Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU
The AirTAC Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 400mm 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
- Stroke400 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU
The B52-MI20X400SU delivers 157 N of push force at 0.5 MPa from its 20 mm bore, making it a solid choice for light assembly tasks. This is the copper-free (copper-prohibited) version of the MI20X400SU, built for lines where copper and copper alloys are not permitted, such as ammonia systems or certain battery and electronics plants.
Its stainless-steel barrel and rod resist mild corrosion and washdown, a real edge over painted-steel minis in damp or food-adjacent spots. The fixed TPU bumper pads soften stroke-end impact, and the built-in magnet enables CMSG, DMSG, or EMSG switches for position sensing. The 1/8" port and ISO 6432 mounting interface drop into standard mini-cylinder brackets and clevises. For real work, plan on about 94 N of safe working load at 0.5 MPa, not the full rating.
Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU Technical Specifications
| Model | Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 400 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 B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×400 | 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 B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU Is Used
Battery Assembly Stops
Use the 157 N push at 0.5 MPa to actuate a light stop or gate on a battery cell assembly line, where copper-free components are required by plant policy.
Ammonia System Valve
In an ammonia refrigeration plant, this copper-free cylinder can drive a small divert valve or damper. Its stainless build resists the corrosive environment.
Carton Tamping
Mount this 400 mm stroke cylinder to tamp or compress lightweight cartons on a packaging line. The 131.9 N pull force at 0.5 MPa retracts the rod reliably.
Is the Airtac B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU the Right Cylinder?
The B52-MI20X400SU sits between the 16 mm bore (100.5 N push) and the 25 mm bore (245.3 N push) at 0.5 MPa. If your application needs more force, step up to the 25 mm bore; if it is lighter duty, the 16 mm bore may save space and cost. This model has a 400 mm stroke, which is within the 500 mm maximum standard for this bore size.
Remember, a plain cylinder does not hold its position when air is lost or the valve is centred - the piston drifts. For a held load, use an external rod lock or a pilot-operated check valve. The U 90-degree back cover orients the rear port for tight spaces. With the -S magnet, you can add CMSG, DMSG, or EMSG switches. For long strokes like this, consider side-load and rod-bending forces in your mounting design.
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 B52-MI Copper-Free Stainless Steel Mini Cylinder B52-MI20X400SU FAQ
At 0.5 MPa, push force is 157 N and pull is 131.9 N. At 0.7 MPa, push is 219.8 N and pull is 184.7 N. The theoretical maximum force at 1.0 MPa is 32 kgf. Operating pressure range is 0.15-1.0 MPa.
B52- is AirTAC's copper-free (copper-prohibited) build of the MI20X400SU, for lines where copper alloys are not allowed. The barrel and rod are stainless steel. Please confirm the exact material substitutions with us, as that detail is not in our public datasheet.
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