Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S 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 40mm for a usable window of 0–40mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke40 mm
- Adjustable0–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S
The AirTAC MBLCJ25X40-40S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. With a 25mm bore, it delivers 245N push and 206N pull force at 0.5MPa. The 40mm adjustable stroke allows you to mechanically trim the rear travel, creating a usable end-position window from 0 to 40mm. This tunable cushioning safely decelerates heavier or faster moving loads to protect the end covers, unlike a fixed rubber bumper.
Equipped with a built-in magnet (-S), this cylinder supports AirTAC CMSG reed and DMSG/EMSG electronic sensors for precise position feedback. The riveted rolling-packed barrel and heterogeneous two-way grease-retaining piston seal maintain tight pneumatic integrity. A carbon-steel rod with 20μm hard-chrome plating provides high wear resistance. The rear stopper sets the travel end but does not lock or hold the load; external guide mechanisms are recommended to prevent side-load damage on the 10mm rod.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 0–40 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 MBLCJ25X40-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MBLCJ25X40-40S Is Used
PCB Router Z-Axis
Provides 245N push at 0.5MPa to plunge a router bit, using the 0-40mm rear adjuster to set an exact cutting depth while the air cushion softens the rapid tool descent.
Label Applicator Tamp
Deploys a label pad with 206N pull force, utilizing the tunable cushion to decelerate the 40mm stroke gently and prevent label slippage on high-speed packaging lines.
Textile Loom Takedown
Actuates a fabric take-up lever with a 343N push at 0.7MPa, relying on the DMSG electronic sensor and the adjustable stroke window to maintain consistent fabric tension.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40S the Right Cylinder?
Select this 25mm bore if you need 245N of thrust at 0.5MPa with exact end-position tuning. If your application requires less force, step down to the 20mm bore (157N push); if you need more power, step up to the 32mm bore (402N push). Choose this MBLCJ over the MBLJ when your cycle speed demands an adjustable air cushion rather than a fixed bumper, or over the MBLC when you require a rear travel stopper. The rear adjuster and cushion screw tune the stroke and deceleration, but neither acts as a load lock—rod drift occurs without live air pressure.
Mounting is limited to Basic, FA flange, or LB foot styles; SDB pivot and back-cover options are not available for this series. Overall length equals A plus twice the stroke plus the 40mm adjustment. When ordering a replacement, verify the 25mm bore, 40mm stroke, 40mm adjust code, G1/8 port, PT thread, and the -S magnet. For strokes approaching or exceeding 300mm, use an external guide to prevent rod bending.
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 MBLCJ25X40-40S FAQ
At 0.5MPa, this 25mm bore cylinder provides 245N push and 206N pull force. At 0.7MPa, the push increases to 343N. The maximum theoretical force is 50kgf at 1.0MPa.
The rear stroke adjuster mechanically limits the travel end, providing a usable 0-40mm window, but it is a stop, not a lock. The adjustable air cushion uses a screw to tune end-of-stroke deceleration to protect the covers, but it also does not hold the load. Position holding requires external mechanics.
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Standard models usually ship in 3-4 days.
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