Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø32mm bore and 20mm 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.
- BoreØ32 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
- 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 MF32-40 Stainless Steel Mini Cylinder MF32X20U
Delivering 402.2 N of push force at 0.5 MPa, this double-acting 32 mm bore mini cylinder is built around a SUS304 stainless barrel with riveted aluminium covers. The riveted rolling-packed structure shrinks the overall footprint, making the body physically shorter than a comparable ISO 6432 unit for the same 20 mm stroke. A heterogeneous two-way seal on the piston retains an oil film for long service life, while fixed TPU pads at both ends soften the impact at stroke extremes.
With a 1/4" port and an M10x1.25 male rod thread, the unit is tailored for compact ejection tasks. Because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG reed switches. For practical sizing, expect a safe working load of roughly 241 N, which translates to lifting about 20.5 kg vertically with a 2:1 safety margin.
Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M10×1.25 |
| 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.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 32 | Bore size in mm. |
| ×20 | 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 MF32-40 Stainless Steel Mini Cylinder MF32X20U Is Used
Short-Stroke Part Ejector
Uses the 20 mm stroke to rapidly kick machined aluminium parts out of a CNC fixture, leveraging the 402.2 N push force to overcome initial friction.
Carton Flap Tucker
Folds corrugated cardboard flaps prior to sealing on a packaging line, where the compact U flat-end rear cover allows tight side-by-side mounting.
Press-Fit Pin Insertion
Presses small dowel pins into cast housings on an assembly dial table, taking advantage of the 241 N safe working load to seat components without overshooting.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF32X20U the Right Cylinder?
When sizing this 32 mm bore, stepping down to the MF25 drops the 0.5 MPa push force to 245.3 N, whereas moving up to the MF40 increases it to 628.3 N. The integrated U flat-end back cover provides a flush rear mounting face, which pairs well with FA flanges or LB foot brackets when you need a rigid stationary mount rather than a pivot.
Keep in mind that a standard double-acting cylinder will drift if air pressure drops or the valve is centred; the TPU bumpers only decelerate the piston near the stroke end and do not function as a braking lock. If your fixture must hold a load vertically during an emergency stop, install an external pilot-operated check valve or a dedicated rod lock.
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 MF32-40 Stainless Steel Mini Cylinder MF32X20U FAQ
At 0.5 MPa it provides 402.2 N push and 345.6 N pull. At 0.7 MPa it provides 563 N push and 483.8 N pull. The theoretical maximum force is 82 kgf at 1.0 MPa. The air port size is 1/4 inch.
No, this specific SKU does not include the -S magnet, so CMSG, DMSG, or EMSG switches cannot be used. You would need the -S variant for position sensing. The unit features a SUS304 stainless body that is shorter than an ISO 6432 cylinder, and it uses fixed TPU bumper pads rather than an adjustable air cushion.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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