Airtac MI25~40 Stainless Steel Mini Cylinder MI40X650SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X650SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 650mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke650 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 MI40X650SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty automation tasks. The Ø40 bore uses a 1/4" port and a Ø16 piston rod with an M12x1.25 male thread. Because the 650 mm stroke exceeds the 500 mm standard maximum, this specific unit is manufactured as a made-to-order item. The stainless-steel barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp or washdown environments.
Fixed TPU bumper pads absorb the impact at stroke extremes, decelerating the piston without offering adjustable cushioning. The built-in magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing, while the CM round end cover completes the rear assembly. Plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a safe 2:1 margin.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X650SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X650SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 650 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 MI40X650SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×650 | 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 MI40X650SCM Is Used
Heavy Package Diversion
Pushes heavy cartons across transfer lines using the 628.3 N thrust, with the CM rear cover allowing flexible pivot mounting on the conveyor frame.
Long-Reach Component Ejection
Utilizes the non-standard 650 mm stroke to clear large molded parts from deep press dies, where the stainless rod resists factory coolant splash.
Pallet Positioning Gate
Actuates heavy routing gates on pallet conveyors, lifting or shifting loads up to 32 kg safely while relying on the fixed TPU pads for impact absorption.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X650SCM the Right Cylinder?
When sizing this actuator, compare its 628.3 N push at 0.5 MPa against the neighboring bores: stepping down to a Ø32 yields 402.2 N, while there is no larger standard MI bore above Ø40. Keep in mind that venting air or centering the valve causes the piston to drift, as the TPU bumpers only soften the end-of-stroke impact rather than locking the load; use an external rod lock or pilot check valve for holding. The extended 650 mm travel demands careful mounting to prevent rod bending and side-load wear. Utilize LB foot, FA flange, or TC trunnion brackets, and leverage the internal magnet for CMSG/DMSG/EMSG sensors.
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 MI40X650SCM FAQ
This Ø40 bore double-acting cylinder features a 1/4" air port. 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. Note that the 650 mm stroke is a non-standard, made-to-order length exceeding the 500 mm maximum.
No, the base MI uses fixed TPU bumper pads that merely decelerate the piston at the ends, not adjustable air cushions. Furthermore, it will drift if air is lost or the valve is centered; the bumpers do not act as a brake. You must add an external rod lock or pilot check valve to hold a suspended load securely.
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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.
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Most inquiries answered within 7-8 hours.
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