Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 120mm 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
- Stroke120 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 MF40X120U
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MF40X120U is a robust 40 mm bore double-acting round-body cylinder built to JIS standards. Its SUS304 stainless-steel barrel and riveted aluminium covers shrug off mild corrosion and washdown environments. Because this riveted body is physically shorter than a comparable ISO 6432 cylinder for the same 120 mm stroke, it saves valuable mounting length in tight machinery. 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 the stroke-end impact.
For real-world sizing, plan for roughly 377 N of actual work at 0.5 MPa, which safely lifts about 32 kg vertically with a 2:1 margin. This specific U-suffix configuration ships with a flat-end rear cover. Note that because this SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG position switches. Air connects via a 1/4" port, and the 16 mm rod features an M14x1.5 male thread.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 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 MF40X120U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 MF40X120U Is Used
Press Fit Subassemblies
Uses the 628.3 N push force at 0.5 MPa to seat bearings or pins into housings on an automated assembly line without requiring a full-scale hydraulic press.
Package Diverting
Employs the 120 mm stroke and flat-end U rear cover to push cartons cleanly off a main conveyor belt into a secondary packing lane.
Pallet Stopper Gate
Acts as a heavy-duty pneumatic stop for 40 mm bore applications, holding back loaded pallets on a gravity roller conveyor before release.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U the Right Cylinder?
When sizing this 40 mm bore, compare it directly against its neighbours: the 32 mm bore tops out at 402.2 N push at 0.5 MPa, while the 40 mm provides 628.3 N. Since 40 mm is the largest available MF bore, moving beyond this force class requires a different cylinder family entirely. The 120 mm stroke is well within the 500 mm standard limit, but at this length you should carefully manage side loads to prevent rod bending and premature seal wear.
Remember that a standard double-acting cylinder drifts when air is removed or the valve is centred; the TPU bumpers only decelerate the end of travel and do not function as a brake. If your application requires vertical load holding, install an external pilot-operated check valve or a dedicated rod lock. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets.
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 MF40X120U FAQ
The 40 mm bore double-acting cylinder uses a 1/4" air port and an M14x1.5 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for position sensing. It features fixed TPU bumper pads rather than an adjustable air cushion, and its JIS riveted round-body design is shorter than an ISO 6432 cylinder.
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.
Request a Quote for Airtac MF32-40 Stainless Steel Mini Cylinder MF40X120U
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.