
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SCA is a genuine double acting 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.
Delivering 628.3 N of push force at 0.5 MPa, this double-acting 40 mm bore mini cylinder is built around a SUS304 stainless steel barrel with riveted aluminium covers. The JIS-standard round-body design is physically shorter than an ISO 6432 cylinder for the same 225 mm stroke, saving valuable mounting length in tight fixtures. A 1/4" port supplies air to drive the 16 mm rod at speeds between 30 and 800 mm/s.
The piston relies on a two-way oil-retaining seal for long life, while fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impacts without acting as an adjustable cushion. Because it includes the -S magnet, it supports CMSG, DMSG, and EMSG position switches. For real work at 0.5 MPa, plan for about 377 N of usable load, which equates to lifting roughly 32 kg vertically with a 2:1 safety margin.
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SCA |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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. |
| ×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.
Actuates a heavy diverter arm on a packaging line, using the 628.3 N push force to reliably shift loaded pallets onto a secondary belt.
Drives a small bearing press with the CA pivot absorbing side-play, safely decelerating the 225 mm stroke via fixed TPU pads.
Raises a 30 kg machine access gate, staying within the 32 kg vertical lift capacity while tracking position via a DMSG sensor.
When sizing this 40 mm bore, the adjacent MF32 provides 402.2 N of push at 0.5 MPa if your load is lighter, while this 40 mm bore maxes out the MF family at a theoretical 128.1 kgf at 1.0 MPa. The CA rear pivot cover is ideal for clevis mounting, and you can pair it with LB foot, FA flange, SDB pivot, or TC trunnion brackets depending on the frame. The integrated -S magnet allows direct sensor mounting.
Note that a standard double-acting cylinder drifts if air pressure drops or the valve is centred; the TPU bumpers only decelerate the stroke end and will not hold a load. To lock a vertical position, add an external rod lock or a pilot-operated check valve. At a 225 mm stroke, ensure your mounting geometry minimizes side loading to prevent rod bending.
Quick checklist
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. At 0.5 MPa it pushes with 628.3 N and pulls with 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.
The JIS round-body is shorter than an ISO 6432 cylinder for the same 225 mm stroke, saving packaging space. The SUS304 stainless barrel resists mild corrosion. The CA back cover provides a rear pivot point for clevis mounting, and the -S magnet enables CMSG, DMSG, and EMSG switches.
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