
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X30CA is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 30mm 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.
Delivering 628.3 N of push force at 0.5 MPa, this 40 mm bore double-acting actuator handles heavy-duty clamping in tight spaces. The JIS-standard round body is physically shorter than a comparable ISO 6432 cylinder, saving valuable mounting length without sacrificing the 879.6 N peak thrust available at 0.7 MPa. A CA pivot back cover equips this specific unit for articulated rod-end loading.
Built with a SUS304 stainless-steel barrel and riveted aluminium covers, the structure naturally resists mild corrosion and washdown environments. Internal fixed TPU bumper pads soften end-of-stroke impacts, while the two-way piston seal retains an oil film for extended mechanical life. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position switches.
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X30CA |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Acting type | Double acting |
| 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 | Fixed TPU bumper pads |
| 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.
| 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.
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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.
Uses the short 30 mm stroke to knock stamped metal parts out of a die quickly, leveraging the 628.3 N push force to overcome material friction.
Swings a guide rail via the CA pivot back cover to redirect loaded pallets weighing up to 32 kg on a packaging line without stalling.
Extends a heavy steel locking pin into a conveyor gate mechanism, relying on the 879.6 N thrust at 0.7 MPa to secure the pathway under vibration.
When sizing this 40 mm bore, plan for about 377 N of real work at 0.5 MPa, which safely accounts for friction and dynamic loads. For vertical lifting, this translates to lifting roughly 32 kg with a 2:1 safety margin. If your application requires less force, step down to the MF32 which provides 402.2 N at 0.5 MPa; as 40 mm is the largest available MF bore, exceeding 628.3 N requires ganging two cylinders or changing series.
Note that a standard MF cylinder will drift and drop its load if air pressure is lost or the valve is centred, as the fixed bumpers only decelerate the stroke end and act as neither a lock nor a brake. To suspend a vertical load safely, integrate an external pilot-operated check valve or a dedicated rod lock. The 1/4" port and M14x1.5 male rod thread match the heavy 40 mm class, and the CA rear pivot is ideal for clevis mounting.
Quick checklist
The 40 mm bore uses a 1/4" port and a 16 mm rod with an M14x1.5 thread. At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a piston magnet, so CMSG, DMSG, or EMSG switches cannot be used. You must select the -S variant (e.g. MF40X30CA-S) to enable magnetic sensing. The unit features a CA pivot back cover and fixed TPU bumper pads that decelerate the stroke end but do not provide adjustable cushioning.
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