Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 10–40mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke40 mm
- Adjustable10–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30
The AirTAC MBLCJ25X40-30 is a compact double-acting mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 245 N of push force at 0.5 MPa. The rear stopper trims up to 30 mm of travel, yielding a usable stroke window of 10 to 40 mm. This makes it highly effective for applications requiring exact end-position tuning rather than relying on fixed stops.
Unlike the fixed rubber bumper found on an MBLJ, the adjustable air cushion uses screw-tunable deceleration to protect the end covers during faster or heavier moves. The riveted aluminum barrel and 20 um hard-chrome plated carbon-steel rod ensure durability. This specific SKU lacks a built-in magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors. The adjuster acts strictly as a travel stop, not a load lock, so external guides are needed for side-load stability.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 10–40 mm (trim 30 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 MBLCJ25X40-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×40 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ25X40-30 Is Used
PCB Staging Diverter
Provides 245 N of push force to actuate a pneumatic diverter arm on a PCB conveyor line, using the 10-40 mm adjustable window to perfectly time board handoff without crashing the stopper.
Label Applicator Press
Tunes the end-of-stroke deceleration via the air cushion to gently press a label onto thin-walled plastic bottles, preventing denting while maintaining a rapid 30-800 mm/s cycle speed.
Small Parts Ejector
Trims the rear stroke by 30 mm to eject small machined aluminum parts from a CNC fixture, using the exact 10 mm short-stroke window to save cycle time and avoid hitting the machine guard.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30 the Right Cylinder?
Stepping down to the Ø20 bore reduces push force to 157 N at 0.5 MPa, whereas moving up to the Ø32 bore increases it to 402 N. Choose this Ø25 model when you need 245 N of push force paired with fine 10-40 mm stroke adjustment. The tunable cushioning makes it superior to the MBLJ for managing kinetic energy, while the MBLC offers fixed-stroke simplicity if rear adjustment is unnecessary. Because this is a PT-threaded model without a magnet (-S), replacements must match the G1/8 port, M10x1.25 rod thread, 40 mm nominal stroke, 30 mm adjust code, and Basic/FA/LB mounting. Remember that neither the cushion nor the rear stopper holds a load in place without live air pressure; a separate locking device is required for position holding.
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 MBLCJ25X40-30 FAQ
This double-acting cylinder generates 245 N of push force and 206 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa operating pressure.
This specific SKU lacks a built-in magnet, so it cannot support CMSG, DMSG, or EMSG position sensors. The rear adjuster is a travel stop that sets the 10-40 mm end position; it does not lock the load. The adjustable air cushion only tunes end-of-stroke deceleration, so a separate external lock is required for position holding.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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