Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 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 MFCJ40X225-40
Dial in your extend end-point on site with the AirTAC MFCJ40X225-40, a JIS-standard round-body mini cylinder built from a SUS304 stainless barrel and riveted aluminium covers. This double-acting actuator features a 40 mm adjustable stroke window (yielding a usable 185-225 mm extend) and a needle-set variable air cushion at both ends to absorb high-speed shock. It runs on a 1/4 inch port with a 16 mm rod.
Delivering 628.3 N of push force at 0.5 MPa (879.6 N at 0.7 MPa), this 40 mm bore unit is shorter than an ISO 6432 cylinder for the same stroke, saving valuable machine length. The SUS304 construction resists mild washdown corrosion. As a computed sizing guide, expect a safe working load of about 377 N (roughly 60 percent of the 0.5 MPa push force), which lifts about 32 kg vertically with a 2:1 safety margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 MFCJ40X225-40
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MFCJ40X225-40 Is Used
High-Speed Tool Clamping
Tune the 185-225 mm extend position during changeovers and use the variable air cushion to softly seat heavy machining fixtures without shock, leveraging the 628.3 N push force.
Package Diverting
Adjust the stroke by up to 40 mm on site to hit varying package sizes perfectly, while the needle cushion absorbs the 879.6 N high-speed impact at the extend end.
Pallet Stopper Arms
Handle heavier pallets with the 40 mm bore's 527.8 N pull force, dialing the stop arm position precisely and relying on the air cushion to decelerate the load smoothly.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40 the Right Cylinder?
When sizing between the two available bores, the MFCJ40 provides 628.3 N push at 0.5 MPa compared to the MFCJ32 at 402.2 N. Choose this 40 mm bore when moving heavier fixtures, and rely on the 40 mm adjustable window for trial fits where the exact extend position is unknown until commissioning. The variable air cushion is essential for high-speed changeovers, letting you tune the end-of-stroke deceleration to prevent harsh impacts. Mount using LB foot, FA flange, or TC trunnion hardware (SDB is not supported). Remember that the cushion only decelerates the piston; it does not lock the load. If gravity or air loss could cause drift, install an external rod lock or pilot check valve. For position feedback, select the -S magnet variant instead of this base model.
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 MFCJ40X225-40 FAQ
This 40 mm bore cylinder uses a 1/4 inch port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa, with an operating speed of 30-800 mm/s.
An external adjuster shortens the extend stroke by up to 40 mm (usable range 185-225 mm), while the variable air cushion at both ends decelerates the piston near the end of travel to reduce shock. This specific SKU does not have the -S magnet, so it cannot accept 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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