Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 40mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ25 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X40-10S. This JIS-standard round-body mini cylinder features a 10 mm external adjuster that shortens the extend stroke on site, paired with needle-set variable air cushions at both ends for smooth deceleration.
Built with a SUS304 stainless barrel and riveted aluminium covers, the body is intentionally shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting space. The 25 mm bore uses a 1/8" port and generates 245.3 N push force at 0.5 MPa, yielding a safe working load around 147 N. The built-in magnet (-S) supports CMSG, DMSG and EMSG sensors for position feedback.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| 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 | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S Is Used
Component Seating Jigs
Fine-tune the 10 mm extend window during trial assembly to seat delicate electronic components without overshooting, relying on the 245.3 N thrust for consistent placement.
Light Transfer Diverters
Absorb high-speed actuation shock at belt ends using the variable air cushion while the 12.5 kg vertical lift capacity handles lightweight product routing safely.
Carton Flap Folders
Adjust the extend stroke on the fly for varying box sizes and let the needle cushion soften the end stop, preventing dents in packaging materials.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S the Right Cylinder?
When sizing this series, compare the real thrust: the 25 mm bore delivers 245.3 N push at 0.5 MPa, sitting neatly between the MFCJ20 at 157 N and the MFCJ32 at 402.2 N. Choose the 25 mm bore when you need roughly 147 N of safe working load or to lift about 12.5 kg vertically with a 2:1 margin. The 10 mm adjustable window and twin air cushions excel in high-speed changeovers where trial fits require precise end-position tuning and shock absorption.
Mounting options include LB foot, FA flange and TC trunnion (no SDB). Because this SKU includes the -S magnet, you can fit CMSG, DMSG or EMSG switches directly. Remember that the cushion only decelerates the piston near stroke end; it does not hold the load. If air pressure drops, the piston will drift, so fit an external rod lock or pilot check valve for suspended loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-10S FAQ
This 25 mm bore cylinder features a 1/8" port and a 10 mm male rod thread (M10x1.25). It delivers 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum force of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on site, giving a usable extend range of 30-40 mm. The variable air cushion at both ends uses a needle valve to decelerate the piston near stroke end for quiet, high-speed motion. The -S suffix means a magnet is built in for CMSG, DMSG or EMSG sensors.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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