Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 25mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 5–25mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke25 mm
- Adjustable5–25 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20
The AirTAC MBLCJ25X25-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The rear stopper trims up to 20 mm of travel, creating a usable stroke window of 5 to 25 mm. Driven by a Ø10 mm carbon-steel rod with 20 µm hard-chrome plating, it delivers 245 N of push force and 206 N of pull force at 0.5 MPa. This specific 25 mm stroke length is ideal for short-travel sequencing in tight assembly machine spaces.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushioning to decelerate the piston near each end cover, absorbing impact energy for faster cycling speeds. The riveted rolling-packed aluminum barrel and heterogeneous two-way grease-retaining piston seal ensure consistent friction. Note that this specific SKU lacks the -S magnet option, meaning it cannot support CMSG, DMSG, or EMSG position sensing. The rear adjuster sets the travel end position but does not mechanically lock or hold the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 25 mm |
| Adjustable window | 5–25 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 MBLCJ25X25-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×25 | 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 MBLCJ25X25-20 Is Used
PCB Router Gates
Actuating routing gates on a printed circuit board conveyor, where the 245 N push force at 0.5 MPa securely moves lightweight diverters and the tuned cushion prevents end-cover impact during 800 mm/s rapid cycling.
Dispenser Valve Dosing
Modulating a shot-valve plunger for adhesive application, using the 5 to 25 mm usable stroke window to fine-tune the exact dispense height without reprogramming the machine controller.
Small-Part Ejection
Pushing molded plastic parts out of a sub-assembly fixture, where the 206 N pull force safely retracts the 10 mm rod and the adjustable air cushion halts the rod without bouncing the delicate component.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X25-20 the Right Cylinder?
When sizing this 25 mm bore cylinder, stepping down to a 20 mm bore reduces the output to 157 N push at 0.5 MPa, suitable for lighter micro-assembly tasks. Stepping up to a 32 mm bore increases the force to 402 N push at 0.5 MPa, necessary if your mechanism overcomes heavier spring resistance. Choose the MBLCJ over the MBLJ when your cycle speed demands end-cover protection that a fixed bumper cannot provide, or choose the MBLC if you require a fixed standard stroke without the rear adjuster. Remember that the adjustable stroke screw is a travel stop, not a lock; the cylinder cannot hold position without continuous air pressure. Mounting is limited to Basic, FA flange, or LB foot brackets (no SDB pivot or back-cover options exist). For an exact replacement, match the 25 mm bore, 25 mm stroke, 20 mm adjust code, G1/8 PT port, and no-magnet configuration.
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 MBLCJ25X25-20 FAQ
At 0.5 MPa, this 25 mm bore cylinder provides 245 N push and 206 N pull force. At 0.7 MPa, the push force increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
The rear stroke adjuster is a mechanical travel stop that limits the piston's end position within the 5 to 25 mm window. The adjustable air cushion is a screw-tunable valve that regulates exhaust air flow to decelerate the piston near the end covers. Neither feature locks or holds the load; the rod will drift without live air pressure.
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