Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30 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 MFCJ40X25-30
Trim the extend end by up to 30 mm on site with the AirTAC MFCJ40X25-30, a JIS-standard round-body mini cylinder built for high-speed tuning. It pairs a SUS304 stainless steel barrel with riveted aluminium covers, yielding a body that is physically shorter than an ISO 6432 unit of the same bore and stroke. The 1/4" port feeds a 16 mm rod, delivering 628.3 N of push force at 0.5 MPa.
A needle variable air cushion at both ends soaks up end-of-stroke shock for smooth deceleration. This 40 mm bore generates a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. Note that this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30 |
|---|---|
| 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 MFCJ40X25-30
| 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 MFCJ40X25-30 Is Used
Press Fit Tuning
Dial in the exact 0-25 mm extend position during high-speed press fits while the air cushion absorbs the final impact, protecting delicate 628.3 N assemblies.
Divertor Adjustment
Fine-tune the stroke length on the fly for product changeovers on a conveyor line, using the 30 mm window to adapt to varying package sizes without swapping cylinders.
Carton Sealing Jaws
Soften the end-of-stroke shock on rapid sealing jaws using the variable air cushion, while the 40 mm bore provides consistent push force for heavy cardboard.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X25-30 the Right Cylinder?
Choose the 40 mm bore over the 32 mm option when you need serious push force: the MFCJ40 delivers 628.3 N at 0.5 MPa compared to 402.2 N for the MFCJ32. The 30 mm adjustable window is perfect for changeovers where the exact extend position and end shock must be dialed in together. Mount using LB foot, FA flange, or TC trunnion hardware.
Remember that the air cushion only decelerates the piston near the stroke end; it does not function as a brake. If the load must be held during air loss, install an external rod lock or pilot check valve. Because this non-S SKU has no magnet, order a -S variant if you require position sensing.
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 MFCJ40X25-30 FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 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.
No, this specific SKU does not include a magnet, so CMSG, DMSG, or EMSG switches cannot be used. You must select the -S variant for position sensing. The external adjuster shortens the extend stroke by up to 30 mm, and the variable air cushion decelerates the piston but does not lock the load.
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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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