
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X300SCM is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 300mm stroke, 1/8" 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.
Delivering 157 N of push force at 0.5 MPa, this double-acting stainless-steel mini cylinder handles mid-range automation tasks with ease. The Ø20 mm bore uses a 1/8" port and an M8x1.25 male rod thread. Its riveted round body houses a stainless barrel and rod that resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown environments.
The built-in magnet (-S) directly supports CMSG, DMSG and EMSG switches for position sensing, while the CM round end cover neatly manages rear port orientation. At 0.5 MPa you can expect a real working load of roughly 94 N, letting you lift about 8 kg vertically with a safe 2:1 margin. Fixed TPU bumper pads absorb the impact at stroke extremes without adding bulk.
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X300SCM |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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.
Pushes lightweight cartons on a packaging line using the 157 N thrust, with the CM round end cover keeping the rear port tucked neatly against the frame.
Ejects plastic sample trays from a testing machine where the stainless steel rod shrugs off occasional chemical splashes and mild moisture.
Raises small parts trays using the 300 mm stroke, safely lifting roughly 8 kg loads thanks to the double-acting piston design.
Sizing this actuator requires looking both ways: dropping to the Ø16 bore cuts the 0.5 MPa push force to 100.5 N, whereas stepping up to the Ø25 bore raises it to 245.3 N. The 300 mm stroke is well within the 500 mm maximum for this bore, though at full extension you should minimize side loading to prevent rod bending. Because the ISO 6432 mounting interface matches standard brackets, hardware integration is straightforward.
Remember that venting the air supply causes the piston to drift, as the fixed bumpers only decelerate the end of travel rather than locking the rod. To suspend a load securely during an air loss event, fit an external rod lock or a pilot-operated check valve. You can utilize LB foot, FA flange, SDB pivot, or TC trunnion mounts to suit your frame.
Quick checklist
This double-acting cylinder pushes with 157 N and pulls with 131.9 N at 0.5 MPa. At 0.7 MPa, push is 219.8 N and pull is 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa. It uses a 1/8" air port and an M8x1.25 male rod thread.
Yes, the included -S magnet allows you to mount CMSG, DMSG or EMSG switches along the body. For impact absorption, it relies on fixed TPU bumper pads that decelerate the piston at the stroke ends; it does not feature an adjustable air cushion.
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