This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ20X125-40S, 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 MALJ20X125-40-S
The AirTAC Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-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 85 to 125 mm. This model is discontinued — the direct replacement is the MBLJ20X125-40-S.
- BoreØ20 mm
- Stroke125 mm
- Adjust window85–125 mm
- Port sizeG1/8
- Rod threadM8×1.25
- StatusDiscontinued → MBLJ20X125-40-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 MALJ20X125-40-S
The AirTAC MALJ20X125-40-S is a discontinued double-acting mini cylinder with a 20mm bore and 125mm stroke. The -40 adjust code lets you dial out up to 40mm of rear travel, creating a usable end-position window of 85-125mm. The direct replacement is the MBLJ20X125-40-S, matching the bore, stroke, G1/8 port, and force.
Two critical upgrade facts apply to the MBLJ replacement. First, the MALJ uses threaded covers, while the MBLJ uses a riveted rolling-packed body for superior integrity. Second, this MALJ -S magnet works with older CS1-M / DS1-M switches; the MBLJ upgrade uses CMSG / DMSG / EMSG sensors. Remember the rear adjuster is a travel stop, not a lock—it sets the end position but holds no load without live air. End impact is softened by a fixed rubber bumper.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-S Technical Specifications
| Model | Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ20X125-40-S |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Adjustable window | 85 – 125 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 MBLJ20X125-40-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 MBLJ20X125-40-S matches these values.
Model Code: Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -40 | Adjustable amount: trim the end to a 85–125 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 MALJ20X125-40-S Is Used
Dispensing Valve Tact Time
Trim the rear travel by 40mm to shorten the extend stroke on an adhesive dispensing valve, cutting cycle time while the fixed rubber bumper absorbs the repeated end impact.
Wire Stripper Positioning
Fine-tune the blade plunge on an automated wire stripping machine by adjusting the end stop, ensuring the 132N pull retracts the blade cleanly without crushing the copper conductor.
Replacing the Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-S with MBLJ20X125-40-S
To replace the MALJ20X125-40-S, order the exact direct replacement MBLJ20X125-40-S. Confirm the 20mm bore, 125mm stroke, 40mm adjust code, G1/8 port, PT threads, and FA/LB mounting (no back cover or SDB). The -S magnet means you must upgrade your switches from CS1-M / DS1-M to CMSG / DMSG / EMSG. The rear adjuster remains a travel stop, not a lock.
At 125mm stroke, the 8mm rod is highly susceptible to side-load bending—use guide rails to prevent rod distortion.
Upgrade checklist
- ✓ Order the MBLJ20X125-40-S (same bore/stroke/adjust)
- ✓ Same 85–125 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 MBLJ20X125-40-S instead of this discontinued model.
Airtac MALJ20 Adjustable Mini Cylinder MALJ20X125-40-S FAQ
Yes, the MALJ20X125-40-S is discontinued. The direct replacement is the MBLJ20X125-40-S, matching the 20mm bore, 125mm stroke, 40mm adjust, G1/8 port, and 32 kgf max force. You must upgrade your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG.
The -40 adjust code lets you trim up to 40mm at the rear, giving a usable stroke window of 85-125mm. The adjuster is a travel stop, not a lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ20X125-40-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
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