Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S 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 30mm for a usable window of 95–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable95–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S
The AirTAC MBLCJ25X125-30S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 245 N push force at 0.5 MPa via a Ø10 mm rod. The rear stopper allows you to trim up to 30 mm of travel, creating a precise usable stroke window of 95 to 125 mm for exact end-positioning.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air deceleration to smooth out heavier end-of-stroke impacts, protecting the aluminum end covers. The riveted rolling-packed barrel and heterogeneous grease-retaining piston seal minimize friction, while the carbon-steel rod features 20 µm hard-chrome plating for wear resistance. The built-in magnet (-S) supports CMSG reed and DMSG or EMSG electronic sensors for position feedback.
When sizing this actuator, stepping down to a 20 mm bore drops the output to 157 N push, while stepping up to a 32 mm bore raises it to 402 N. Choose this MBLCJ over the MBLJ when your cycle speed demands tunable deceleration rather than a static bumper, or over the MBLC when you need that end-position flexibility. Remember the rear adjuster is strictly a mechanical travel stop, not a lock; it cannot hold a load in place without live air pressure. Mounting is limited to Basic, FA, or LB styles, as SDB pivot and back-cover options are unavailable. For an exact replacement, match the 25 mm bore, 125 mm stroke, 30 mm adjust code, G1/8 PT port, and the -S magnet specification.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 95–125 mm (trim 30 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 MBLCJ25X125-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ25X125-30S Is Used
PCB Routing Spindle
Deploys a high-speed routing head on a PCB depaneling machine. The 245 N push handles Z-axis plunging, while the 95-125 mm stroke window dials in the exact cutting depth limit.
Textile Tensioner Arm
Actuates a tensioner arm on a weaving loom. The adjustable air cushion prevents sudden jerks on the 125 mm extension, protecting delicate yarn threads from snapping.
Bottle Diverter Gate
Powers a diverter gate on a beverage filling line. The tunable rear stopper sets the gate opening width, and the DMSG electronic sensor tracks the full extension for timing.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-30S the Right Cylinder?
When sizing this actuator, stepping down to a 20 mm bore drops the output to 157 N push, while stepping up to a 32 mm bore raises it to 402 N. Choose this MBLCJ over the MBLJ when your cycle speed demands tunable deceleration rather than a static bumper, or over the MBLC when you need that end-position flexibility. Remember the rear adjuster is strictly a mechanical travel stop, not a lock; it cannot hold a load in place without live air pressure. Mounting is limited to Basic, FA, or LB styles, as SDB pivot and back-cover options are unavailable. For an exact replacement, match the 25 mm bore, 125 mm stroke, 30 mm adjust code, G1/8 PT port, 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 MBLCJ25X125-30S 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 rear adjustable stroke is a mechanical travel stop that sets your end position within a 95-125 mm window, but it does not lock or hold the load. The adjustable air cushion is a separate needle valve that tunes end-of-stroke deceleration to protect the end covers from impact.
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