Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 40mm 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.
- BoreØ20 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R
Delivering 157 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact 40 mm strokes with ease. The Ø20 mm bore uses a 1/8 inch air port and an M8x1.25 male rod thread. Its stainless barrel and rod resist mild corrosion, giving it a real edge over painted steel in damp or washdown environments. The riveted construction keeps the body light, while fixed TPU bumper pads absorb the impact at stroke extremes.
Because the 157 N rating is a theoretical maximum, plan for a safe working load of about 94 N to account for friction and pressure drops. That translates to lifting roughly 8 kg vertically with a 2:1 safety margin. This specific R-type configuration features an axial-in port on the rear cover, which helps streamline tubing in tight machinery layouts.
Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R Technical Specifications
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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.
Theoretical Output Force (Ø20mm)
| 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.
Model Code: Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MI16-20 Stainless Steel Mini Cylinder MI20X40R Is Used
Stamping Pin Ejection
Uses the 40 mm stroke to push finished metal pins out of a die, relying on the 157 N push force to overcome light friction in the ejection channel.
Package Sorting Diverter
Extends rapidly to knock small cardboard cartons off a main belt into a packing chute, where the stainless body survives occasional dust and humidity.
Pallet Label Press
Cycles forward to flatten and press adhesive shipping labels against wooden pallet sides before the strapping process begins.
Is the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40R the Right Cylinder?
When sizing this actuator, compare it against its neighbours: a Ø16 bore provides 100.5 N of push at 0.5 MPa, while stepping up to a Ø25 yields 245.3 N. Choose the Ø20 to hit that 157 N sweet spot for medium-duty clamping or lifting. Note that this SKU lacks the -S magnet, so it cannot host CMSG, DMSG or EMSG reed switches; you must select an -S variant if your control system requires position sensing. You can mount it using LB foot, FA flange, SDB pivot or TC trunnion brackets.
Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered. The TPU bumpers only decelerate the piston near the stroke end; they do not function as a braking mechanism. If your application must hold a vertical load securely during an air failure, install an external pilot-operated check valve or a dedicated rod lock.
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 MI16-20 Stainless Steel Mini Cylinder MI20X40R FAQ
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 air port size is 1/8 inch.
Yes, the Ø20 bore uses the ISO 6432 mounting interface, so it drops directly into standard mini-cylinder clevises and brackets. However, because this specific SKU lacks the internal magnet, you cannot mount CMSG, DMSG or EMSG sensors on it; you would need the -S variant for position detection.
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