creates a usable 400-500mm end-position window. The direct replacement is the MBLJ20X500-100.
This non-standard 500mm stroke exceeds the 300mm max for bore 20, making it a made-to-order item. The rear screw is a travel stop, not a lock. It has a fixed rubber bumper and threaded covers. This SKU lacks a magnet, so it cannot take a position sensor.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100 Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100 |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X500-100 |
| Bore size | Ø20 mm |
| Stroke | 500 mm |
| Adjustable window | 400 – 500 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 MBLJ20X500-100 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 MBLJ20X500-100 matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×500 | Nominal stroke length in mm. |
| -100 | Adjustable amount: trim the end to a 400–500 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 MALJ20X500-100 Is Used
Film web edge trimmer
Fine-tunes the rear travel on a packaging slitter to set exact blade depth, preventing over-extension on a 500mm stroke while the rubber bumper absorbs end impact.
Carton flap folder
Adjusts the end position on a case erector to fold varying carton depths, relying on the 8mm rod and M8x1.25 thread for precise mechanical reach.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100 with MBLJ20X500-100
Replace with the MBLJ20X500-100: it matches the 20mm bore, 500mm stroke, 100mm adjust code, G1/8 port, PT threads, and FA/LB mounting (no back cover or SDB). The MBLJ upgrades to a riveted body. For lighter loads, a 20mm fixed-stroke MAL might work. At 500mm stroke, rod side-load risks bending the 8mm rod; use a guide. The adjuster sets position but does not hold load without air.
Upgrade checklist
- ✓ Order the MBLJ20X500-100 (same bore/stroke/adjust)
- ✓ Same 400–500 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 MBLJ20X500-100 instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X500-100 FAQ
Yes, the MALJ20X500-100 is discontinued. The direct replacement is the MBLJ20X500-100, which shares the same 20mm bore, 500mm stroke, 100mm adjust code, and G1/8 port. The MBLJ upgrades the body to a riveted rolling-packed design.
At 0.5MPa it pushes 157N and pulls 132N; at 0.7MPa it pushes 220N; max force is 32kgf at 1.0MPa. The 100mm adjust code lets you trim the 500mm stroke to a 400-500mm window. The 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 MBLJ20X500-100 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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