Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40 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 40mm for a usable window of 85–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable85–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40
The AirTAC MBLCJ25X125-40 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and dual adjustable air cushions. It delivers 245 N of push force at 0.5 MPa. The rear stopper allows you to trim up to 40 mm of travel, creating a usable working window of 85 to 125 mm. This specific 125 mm stroke length is well-suited for intermediate reach operations in tight assembly machinery.
Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable end cushions on this unit allow precise deceleration for faster cycle speeds while protecting the end covers. The cylinder body uses a riveted rolling-packed aluminum barrel with a grease-retaining piston seal, and the carbon-steel rod features 20 µm hard-chrome plating. Because this SKU lacks the -S suffix, it has no built-in magnet and cannot support a CMSG, DMSG, or EMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 85–125 mm (trim 40 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 MBLCJ25X125-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -40 | 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 MBLCJ25X125-40 Is Used
PCB Depaneling Router
Provides the 245 N push force needed to drive a depaneling blade through a 125 mm routing path, using the adjustable cushion to stop smoothly without jarring the fragile board edges.
Dispenser Valve Actuation
Trims the rear stroke by 40 mm to hit an exact 85 mm dispensing depth, while the air cushion decelerates the 206 N pull force to prevent fluid splashing at the end of cycle.
Textile Loom Tensioner
Uses the 85-125 mm adjustable window to fine-tune fabric tension dynamically, relying on the hard-chrome plated Ø10 mm rod to withstand continuous abrasive fiber contact.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-40 the Right Cylinder?
Choose this Ø25 bore when you need 245 N push (206 N pull) at 0.5 MPa. If your application requires less force, step down to the Ø20 bore, which provides 157 N of push force. For heavier payloads requiring more thrust, step up to the Ø32 bore, delivering 402 N. The MBLCJ variant is preferred over the MBLJ when moving heavier masses at higher speeds, as the tunable air cushion absorbs kinetic energy far better than a fixed bumper.
Remember that the rear stopper sets the travel end but does not hold the load, and the cushion only decelerates; neither acts as a lock. Mounting is limited to Basic, FA (flange), or LB (foot) as there is no back-cover or SDB pivot option. The overall length equals A + 2 x stroke + adjust. When replacing this unit, match the 25 mm bore, 125 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and confirm no magnet is required. At 125 mm, the Ø10 mm rod is manageable, 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 MBLCJ25X125-40 FAQ
At 0.5 MPa, this double-acting cylinder provides 245 N of push force and 206 N of pull force. At 0.7 MPa, the push force increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a speed range of 30-800 mm/s.
This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors. Additionally, the 40 mm rear adjuster is a travel stop that sets the 85-125 mm stroke window, and the air cushion handles deceleration; neither component locks or holds the load in place.
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