Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 275mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke275 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MI25~40 Stainless Steel Mini Cylinder MI40X275CM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty actuation with a 275 mm stroke. The stainless-steel barrel and Ø16 mm piston rod shrug off mild corrosion, making it highly reliable in damp or washdown-prone environments compared to painted alternatives. A 1/4" port supplies air to the CM round-end rear cover, while fixed TPU bumper pads absorb the impact at stroke extremes without offering adjustable cushioning.
Plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting about 32 kg vertically. Because this SKU lacks a magnet, it cannot accept CMSG, DMSG or EMSG sensors; you would need the -S variant for position detection. The riveted construction remains compact despite the high 128.1 kgf theoretical maximum force available at 1.0 MPa.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G. Note: the Ø40 bore is a larger, non-ISO-6432 size.
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 MI25~40 Stainless Steel Mini Cylinder MI40X275CM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MI-family variants: MI / MIC (double acting ±cushion), MSI / MTI (single acting push / pull), MID / MICD (double rod ±cushion), MIJ / MICJ (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM Is Used
Stamping Press Feed
Pushes metal blanks into a progressive die with 628.3 N of force, utilizing the 275 mm stroke to clear the press bed safely.
Heavy Package Diverter
Diverts dense cartons on a logistics line, where the stainless build survives occasional washdowns and the fixed TPU pads absorb transit impacts.
Pallet Component Pusher
Ejects assembled industrial parts from a palletizing station, lifting up to 32 kg safely while handling the 275 mm transfer distance.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM the Right Cylinder?
When sizing this 40 mm bore, compare its 628.3 N push force at 0.5 MPa against the 402.2 N supplied by the smaller Ø32 model, noting that Ø40 is the largest available MI size. If your payload requires holding position during air loss or valve centering, remember that a plain cylinder drifts and the TPU bumpers only decelerate the end of travel rather than acting as a brake. You must fit an external rod lock or a pilot-operated check valve for secure load holding. The CM round-end back cover suits specific rear mounting orientations, and the 275 mm stroke necessitates checking for side-load forces to prevent rod bending.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/R/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/R/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X275CM FAQ
This 40 mm bore cylinder features a 1/4" air port and an M12x1.25 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 and cannot accept CMSG, DMSG or EMSG switches. You must select the -S magnet variant for position sensing. It is a non-ISO-6432 round-body mini cylinder with fixed TPU bumper pads, not adjustable air cushions.
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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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