This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X120-40-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 MALJ20X120-40-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 40 mm, giving a usable end-position window from 80 to 120 mm. This model is discontinued — the direct replacement is the MBLJ20X120-40-S.
- BoreØ20 mm
- Stroke120 mm
- Adjust window80–120 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X120-40-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 MALJ20X120-40-S
The AirTAC MALJ20X120-40-S is a discontinued double-acting double-rod mini cylinder with a rear adjustable stroke stopper. The direct replacement is the MBLJ20X120-40-S, matching the 20mm bore, 120mm stroke, G1/8 port, and 40mm adjust code. By turning the rear screw, you trim up to 40mm of travel, creating a usable end-position window of 80-120mm without adding external stops.
This -S SKU includes a magnet for the older CS1-M / DS1-M reed switches, whereas the MBLJ replacement upgrades to CMSG / DMSG / EMSG sensors. The MALJ features threaded covers and a fixed rubber bumper to soften end impacts, while the MBLJ uses a riveted rolling-packed body. Remember that the rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air pressure.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X120-40-S |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Adjustable window | 80 – 120 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 MBLJ20X120-40-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 MBLJ20X120-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×120 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 80–120 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 MALJ20X120-40-S Is Used
Connector Insertion Jig
The 80-120mm adjustment window lets an operator fine-tune the push distance for seating delicate pin headers, preventing damage to the PCB.
Small Parts Ejector
Trimming 40mm off the 120mm stroke provides a soft retraction point for a rubber-bumpered ejector pin, safely pushing small plastic molds out of a machine.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S with MBLJ20X120-40-S
To replace the MALJ20X120-40-S, order the direct replacement MBLJ20X120-40-S. Confirm the 20mm bore, 120mm stroke, 40mm adjust code, PT G1/8 port, M8x1.25 rod thread, and FA/LB mounting (this series uses no back cover or SDB). If you need to step down, the next smaller bore is unavailable in this mini family, but you could reduce the stroke to a 100mm standard. Note that the adjuster is a stop, not a lock, and the -S magnet requires changing your CS1-M / DS1-M switches to CMSG / DMSG / EMSG models for the MBLJ.
Upgrade checklist
- ✓ Order the MBLJ20X120-40-S (same bore/stroke/adjust)
- ✓ Same 80–120 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 MBLJ20X120-40-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S FAQ
Yes, the MALJ20X120-40-S is discontinued. The direct replacement is the MBLJ20X120-40-S, matching the bore, stroke, adjust code, and port. You must upgrade your sensors from the old CS1-M / DS1-M switches to the CMSG / DMSG / EMSG family.
The 40mm adjuster creates a usable stroke window of 80-120mm. The adjuster is a travel stop, not a lock, and cannot hold a load without air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X120-40-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.
Recommended AirTAC MBLJ Replacements
Request a Quote (Airtac MALJ20 Adjustable Mini Cylinder MALJ20X120-40-S → MBLJ20X120-40-S)
Tell us the quantity and destination — we quote the direct MBLJ20X120-40-S replacement with price, stock and lead time, usually within 7-8 hours.