Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 280–300mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke300 mm
- Adjustable280–300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20
The AirTAC MBLCJ25X300-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. With a 25mm bore, it delivers 245N push and 206N pull at 0.5 MPa. The 20mm rear adjuster creates a usable end-position window of 280 to 300mm, letting you dial in the exact travel limit without mechanical shims.
Unlike the fixed rubber bumper on an MBLJ, this SKU uses screw-tunable end-of-stroke deceleration to absorb kinetic energy, protecting the end covers during fast 300mm traverses. Because this specific configuration lacks the -S magnet suffix, it cannot accept a CMSG reed or DMSG electronic sensor for position detection. The riveted rolling-packed barrel and 20µm hard-chrome plated carbon-steel rod ensure reliable sealing, while the G1/8 port matches the bore's flow requirements.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 280–300 mm (trim 20 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 MBLCJ25X300-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ25X300-20 Is Used
PCB Edge Conveyor Trimming
Uses the 280-300mm adjustable window to fine-tune the exact hand-off position of circuit boards between assembly modules, relying on the 245N force to push carriers smoothly.
Dispenser Head Positioning
Tunes the end-of-stroke cushion to gently stop a fast 300mm traverse, preventing fluid splashing or syringe damage at the end of a glue dispensing cycle.
Textile Yarn Guide
Pivots a yarn guide across a 300mm path, using the adjustable rear stopper to limit the cross-feed width precisely without needing custom machined spacers.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20 the Right Cylinder?
Choose this 25mm bore when you need 245N of thrust at 0.5 MPa over a long 300mm span. If your task requires less force, step down to the 20mm bore (157N push), or step up to the 32mm bore (402N push) for heavier payloads. This model is specified with a PT tapered port thread, a 20mm adjuster code, and no built-in magnet. To replace it exactly, match the 25mm bore, 300mm stroke, 20mm adjust, PT thread, and Basic mounting style (FA flange or LB foot are also available, but SDB pivot and back-cover options are not supported on the MBLCJ series).
At a 300mm stroke, the 10mm piston rod is highly susceptible to side-loading and buckling; always use an external guide rail to support the load. Remember that the rear adjuster is a travel stop, not a load-holding lock, and the air cushion only decelerates the piston without braking the payload mechanically.
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 MBLCJ25X300-20 FAQ
At 0.5 MPa, this 25mm bore cylinder provides 245N of push force and 206N of pull force. At 0.7 MPa, the push force increases to 343N. The maximum theoretical force is 50 kgf at the 1.0 MPa operating pressure limit.
This specific SKU lacks the -S suffix, meaning it has no built-in magnet and cannot accept CMSG or DMSG position sensors. The adjustable air cushion is a screw-tunable valve at each end cover that traps exhaust air to decelerate the piston; it is not a mechanical lock and will not hold the load in place without constant air pressure.
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