Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 250–300mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke300 mm
- Adjustable250–300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S
The AirTAC MBLCJ25X300-50S is a compact double-acting mini cylinder featuring a 25mm bore and a 300mm stroke. It generates 245N of push force and 206N of pull force at 0.5 MPa. A rear mechanical adjuster allows you to trim up to 50mm of travel, creating a precise usable stroke window of 250 to 300mm. This rear stopper sets the end position but does not lock the load in place.
Unlike the fixed rubber bumper found on the MBLJ series, this model features a screw-tunable adjustable air cushion at both ends. This decelerates heavier or faster moves to protect the end covers, operating at speeds from 30 to 800 mm/s. The riveted aluminum barrel houses a Ø10mm carbon-steel rod with 20µm hard-chrome plating. The built-in magnet (-S) supports CMSG reed and DMSG/EMSG electronic sensors for position detection.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 250–300 mm (trim 50 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 MBLCJ25X300-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ25X300-50S Is Used
PCB Edge Router Ejection
Deploys the full 300mm stroke to push singulated circuit boards out of a routing machine, using the 50mm rear adjuster to dial in the exact hand-off height for the downstream conveyor.
Textile Loom Tensioner
Traverses yarn guides across a 250 to 300mm carriage window, relying on the dual adjustable air cushions to silently decelerate the 245N thrust at the high 800 mm/s cycle speed.
Thin-Film Web Splicing
Actuates a splicing head on a packaging line, using the integrated magnet to trigger a DMSG electronic sensor for precise rod confirmation while handling delicate polymer films.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50S the Right Cylinder?
At 0.5 MPa, this 25mm bore yields 245N push and 206N pull. If your application requires less force, stepping down to the 20mm bore provides 157N push and 132N pull. If you need more power, stepping up to the 32mm bore offers 402N push and 346N pull. Choose this MBLCJ over the MBLJ when you need tunable end-of-stroke deceleration instead of a fixed bumper, or over the MBLC when you require the rear travel adjuster.
The exact replacement match requires a 25mm bore, 300mm stroke, 50mm adjust code, G1/8 port, PT thread, and a magnet. Mounting is limited to Basic, FA flange, or LB foot styles; there is no back-cover or SDB pivot option. Because the stroke is 300mm, the small Ø10mm rod is susceptible to bending under lateral stress—always use an external guide to prevent side-loading damage. Neither the rear adjuster nor the air cushion acts as a brake to hold the load without live air pressure.
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 MBLCJ25X300-50S FAQ
At 0.5 MPa, the push force is 245N and the pull force is 206N. At 0.7 MPa, the push force is 343N. The maximum theoretical force is 50 kgf at 1.0 MPa. The 50mm adjust code allows you to mechanically trim the rear stroke, providing a usable end-position window between 250mm and 300mm.
No. The adjustable air cushion only regulates deceleration speed near the stroke ends to prevent end-cover damage, and the rear adjuster is strictly a travel stop. Neither component functions as a lock or brake. You must maintain live air pressure or use an external locking mechanism to hold a load.
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