Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S 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 50mm for a usable window of 75–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable75–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S
The AirTAC MBLCJ25X125-50S 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 at 0.5 MPa via a Ø10 mm hard-chrome plated carbon-steel rod. The 50 mm rear trimmer creates a usable end-position window of 75 to 125 mm, ideal for fine-tuning the exact extension distance on a 125 mm stroke. An integrated magnet (-S) enables position feedback.
This model uses a riveted rolling-packed aluminum barrel and a heterogeneous two-way grease-retaining piston seal for prolonged lubrication. The screw-tunable end cushions absorb kinetic energy to protect the end covers, which is critical for faster cycling speeds. The rear stopper sets the travel end but does not lock the load; external guidance is recommended for this 125 mm stroke to prevent rod side-load bending.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 75–125 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 MBLCJ25X125-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | 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 MBLCJ25X125-50S Is Used
PCB Depaneling Saw
Uses the 75-125 mm adjustable window to set the exact cutting blade penetration depth on an inline router saw, while the air cushion decelerates the 245 N push to prevent chipping the board edge.
Textile Tension Guide
Trims the fabric guide roller stroke within the 75-125 mm range on a loom, relying on the cushioned end-stop to absorb the 206 N pull force without snapping delicate yarn.
Lid Press Alignment
Dialing in the final 2 mm of a container lid press using the rear stopper, ensuring a 245 N seal crimp without over-traveling and crushing the plastic hinge.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-50S the Right Cylinder?
Stepping down to the 20 mm bore drops the output to 157 N push at 0.5 MPa, whereas stepping up to the 32 mm bore increases it to 402 N. Choose this 25 mm bore when your application requires 245 N push and 206 N pull forces. The MBLCJ variant is preferred over the MBLJ when you need tunable end-of-stroke deceleration rather than a fixed rubber bumper, and over the MBLC when you need a rear travel stopper. Remember, the adjuster is a mechanical stop and the cushion only decelerates; neither holds position without live air. Mounting is limited to Basic, FA, or LB; no SDB or back-cover options exist. Replacement parts must match bore 25, stroke 125, adjust 50, G1/8 port, PT thread, and the -S 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 MBLCJ25X125-50S 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 increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The 50 mm adjustable stroke is a mechanical rear stopper that sets your usable travel window (75-125 mm). The adjustable air cushion is a screw-tunable valve that controls deceleration at the stroke ends. Neither holds the load in place without continuous air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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