Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150R
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150R is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 150mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke150 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 MI40X150R
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty automation tasks. The stainless-steel barrel and piston rod resist mild corrosion, making it highly suitable for damp washdown environments where painted steel alternatives fail. A fixed TPU bumper pad absorbs the impact at each stroke end, decelerating the payload smoothly without the complexity of adjustable cushions. The R back cover features an axial-in port orientation, simplifying plumbing in tight machinery layouts.
Because this 40 mm bore lacks the -S suffix, it cannot accept CMSG, DMSG, or EMSG magnetic switches. For position feedback, you would need the -S magnet variant. With a 150 mm stroke operating at speeds between 30 and 800 mm/s, plan for a safe working load of roughly 377 N. This equates to lifting about 32 kg vertically with a 2:1 safety margin, letting you match the actuator to real part weights without guesswork.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150R Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150R |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MI40X150R
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MI40X150R Is Used
Stamping Press Feed
Pushes heavy metal blanks into a forming die using the full 628.3 N thrust available at 0.5 MPa.
Pallet Divertor
Actuates a heavy-duty routing gate on a packaging line, relying on the stainless body for washdown durability.
Vertical Clamp Press
Draws a 150 mm stroke to secure heavy wooden components during an assembly gluing process.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150R the Right Cylinder?
When sizing this 40 mm bore actuator, stepping down to the 32 mm variant reduces the 0.5 MPa push force to 402.2 N, while no larger standard MI bore exists above it. If your application requires holding a load vertically during an air loss or valve centre state, remember this plain cylinder will drift; the TPU pads only soften the stroke end rather than locking the rod. You must add an external pilot-operated check valve or a rod lock for secure positioning. The 1/4" port and M12x1.25 male rod thread are fixed by the bore size. At a 150 mm stroke, side-load forces can bend the 16 mm rod, so ensure rigid guidance and avoid purely cantilevered loads.
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 MI40X150R FAQ
This 40 mm bore cylinder features a 1/4" air port. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must select an MI40 variant with the -S suffix if your application requires magnetic position sensing.
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 MI25~40 Stainless Steel Mini Cylinder MI40X150R
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.