Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S 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 10mm for a usable window of 115–125mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke125 mm
- Adjustable115–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S
The AirTAC MBLCJ25X125-10S 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 and 206 N pull force at 0.5 MPa. The rear stopper lets you trim up to 10 mm of travel, creating a usable 115-125 mm stroke window to fine-tune end positions. Unlike the base MBLJ with its fixed rubber bumper, this model uses screw-tunable deceleration to protect the end covers during faster cycling.
This SKU includes a built-in magnet (-S) for position feedback via AirTAC CMSG reed or DMSG/EMSG electronic switches. The riveted rolling-packed barrel and heterogeneous two-way grease-retaining piston seal retain lubrication for long life. It uses a Ø10 mm carbon-steel rod with 20 µm hard-chrome plating to resist scuffing. Note that the rear adjuster is a travel stop, not a load lock; the cylinder drifts without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 115–125 mm (trim 10 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 MBLCJ25X125-10S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -10 | 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 MBLCJ25X125-10S Is Used
PCB Router Z-Axis
Governs a 125 mm plunge on a PCB depaneling router, using the 10 mm stroke trim to dial in the exact cutting depth and the air cushion to soften the rapid retract.
Dispenser Valve Actuation
Drives a metering valve for two-part epoxy, relying on the 245 N push force to open sticky seats while the CMSG reed switch confirms the open stroke.
Carton Flap Folder
Folds corrugated carton flaps on a packaging line, using the adjustable 115-125 mm window to accommodate varying box heights without changing the cylinder.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X125-10S the Right Cylinder?
Choose this 25 mm bore when you need 245 N push force at 0.5 MPa. If your payload is lighter, step down to the 20 mm bore (157 N push); for heavier drives, step up to the 32 mm bore (402 N push). The MBLCJ is preferred over the MBLJ when shock absorption is critical, and over the MBLC when you need that cushioning alongside a variable end position. Remember, neither the air cushion nor the 10 mm rear adjuster acts as a brake or lock to hold a load statically. Mounting is limited to Basic, FA flange, or LB foot styles; SDB pivot or back-cover options are not available on this chassis. For a direct replacement, match the 25 mm bore, 125 mm stroke, 10 mm adjust code, G1/8 PT port, and the -S magnet. Because the stroke is 125 mm on a Ø10 mm rod, use an external guide to prevent rod bending and premature seal wear.
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 MBLCJ25X125-10S 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 physically limits the rod extension to a 115-125 mm window, setting the end position. The adjustable air cushion uses a needle screw to tune how fast the piston decelerates near the cover. Neither holds the load statically; you need live air or an external lock to prevent drift.
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