Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-10S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-10S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MFCJ40X25-10S
Trim the extend stroke by up to 10 mm on site with the AirTAC MFCJ40X25-10S, a JIS-standard round-body mini cylinder built for high-speed actuation. The riveted SUS304 stainless barrel and aluminium covers form a compact body that is physically shorter than an equivalent ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion. A needle-set variable air cushion at both ends soaks up end-of-stroke shock smoothly.
Fitted with a 1/4" port, a Ø16 mm rod, and an M14x1.5 male thread, this double-acting 40 mm bore unit delivers a push force of 628.3 N at 0.5 MPa. The -S suffix denotes a built-in piston magnet for CMSG, DMSG, or EMSG switches. For sizing, this bore yields a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-10S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-10S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MFCJ40X25-10S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MFCJ40X25-10S Is Used
High-Speed Forming Press
Uses the 628.3 N push force to stamp light components while the needle air cushion absorbs the 800 mm/s end-of-stroke impact, preventing tool damage.
Adjustable Component Seating
Dials in the exact 15-25 mm extend position during trial fits, allowing operators to shorten the stroke by up to 10 mm without changing hardware.
Washdown Diverter Gate
Leverages the SUS304 stainless barrel to resist mild moisture while shifting heavy diverters, safely moving loads around 32 kg vertically.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-10S the Right Cylinder?
When choosing between the two available bores, the 40 mm option provides a substantial step up in force over the MFCJ32, which pushes 402.2 N at 0.5 MPa. Select this MFCJ40 variant when your changeover requires both maximum push power and on-the-fly stroke tuning within a 15-25 mm extend window. The adjustable air cushion is essential for high-speed 30-800 mm/s cycles where deceleration shock could damage tooling.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code exists for this build). Because the -S magnet is present, you can directly fit reed or electronic sensors. Remember that the air cushion only decelerates the piston near stroke end; it does not lock or hold the load. If air pressure drops, the piston will drift, so add 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 MFCJ40X25-10S FAQ
This 40 mm bore cylinder features a 1/4" port and a Ø16 mm rod. It generates a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on site, yielding a usable 15-25 mm extend window. The variable air cushion at both ends decelerates the piston near stroke end to reduce high-speed shock. The -S suffix means it has a built-in magnet 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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