Airtac MI25~40 Stainless Steel Mini Cylinder MI40X500R
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X500R is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 500mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke500 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 MI40X500R
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty automation tasks with ease. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it superior to painted alternatives in damp or washdown environments. It features a 1/4" port and a convenient R axial-in rear cover for streamlined plumbing.
Plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting about 32 kg vertically. Fixed TPU bumper pads absorb the impact at the stroke ends, though they decelerate rather than act as an adjustable cushion. Because this specific SKU lacks the -S magnet, it cannot host CMSG, DMSG or EMSG sensors.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X500R Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X500R |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 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 MI40X500R
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 MI40X500R Is Used
Heavy Package Diversion
Pushes heavy cartons off a main conveyor line using the 628.3 N push force available at 0.5 MPa.
Pallet Gate Actuation
Extends 500 mm to open large safety gates around automated palletising cells in damp environments.
Stamping Press Feed
Drives a metal blank feeder forward into a press, relying on the stainless construction for shop-floor durability.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X500R the Right Cylinder?
When sizing this 40 mm bore, dropping down to a Ø32 bore reduces the push force to 402.2 N at 0.5 MPa, while no larger MI series exists above it. If your application requires position holding, remember that venting the air causes the piston to drift; the bumpers only soften the end-of-stroke impact and will not lock the rod, so an external pilot check valve is necessary for suspended loads.
The 500 mm stroke demands careful alignment to prevent rod bending under side loads. You can mount this unit using LB foot brackets, FA flanges, SDB pivot blocks or TC trunnions. For high-speed cycles that generate more kinetic energy, consider the MIC variant which offers true adjustable air cushioning instead of fixed pads.
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 MI40X500R FAQ
This 40 mm bore cylinder features 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, this specific SKU does not include a magnet. You must purchase the -S variant to use CMSG, DMSG or EMSG switches. Additionally, the fixed TPU bumpers only decelerate the stroke end and do not function as an adjustable air cushion.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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