Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 100mm for a usable window of 25–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable25–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S
The AirTAC MBLCJ25X125-100S is a compact double-acting aluminum mini cylinder featuring a rear travel stopper and an adjustable air cushion at both ends. It delivers 245 N of push force at 0.5 MPa. The 100 mm rear adjuster creates a usable stroke window of 25 to 125 mm, allowing you to fine-tune the end position without mechanical shims. A built-in magnet enables position detection.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy, protecting the end covers during faster repetitive cycles. The riveted rolling-packed barrel and 20 µm hard-chrome plated carbon-steel rod ensure durability. Note that the rear adjuster acts only as a travel stop and the cushion only decelerates; neither will mechanically lock or hold a load in place without continuous air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 25–125 mm (trim 100 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 MBLCJ25X125-100S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -100 | 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 MBLCJ25X125-100S Is Used
PCB Router Z-Axis
Provides 245 N of push force for a PCB depaneling router, using the 25-125 mm adjustable window to set precise cutting depths for different board thicknesses.
Variable Depth Pinning
Drives a pneumatic pin inserter for electronic connectors, utilizing the 100 mm rear stroke adjustment to accommodate varying pin lengths without changing tooling.
Textile Loom Takedown
Actuates a fabric takedown roller in a textile loom, where the adjustable air cushion protects the end covers from impact during high-speed 800 mm/s cycling.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-100S the Right Cylinder?
Select this 25 mm bore when you need 245 N push (206 N pull) at 0.5 MPa alongside extensive end-position tuning. If your process requires less force, step down to the 20 mm bore which provides 157 N of push force. If you need substantially more power, step up to the 32 mm bore yielding 402 N. For a direct replacement, match the 25 mm bore, 125 mm stroke, 100 mm adjust code, G1/8 port, M10x1.25 rod thread, PT thread form, and the built-in magnet (-S). Mounting is limited to Basic, FA flange, or LB foot; SDB pivot and back-cover options are not available on this series.
Because the usable stroke window is 25 to 125 mm, the rear stopper provides extreme flexibility for varying product sizes on the same fixture. The adjustable air cushion is ideal for varying payload weights, letting you dial in deceleration to prevent end-cover damage. Remember that a plain pneumatic cylinder drifts under load; if your application requires strict position holding without live air pressure, you must incorporate an external locking mechanism or guide.
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 MBLCJ25X125-100S FAQ
At 0.5 MPa, the 25 mm bore provides 245 N of push force and 206 N of pull force. At 0.7 MPa, the push force increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa. The operating pressure range is 0.15 to 1.0 MPa, with a speed range of 30-800 mm/s.
The 100 mm adjustable stroke is a rear mechanical stopper that trims the actual travel window down to 25 mm, setting the final end position. The adjustable air cushion is a separate screw-tunable valve that regulates exhaust flow to decelerate the piston near the end caps. Neither feature acts as a lock to hold a load.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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