Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 210–250mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke250 mm
- Adjustable210–250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40
The AirTAC MBLCJ25X250-40 is a compact double-acting mini cylinder featuring a Ø10 mm carbon-steel rod and a riveted aluminum barrel. It combines a rear adjustable stroke stopper with a screw-tunable air cushion at both ends. You can trim up to 40 mm of travel at the rear, creating a usable end-position window of 210 to 250 mm. Delivering 245 N of push force at 0.5 MPa, it suits medium-duty handling over long distances.
This model lacks the -S magnet option, so it cannot accept a CMSG reed or DMSG electronic sensor for position detection. The adjustable cushion allows you to tune end-of-stroke deceleration for faster moves without slamming the end covers, unlike the fixed rubber bumper found on the MBLJ series. The two-way grease-retaining piston seal and 20 um hard-chrome plating ensure smooth operation at speeds up to 800 mm/s. Keep in mind the rear adjuster is a travel stop, not a lock; it sets the end point but cannot hold a load in place without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 210–250 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 MBLCJ25X250-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MBLCJ25X250-40 Is Used
Packaging Conveyor Diverter
Pushes cartons at 245 N force over the 250 mm travel, using the 40 mm rear adjuster to fine-tune the pusher end position to match varying box widths.
Textile Loom Tensioner
Moves the guide bar smoothly with the adjustable air cushion preventing yarn snags during high-speed 800 mm/s shifts, tuned to stop precisely in the 210-250 mm window.
Print Head Positioning
Shifts the print head across a narrow platen; the riveted aluminum body fits tight spaces while the cushion screw dials in soft deceleration to protect the print alignment.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-40 the Right Cylinder?
Stepping down to the 20 mm bore drops the output to 157 N push at 0.5 MPa, while moving up to the 32 mm bore increases it to 402 N. Choose this 25 mm bore when your application requires exactly 245 N of push force and a 250 mm stroke. The MBLCJ differs from the MBLC by offering the rear stroke adjuster, and from the MBLJ by replacing the fixed bumper with a tunable air cushion for heavier loads.
Because the stroke is 250 mm on a small Ø10 mm rod, side loads will cause bending; always use an external guide rail to prevent rod damage. Mounting is limited to Basic, FA flange, or LB foot brackets—SDB pivot or back-cover options are not available. For a direct replacement, match the 25 mm bore, 250 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and no magnet. The adjuster and cushion tune travel and deceleration, but neither acts as a mechanical brake to hold a load.
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 MBLCJ25X250-40 FAQ
At 0.5 MPa, the push force is 245 N and the pull force is 206 N. At 0.7 MPa, the push force is 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors. The 40 mm rear adjuster is a travel stop that sets the end position from 210 to 250 mm; it does not lock the load. The adjustable air cushion only decelerates the piston near the stroke ends.
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