Airtac MI25~40 Stainless Steel Mini Cylinder MI40X70SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X70SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 70mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke70 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 MI40X70SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles demanding actuation tasks. The Ø40 bore operates with a 1/4" port and a Ø16 piston rod, while the rear CM round end cover provides a compact mounting footprint for tight machinery layouts. Fixed TPU bumper pads absorb the impact at stroke extremes, decelerating the piston smoothly without the complexity of adjustable needle valves.
The stainless-steel barrel and rod resist mild corrosion, making it highly suitable for damp manufacturing environments or washdown zones. Because this is a non-ISO-6432 size, it functions purely as a robust round-body actuator rather than dropping into standard sub-25 mm mini-cylinder brackets. Plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe operational margin, which translates to lifting about 32 kg vertically with a 2:1 safety factor.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X70SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X70SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 MI40X70SCM
| MI | 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. |
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 MI40X70SCM Is Used
Stamping Press Feed
Pushes heavy metal blanks into a progressive die with 628.3 N of force, utilizing the CM round end cover for flush rear mounting on the press frame.
Pallet Diverter
Actuates a heavy-duty routing gate on a packaging line, relying on the stainless-steel construction to endure occasional washdowns during sanitation shifts.
Carton Stack Pusher
Ejects assembled corrugated cartons off a roller table, safely moving loads under the 377 N safe working threshold without bouncing at the stroke end.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X70SCM the Right Cylinder?
When sizing this 40 mm bore, compare its 628.3 N push force at 0.5 MPa against the smaller Ø32 bore, which provides 402.2 N under the same pressure. Since Ø40 is the largest available bore in this series, moving heavier loads requires pairing two cylinders or switching to a larger profile body. The integrated -S magnet allows direct mounting of CMSG, DMSG, or EMSG switches for position sensing, and the 70 mm stroke keeps the rod compact to minimize side-load bending. Remember that venting the air supply causes the piston to drift, as the TPU bumpers only soften the end of travel rather than locking the load; incorporate a pilot-operated check valve if you need to hold a vertical weight mid-stroke.
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 MI40X70SCM FAQ
This double-acting cylinder uses a 1/4" air port and generates a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, the piston will drift if air is lost or the valve is centered. The fixed TPU bumper pads only decelerate the rod near the stroke ends and do not act as a brake. For vertical load holding, you must install an external rod lock or a pilot-operated check valve.
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 MI40X70SCM
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.