Airtac MI25~40 Stainless Steel Mini Cylinder MI40X125SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X125SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke125 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 MI40X125SCM
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 rod resist mild corrosion, making it suitable for damp or washdown environments where painted steel fails. It features a 1/4 inch port and a CM round end cover. Fixed TPU bumper pads absorb stroke-end impact, and the integrated magnet supports CMSG, DMSG and EMSG switches.
For practical sizing, plan for a safe working load of about 377 N, which is roughly 60 percent of the 0.5 MPa push rating. In vertical lift setups, this translates to lifting about 32 kg safely with a two-to-one margin. The riveted construction keeps the body compact while providing a robust 125 mm stroke.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X125SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X125SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MI40X125SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MI40X125SCM Is Used
Heavy Package Diversion
Pushes heavy cartons on a packaging line using its 628.3 N push force, with the stainless build surviving humid warehouse conditions.
Washdown Gate Actuation
Operates a routing gate in a food processing plant, where the stainless rod and barrel resist mild corrosion from daily washdowns.
Pallet Component Press
Delivers a safe working load of 377 N to seat bearings into pallet fixtures, utilizing the 125 mm stroke for deep reach.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X125SCM the Right Cylinder?
When sizing this 40 mm bore, dropping down to the Ø32 model reduces the 0.5 MPa push force to 402.2 N, while no larger AirTAC MI bore exists above this. If your application loses air pressure or the valve is centred, the piston will drift, as the TPU pads only decelerate the stroke end rather than locking the load. You should add an external rod lock or pilot-operated check valve for secure position holding.
This SKU includes the S magnet for CMSG, DMSG or EMSG sensors. The CM round end cover dictates the rear mounting orientation. For a 125 mm stroke, ensure your mounting arrangement prevents excessive side loading to avoid 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 MI40X125SCM FAQ
This 40 mm bore cylinder has a 1/4 inch port and a 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, the piston will drift if air is lost or the valve is centred. The fixed TPU bumper pads only decelerate the stroke end and do not act as a brake. For vertical loads, install an external rod lock or pilot check valve. The included magnet works with CMSG, DMSG and EMSG switches.
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.
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