Airtac MI25~40 Stainless Steel Mini Cylinder MI40X15SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X15SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 15mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke15 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 MI40X15SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty short-stroke tasks. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it highly suitable for damp washdown environments where painted bodies fail. A 15 mm stroke provides abrupt, precise actuation, while the 1/4" port feeds the large bore rapidly.
For practical sizing, expect a safe working load of roughly 377 N, which translates to lifting about 32 kg vertically with a 2:1 safety margin. The riveted construction keeps the unit compact, and fixed TPU bumper pads absorb the shock at the stroke ends. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG or EMSG position switches.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X15SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X15SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MI40X15SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MI40X15SCM Is Used
Short-Stroke Stamping
Ideal for driving compact marking presses or crimping tools where the 15 mm travel delivers a fast, high-impact 628.3 N strike at 0.5 MPa.
Heavy Diverter Gate
Provides the robust pushing power needed to pivot heavy product guides on packaging lines, with the stainless build surviving daily washdowns.
Pallet Stopper Block
Acts as a solid 15 mm stop pin for low-profile pallets, using its 32 kg safe vertical lift capacity to halt goods without bouncing.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X15SCM the Right Cylinder?
As the largest bore in the MI family, the Ø40 sits at the top of the range with no larger standard size available; if 628.3 N at 0.5 MPa is excessive, step down to the Ø32 which yields 402.2 N. The CM round end cover dictates the rear mounting orientation, pairing with LB foot, FA flange, SDB pivot or TC trunnion brackets. Keep in mind that venting air or centering the valve will cause the piston to drift, as the TPU bumpers only decelerate the end of travel without locking the load—install a pilot check valve or external rod lock if you need to hold position. Despite the short 15 mm travel, ensure the rod thread M12x1.25 is axially aligned to prevent side-loading and premature seal wear.
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 MI40X15SCM FAQ
This double-acting cylinder uses a 1/4" port and generates 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, the base MI features fixed TPU bumper pads that only decelerate the stroke end, not an adjustable air cushion (which requires the MIC variant). Additionally, it cannot hold a load if air is lost; you must add an external rod lock or pilot check valve to prevent drift.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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