This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X350-50-S, 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 MALJ20X350-50-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 50 mm, giving a usable end-position window from 300 to 350 mm. This model is discontinued — the direct replacement is the MBLJ20X350-50-S.
- BoreØ20 mm
- Stroke350 mm
- Adjust window300–350 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X350-50-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 MALJ20X350-50-S
The AirTAC MALJ20X350-50-S is a discontinued double-acting, double-rod adjustable-stroke mini cylinder. It features a 20 mm bore, a 350 mm stroke, and a 50 mm rear adjuster, creating a usable end-position window of 300-350 mm. The direct replacement is the MBLJ20X350-50-S, matching bore, stroke, force, G1/8 port, and mounting.
This non-standard 350 mm stroke exceeds the 300 mm max standard for bore 20, meaning it was a made-to-order item. The rear adjuster is a travel stop to fine-tune reach, not a lock to hold loads without live air. The -S magnet works with CS1-M/DS1-M switches. The original MALJ has threaded covers and a fixed rubber bumper, while the MBLJ upgrade features a riveted rolling-packed body and CMSG/DMSG/EMSG sensors.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X350-50-S |
| Bore size | Ø20 mm |
| Stroke | 350 mm |
| Adjustable window | 300 – 350 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 MBLJ20X350-50-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 MBLJ20X350-50-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×350 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 300–350 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 MALJ20X350-50-S Is Used
Long-Reach Wire Termination
Fine-tune the end position on a wire harness crimping press, trimming up to 50 mm at the rear to accommodate different terminal heights while using the 350 mm non-standard stroke.
Film Web Tensioning
Adjust the stroke window on a packaging film web guide to maintain exact material tension during roll changes, relying on the fixed rubber bumper to soften the 132 N pull impact.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S with MBLJ20X350-50-S
To replace the MALJ20X350-50-S, order the exact direct replacement MBLJ20X350-50-S. Confirm the 20 mm bore, 350 mm stroke, 50 mm adjust code, G1/8 port, M8x1.25 rod thread, and FA/LB mounting (no back cover or SDB). The -S magnet requires switching from CS1-M/DS1-M to CMSG/DMSG/EMSG switches. Remember the rear adjuster is a travel stop, not a lock.
Since the 350 mm stroke exceeds the 300 mm standard and approaches the max limit, be mindful of rod-bending under side loads. The fixed rubber bumper softens end impact, but an external lock is required for held loads.
Upgrade checklist
- ✓ Order the MBLJ20X350-50-S (same bore/stroke/adjust)
- ✓ Same 300–350 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 MBLJ20X350-50-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X350-50-S FAQ
Yes, the MALJ20X350-50-S is discontinued. The direct replacement is the MBLJ20X350-50-S, matching the 20 mm bore, 350 mm stroke, 50 mm adjust code, G1/8 port, and mounting. The MBLJ upgrades the body to a riveted rolling-packed design and requires CMSG/DMSG/EMSG sensors instead of the older CS1-M/DS1-M switches.
The 50 mm adjust code lets you trim the rear travel stop, creating a usable window from 300 to 350 mm. It sets the end position but does not hold load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X350-50-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.
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