Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 75–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable75–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50
The AirTAC MBLCJ25X125-50 is a compact double-acting mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 245 N of push force at 0.5 MPa. The 50 mm rear adjuster creates a usable travel window of 75 to 125 mm, allowing you to dial in the exact end position for a 125 mm move. The screw-tunable end cushions absorb kinetic energy to protect the end covers during faster cycling.
Built with a riveted rolling-packed aluminum barrel and a hard-chrome plated carbon-steel rod, it handles operating pressures up to 1.0 MPa. This specific SKU lacks a built-in magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors. The rear stopper sets the travel limit but does not lock the load in place; external holding mechanics are required if the air supply drops.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 75–125 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 300 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -50 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 Is Used
PCB Depaneling Saw Feed
Feeds a circular saw blade with 245 N push force, using the 75-125 mm adjustable window to set precise cutting depth without reprogramming the PLC.
Textile Loom Tensioner
Adjusts fabric tension on a weaving loom, relying on the tunable air cushion to softly decelerate the 125 mm stroke and prevent yarn snapping.
Small Parts Ejector
Ejects molded plastic caps from a press, using the 50 mm rear stroke adjustment to tune the ejection distance based on conveyor clearance.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 the Right Cylinder?
Choose this 25 mm bore when you need 245 N push force at 0.5 MPa over a 125 mm stroke with fine end-position tuning. If your application requires less force, stepping down to the 20 mm bore yields 157 N push. If you need more thrust, stepping up to the 32 mm bore provides 402 N push. Compared to the MBLJ series, this MBLCJ model uses tunable air cushions instead of a fixed rubber bumper, making it superior for heavier or faster payloads that need controlled deceleration. Against the MBLC series, this version adds the 50 mm rear stroke adjuster.
Remember that the rear adjuster is a travel stop, not a mechanical lock—the rod will drift if air pressure is removed. Mounting is limited to Basic, FA flange, or LB foot styles; there is no SDB pivot or back-cover option. To replace this unit, match the 25 mm bore, 125 mm stroke, 50 mm adjust code, G1/8 port, PT thread, and confirm no magnet is required. The 125 mm stroke is well within the 300 mm maximum for this bore, but always ensure external guides support side loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50 FAQ
At 0.5 MPa it provides 245 N push and 206 N pull force. At 0.7 MPa, push increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa. The rear adjuster and air cushion only control travel and deceleration; they do not lock the rod, so the cylinder cannot hold position without live air pressure.
No. This specific MBLCJ25X125-50 SKU does not have the -S code, meaning it lacks a built-in magnet. It cannot be used with AirTAC CMSG, DMSG, or EMSG position sensors. You would need the MBLCJ25X125-50S variant for reed or electronic switch detection.
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