Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30S 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 MFCJ40X25-30S
Dial in exact extend lengths and tame high-speed shocks with the AirTAC MFCJ40X25-30S, a JIS-standard round-body mini cylinder. The external adjuster shortens the extend stroke by up to a 30 mm window on-site, while the needle-set variable air cushion at both ends soaks up end-of-stroke impact. Built with a SUS304 stainless barrel and riveted aluminium covers, it is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length while resisting mild washdown.
Driven by a 40 mm bore and a 1/4" port, this double-acting unit delivers a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. This translates to a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG switches, enabling precise position detection in changeover setups.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30S |
|---|---|
| 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 MFCJ40X25-30S
| 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 MFCJ40X25-30S Is Used
High-Speed Forming Press
Handles a 32 kg vertical lift load while the variable air cushion absorbs the 879.6 N peak impact at 0.7 MPa during rapid metal stamping ejection.
Package Divert Arm
Uses the 30 mm on-site extend adjuster to fine-tune the push stroke for varying box sizes without remounting the cylinder.
Pallet Stopper Gate
Employs the SUS304 stainless barrel to resist washdown in logistics hubs, while the -S magnet confirms the gate position via DMSG switches.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30S the Right Cylinder?
When sizing between the two available bores, the MFCJ40 provides 628.3 N of push force at 0.5 MPa, stepping up from the 402.2 N offered by the MFCJ32 for heavier tooling. Choose this 40 mm variant when your high-speed changeovers require both a tuned 30 mm extend adjustment and active shock absorption. The variable air cushion only decelerates the piston near the stroke end; it does not lock or hold the load. If gravity or air loss causes drift, add an external rod lock or pilot check valve. For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB is unavailable), and rely on the -S magnet for electronic or reed sensor feedback.
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 MFCJ40X25-30S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm piston rod with an M14x1.5 male thread. 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 30 mm for trial fits or changeovers, but it is not a mid-stroke lock. The variable air cushion at both ends is needle-set to decelerate the piston smoothly at speeds up to 800 mm/s. The -S suffix means it includes a piston magnet for CMSG, DMSG, or EMSG sensors.
Authorized Export Seller
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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