Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30CM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke30 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 MI40X30CM
Generating 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles heavy-duty actuation in a compact footprint. The 40 mm bore pairs a 16 mm piston rod with a 1/4" port and a CM round rear cover for straightforward plumbing. Its riveted stainless construction resists mild corrosion and washdown better than painted alternatives. Plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin.
Fixed TPU bumper pads absorb impact energy at the stroke extremes without offering adjustable cushioning. Because this specific SKU lacks the -S magnet, it cannot host CMSG, DMSG, or EMSG reed switches—order the magnetized variant if position feedback is required.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30CM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MI40X30CM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MI40X30CM Is Used
Pneumatic Stamping Pin
Drives a short 30 mm stroke stamping pin to mark heavy steel plates, utilizing the 628.3 N push force to dent thick material reliably.
Heavy Clamping Arm
Secures thick wooden beams in an automated carpentry line, applying firm 527.8 N pull force to hold the timber during cutting operations.
Pallet Stopper Gate
Acts as a robust stop gate on a packaging conveyor, extending 30 mm to halt loaded pallets weighing up to 32 kg before they enter the wrapping station.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30CM the Right Cylinder?
This 40 mm bore sits at the top of the MI range, so there is no larger standard size available; if your task needs less force, step down to the 32 mm bore which provides 402.2 N push at 0.5 MPa. The short 30 mm stroke keeps the rod highly resistant to bending under compression, but you must account for load holding: venting the air causes the piston to drift, as the TPU pads only soften the end-of-stroke impact rather than locking the rod. Use an external pilot check valve to suspend loads safely.
Mounting options include LB foot brackets, FA flanges, SDB pivot blocks, and TC trunnions. The CM round end dictates the rear port orientation, so verify your manifold layout. For higher cycling speeds that demand end-cushion tuning, consider the MIC variable-cushion variant instead of the fixed-bumper MI.
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 MI40X30CM FAQ
The 1/4" port feeds a 40 mm bore that yields 628.3 N push and 527.8 N pull at 0.5 MPa. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this SKU lacks the internal magnet required for switches. You must select an MI40 model with the -S suffix to use CMSG, DMSG, or EMSG sensors. The CM round end and stainless riveted body remain identical, but sensing requires the magnet.
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