Airtac MF32-40 Stainless Steel Mini Cylinder MF40X70SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X70SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM14×1.5
- 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 MF40X70SU
Delivering 628.3 N of push force at 0.5 MPa, this 40 mm bore double-acting actuator handles heavy-duty positioning in tight spaces. Its JIS-standard round body is physically shorter than a comparable ISO 6432 cylinder for the same 70 mm stroke, giving you a tangible packaging advantage. The SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdown environments.
The internal piston relies on a two-way oil-retaining seal to maintain lubrication for long service life, while fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impacts. Because this SKU includes the -S magnet, it supports CMSG, DMSG and EMSG sensors for position detection. Plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin. The unit features a 1/4 inch port, an M14x1.5 male rod thread, and a U flat-end back cover.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X70SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X70SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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.
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 MF32-40 Stainless Steel Mini Cylinder MF40X70SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 MF40X70SU Is Used
Stamping Press Ejection
Uses the 628.3 N push force to knock stamped metal blanks out of a die reliably before the press opens.
Heavy Package Diverting
Pushes dense cartons across a transfer lane using the U flat-end back cover for stable rear mounting.
Pallet Stopper Gate
Acts as a high-force pneumatic stop for loaded pallets, safely halting movement via fixed TPU bumper pads.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X70SU the Right Cylinder?
When sizing this 40 mm bore unit, consider the neighbouring MF32 which provides 402.2 N of push force at 0.5 MPa if your payload is lighter. Since 40 mm is the largest standard MF bore, exceeding this capacity requires moving to a different cylinder family. The integrated -S magnet allows direct mounting of CMSG, DMSG or EMSG switches without external hardware.
Remember 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 act as neither a brake nor a lock. If your application requires vertical position holding, install an external rod lock or a pilot-operated check valve. For this 70 mm stroke, side-load and rod-bending stresses remain minimal, but always ensure rigid alignment to prevent premature seal wear.
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 MF40X70SU FAQ
This 40 mm bore cylinder features a 1/4 inch port and an M14x1.5 male rod thread. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push force is 879.6 N and the pull force is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The JIS-standard round body is shorter than an ISO 6432 cylinder for the same 40 mm bore and 70 mm stroke, saving valuable machine length. It uses a SUS304 stainless barrel with riveted aluminium covers. The U flat-end back cover provides a flush rear mounting surface, and the included -S magnet enables CMSG, DMSG and EMSG sensor switches.
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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.
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Most inquiries answered within 7-8 hours.
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