Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB is a genuine double acting round-body mini air cylinder with a Ø12mm bore and 40mm 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.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM6×1.0
- CushionFixed TPU bumper pads
About the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB
Delivering 56.5 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact actuation with ease. The Ø12 mm bore uses an M5x0.8 air port and a Ø6 mm piston rod with an M6x1.0 male thread. Because the piston carries a magnet (-S), you can track its position directly with CMSG, DMSG or EMSG switches.
The rolled stainless barrel shrugs off mild corrosion, giving it an edge over painted alternatives in damp workcells. Its ISO 6432 mounting interface drops straight into standard mini-cylinder brackets and clevises. Plan for about 34 N of actual work at 0.5 MPa, which means it lifts roughly 2.9 kg vertically with a safe 2:1 margin. Fixed TPU bumper pads absorb the stroke-end impact without adding bulk.
Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø12 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 250 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 MI12X40SCALB
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 12 | 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 MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB Is Used
Electronic Component Sorting
Pushes small PCBs or connectors along a conveyor with a safe 34 N working load, using the built-in magnet for precise end-of-stroke confirmation.
Pouch Sealing Clamp
Actuates a lightweight sealing jaw in a packaging line, where the stainless barrel resists humidity and washdown better than painted steel.
Small Parts Ejector
Ejects machined plastic parts from a fixture, lifting up to 2.9 kg vertically while the LB foot mount keeps the body stable during rapid cycles.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SCALB the Right Cylinder?
When sizing this 12 mm bore, the smaller Ø8 MI offers 25.1 N of push, while the larger Ø16 jumps to 100.5 N at 0.5 MPa. This model includes an LB foot bracket for base mounting and a CA rear clevis for pivot applications. If your mechanism relies on the CA clevis, remember that a standard cylinder drifts when air is removed or a valve centers; the TPU bumpers only decelerate the stroke end and will not lock the load. For suspended loads, add an external rod lock or a pilot-operated check valve.
The 40 mm stroke is well within the 250 mm maximum for this bore, keeping rod bending stress minimal. If your cycle speed approaches the 30-800 mm/s range limit and impacts become harsh, consider the MIC variant for adjustable air cushioning instead of these fixed bumpers.
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 MI12X40SCALB FAQ
This 12 mm bore cylinder features an M5x0.8 port. It generates 56.5 N push and 42.4 N pull at 0.5 MPa, increasing to 79.1 N push and 59.4 N pull at 0.7 MPa. The theoretical maximum force is 11.5 kgf at 1.0 MPa.
No, the piston will drift if air pressure drops or the valve is centered. The fixed TPU bumper pads only decelerate the stroke end and do not act as a brake. You must use an external rod lock or pilot check valve to hold a load safely.
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