This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the drop-in replacement B01-MBLJ40X125-50S, 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 B01-MALJ Special Application Cylinder B01-MALJ40X125-50S
The AirTAC Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S 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 75 to 125 mm. This model is discontinued — the drop-in replacement is the B01-MBLJ40X125-50S.
- BoreØ40 mm
- Stroke125 mm
- Adjust window75–125 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → B01-MBLJ40X125-50S
- 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 B01-MALJ Special Application Cylinder B01-MALJ40X125-50S
The B01-MALJ40X125-50S is a discontinued, double-acting single-rod mini cylinder. The B01- prefix marks this as an AirTAC application-dedicated (customer-specified) variant of the base MALJ40X125-50S, meaning it is mechanically identical to the standard model. It provides a usable stroke window of 75-125 mm via a 50 mm rear adjuster. At 0.5 MPa it delivers 628 N push and 528 N pull force.
The exact drop-in replacement is the MBLJ40X125-50S, sharing the same 40 mm bore, G1/4 port, and 128 kgf maximum force. This original MALJ uses threaded covers and a CS1-M / DS1-M magnet sensor, whereas the MBLJ upgrades to a riveted rolling-packed body and CMSG / DMSG / EMSG switches. The rear adjuster is a travel stop, not a lock; it sets the end position but will not hold a load without live air. Impact is absorbed by a fixed rubber bumper, not an adjustable air cushion.
Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S Technical Specifications
| Model | Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | B01-MBLJ40X125-50S |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Adjustable window | 75 – 125 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 B01-MBLJ40X125-50S carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Single-rod force, same as a standard MAL of this bore. The B01-MBLJ40X125-50S matches these values.
Model Code: Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×125 | Nominal stroke length in mm. |
| -50 | Adjustable amount: trim the end to a 75–125 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 B01-MALJ Special Application Cylinder B01-MALJ40X125-50S Is Used
Press-Fit Pin Insertion
Dial in the 75-125 mm reach to seat dowel pins without changing fixtures, using the 628 N push force to overcome insertion resistance on automated assembly jigs.
PCB Router Depth Stop
Set a precise retract distance for a routing spindle, leveraging the 880 N force at 0.7 MPa to hold the cutting head against vibration while trimming circuit boards.
Pallet Wrapper Film Clamp
Fine-tune the grip stroke on a stretch film carriage, adjusting the 50 mm window to accommodate varying load widths without repositioning the entire packaging cell.
Replacing the Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S with B01-MBLJ40X125-50S
To replace the B01-MALJ40X125-50S, install the MBLJ40X125-50S. Confirm the 40 mm bore, 125 mm stroke, 50 mm adjust code, G1/4 port, and PT thread. Mounting is Basic, FA, or LB only (no back-cover or SDB codes apply). The -S magnet changes sensor families from the old CS1-M / DS1-M to the new CMSG / DMSG / EMSG. If you need to step down, the 32 mm bore offers 402 N push at 0.5 MPa; if you need to step up, this 40 mm bore is the largest available, providing 628 N push. Remember the adjuster sets the 75-125 mm end position but is a stop, not a lock.
Upgrade checklist
- ✓ Order the B01-MBLJ40X125-50S (same bore/stroke/adjust)
- ✓ Same 75–125 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 B01-MBLJ40X125-50S instead of this discontinued model.
Airtac B01-MALJ Special Application Cylinder B01-MALJ40X125-50S FAQ
Yes, the B01-MALJ40X125-50S is discontinued. The B01- prefix simply denotes an application-dedicated build of the standard MALJ40X125-50S. The exact drop-in replacement is the MBLJ40X125-50S, which matches the 40 mm bore, 125 mm stroke, 50 mm adjust code, and G1/4 port. You will need to upgrade your sensors from CS1-M / DS1-M to CMSG / DMSG / EMSG.
The 40 mm bore provides 628 N push and 528 N pull at 0.5 MPa, 880 N push at 0.7 MPa, and a maximum of 128 kgf at 1.0 MPa. The -50 adjust code lets you trim the rear position by up to 50 mm, creating a usable stroke window of 75-125 mm. This adjuster acts only as a travel stop and does not hold the load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Drop-in Upgrade
The B01-MBLJ40X125-50S 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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