Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U is a genuine double acting round-body mini air cylinder with a Ø8mm bore and 125mm stroke, M5×0.8 air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ8 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM4×0.7
- 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 MI8~12 Stainless Steel Mini Cylinder MI8X125U
Delivering 25.1 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact linear motion tasks. The Ø8 mm bore uses an M5x0.8 air port and a 4 mm piston rod with an M4x0.7 male thread. Its 125 mm stroke approaches the 150 mm maximum for this bore, making it ideal for long-travel micro-actuation. The U-style back cover provides a 90-degree port and mounting orientation for tight spatial constraints.
The rolled stainless barrel and rod resist mild corrosion and washdown better than painted alternatives. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG reed switches. Plan for roughly 15 N of actual work at 0.5 MPa to ensure reliable operation, which translates to lifting about 1.3 kg vertically with a 2:1 safety margin.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 150 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G.
Theoretical Output Force (Ø8mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 25 N | 19 N |
| 0.7 MPa | 35 N | 26 N |
| Max (@1.0 MPa) | 5 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 8 | 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 MI8~12 Stainless Steel Mini Cylinder MI8X125U Is Used
Micro-Clamp Actuation
Drives small pneumatic clamps in PCB assembly fixtures, using its 25.1 N push force to secure delicate electronic components during soldering.
Lab Dispenser Valve
Actuates a precision chemical dispensing valve where the 90-degree U cover and stainless build resist mild chemical splash in laboratory environments.
Lightweight Part Ejector
Pushes lightweight plastic moulded parts out of a machining zone over the 125 mm stroke, safely moving items weighing under 1.3 kg.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X125U the Right Cylinder?
When sizing this Ø8 mm bore, dropping down is impossible as it is the smallest available MI series. Stepping up to the Ø10 mm bore increases the 0.5 MPa push force to 39.3 N if your application demands more authority. This model features a U-type back cover for 90-degree mounting, alongside standard LB foot, FA flange, SDB pivot and TC trunnion bracket options.
A 125 mm stroke on an 8 mm bore generates a long extension, so carefully manage side loading to avoid bending the 4 mm rod. The fixed TPU bumper pads decelerate the piston at the stroke ends but do not function as an adjustable air cushion. Furthermore, this cylinder will drift and cannot hold a load if air pressure is lost or the valve is centred; install an external rod lock or pilot check valve for position holding.
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 MI8~12 Stainless Steel Mini Cylinder MI8X125U FAQ
This double-acting cylinder generates 25.1 N push and 18.8 N pull at 0.5 MPa, and 35.2 N push / 26.4 N pull at 0.7 MPa. The theoretical maximum force is 5.1 kgf at 1.0 MPa. It features an M5x0.8 air port.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG or EMSG switches. You would need the -S variant for position sensing. It uses standard ISO 6432 mounting dimensions and fixed TPU bumper pads.
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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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