Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40 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 MBLCJ25X40-40
The AirTAC MBLCJ25X40-40 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 245 N push and 206 N pull force at 0.5 MPa via a Ø10 carbon-steel rod with 20 µm hard-chrome plating. The 40 mm adjustment code lets you trim the full travel, creating a usable stroke window of 0 to 40 mm for exact end-position tuning.
This model uses a G1/8 port and M10x1.25 rod-end thread. The riveted rolling-packed barrel and heterogeneous two-way grease-retaining piston seal ensure stable friction. The adjustable air cushion allows screw-tuned deceleration to protect the end covers during faster moves, outperforming the fixed bumper on a standard MBLJ. Note this SKU lacks a built-in magnet, so no CMSG or DMSG sensor can be fitted.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40 |
|---|---|
| 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 MBLCJ25X40-40
| 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 MBLCJ25X40-40 Is Used
PCB Edge-Routing Trimmer
Dials the 0-40 mm stroke window to exactly press and sever router bits on automated PCB depaneling routers, using the 245 N push force without overshooting the cut.
Dispenser Valve Tapper
Tunes the air cushion for soft contact when opening a pneumatic adhesive dispenser valve, preventing fluid shear while maintaining a rapid 30-800 mm/s cycle rate.
Wire-Cut Feeder Stop
Acts as a precise mechanical stop for a wire-cutting machine feed mechanism, where the 206 N pull force retracts the guide and the rear adjuster sets the exact cut length.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-40 the Right Cylinder?
Choose this 25 mm bore if you need 245 N push at 0.5 MPa. For lighter pick-and-place tasks, step down to the 20 mm bore (157 N push); for heavier rigging, step up to the 32 mm bore (402 N push). The MBLCJ excels over the MBLJ because its tunable air cushion manages end-of-stroke shock, whereas the MBLJ relies on a fixed rubber bumper. The MBLC variant offers the same cushion but with a fixed non-adjustable stroke.
Remember the rear stroke adjuster sets the travel end (0-40 mm window here) but is a stop, not a lock; it will not hold a load without live air pressure. Mounting is limited to Basic, FA (flange), or LB (foot) brackets—no SDB pivot or back-cover option exists. Overall length equals A + 2 x stroke + adjust. For a drop-in replacement, match bore 25, stroke 40, adjust 40, G1/8 port, PT thread, and no magnet.
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 MBLCJ25X40-40 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 reaches 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The rear adjustable stroke is a mechanical travel stop that lets you trim the usable window down to 0-40 mm; it does not lock or hold the load. The adjustable air cushion is a separate screw-tunable valve that decelerates the piston near the end caps to absorb shock. Neither feature holds position without live air pressure.
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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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