
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X280R is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 280mm 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 round-body mini cylinder handles a 280 mm stroke with ease. The riveted barrel and piston rod resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. Fixed TPU bumper pads absorb the impact at stroke extremes, decelerating the motion without the complexity of adjustable cushioning.
Because it lacks the -S suffix, this specific SKU cannot host CMSG, DMSG or EMSG magnetic switches. The 1/8" port and M8x1.25 male rod thread are set by the 20 mm bore. For practical sizing, plan for roughly 94 N of real work at 0.5 MPa, which means it can comfortably lift an 8 kg part vertically using a 2:1 safety margin.
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X280R |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 280 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. |
| ×280 | 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 a routing flap on a packaging line, using the 280 mm stroke to clear standard totes while the stainless body shrugs off humid ambient conditions.
Applies a steady 94 N working force to seat small bearings or clips into housings, relying on the fixed TPU pads to soften the end of stroke.
Extends to press an adhesive label onto pallet loads, where the axial-in R cover keeps the 1/8 inch air line safely tucked away from the moving mechanism.
When sizing this 20 mm bore, stepping down to the 16 mm version drops the push force to 100.5 N, while moving up to the 25 mm bore increases it to 245.3 N at 0.5 MPa. The rear R cover provides an axial-in port orientation, which helps when routing tubing straight out the back. If your machine requires position feedback, you must select the -S magnet variant instead, as this base model cannot accept a sensor.
At 280 mm, the stroke is well within the 500 mm maximum but still requires careful guidance to prevent rod bending under side loads. Remember that venting the air or centering the valve causes the piston to drift, as the TPU bumpers only soften the end of travel rather than locking the load. Add an external pilot check valve if you need to hold a vertical weight in place during a pressure drop.
Quick checklist
This 20 mm bore cylinder uses a 1/8" port. At 0.5 MPa it provides 157 N push and 131.9 N pull. At 0.7 MPa it provides 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa.
The Ø20 bore uses the ISO 6432 mounting interface, so it drops directly into standard mini-cylinder foot, flange or trunnion brackets. However, because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG magnetic switches.
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