Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S 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 75mm for a usable window of 50–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable50–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S
The AirTAC MBLCJ25X125-75S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. It delivers 245 N of push force and 206 N of pull force at 0.5 MPa. The 75 mm rear adjuster creates a usable stroke window of 50 to 125 mm, letting you dial in the exact travel distance for a specific cycle. A built-in magnet (-S) enables position detection via CMSG reed or DMSG/EMSG electronic switches.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable pneumatic cushioning to decelerate the rod near the stroke ends, absorbing kinetic energy to protect the end covers during fast 30-800 mm/s cycles. The rear adjuster functions purely as a travel stop to set the end position; it does not lock or hold the load in place. The riveted aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durable service in tight machinery spaces. Overall length extends by the 75 mm adjuster value, requiring careful spatial planning.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 50–125 mm (trim 75 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 MBLCJ25X125-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ25X125-75S Is Used
PCB Router Z-Axis
Trims the 75 mm rear stroke to set a precise 50 mm plunge depth for a spindle, using the dual air cushions to stop the 245 N thrust smoothly without shocking the router bearings.
Packaging Fold Flap
Dials in the exact cardboard folding arm extension within the 50-125 mm window, allowing the adjustable cushion to absorb the impact of the 125 mm stroke at high cycle rates.
Textile Tension Guide
Positions a fabric guide bar using the built-in magnet for DMSG sensor feedback, while the cushioning protects the end covers from the rapid reversals inherent in loom actuation.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S the Right Cylinder?
Choose this 25 mm bore if your mechanism requires 245 N push at 0.5 MPa over a variable 50-125 mm window. If your payload is lighter, step down to the 20 mm bore which yields 157 N push; if you need more thrust, step up to the 32 mm bore delivering 402 N. The MBLCJ differs from the fixed-stroke MBLC by offering the 75 mm rear travel stopper, and it upgrades the MBLJ's fixed bumper to an adjustable air cushion for heavier dynamic loads. Remember that neither the cushion needle nor the rear stopper acts as a load lock; the rod drifts without live air pressure, so external guiding is needed for side loads. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB or back-cover options). For a direct replacement, match the 25 mm bore, 125 mm stroke, 75 mm adjust code, G1/8 port, PT thread, and the -S magnet specification.
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 MBLCJ25X125-75S 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 increases to 343 N, with a maximum theoretical output of 50 kgf at 1.0 MPa. It operates at 30-800 mm/s, uses a G1/8 port, and features a Ø10 mm rod with an M10x1.25 thread.
The 75 mm rear adjuster is a mechanical travel stop that sets your usable stroke window between 50 and 125 mm; it does not lock or hold the load. The adjustable air cushion is a separate needle valve that controls end-of-stroke deceleration to prevent hard impacts, which is a major upgrade over the fixed rubber bumper found on the MBLJ series.
Authorized Export Seller
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.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
Request a Quote for Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.