Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S is a genuine double acting, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 75mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke75 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S
Trimming the forward stop by up to 20 mm on-site, this double-acting round-body mini cylinder lets you dial in a 55-75 mm extend position without swapping hardware. The Ø40 mm bore uses a 1/4" port and a 16 mm stainless steel piston rod, delivering 628.3 N of push force at 0.5 MPa. An adjustable air cushion at both ends absorbs high-speed shock, while the stainless barrel and rod resist mild corrosion and washdown environments.
Because the built-in magnet (-S) is present, you can mount CMSG, DMSG, or EMSG sensors for position detection. The needle cushion only decelerates the piston near the stroke end; it does not lock the load. With a safe working load around 377 N, this actuator moves about 32 kg vertically with a 2:1 safety margin.
Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 | Variable air cushion, both ends |
| 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. Note: the Ø40 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -20 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -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 MICJ Adjustable Mini Cylinder MICJ40X75-20S Is Used
Heavy Clamping Press
Dial in the 55-75 mm extend stop to clamp 32 kg assemblies securely, relying on the adjustable air cushion to prevent impact damage at high cycling speeds.
Pallet Diverting
Use the 628.3 N push force to redirect heavy loads on a conveyor, tuning the forward position precisely without changing the physical mounting.
Carton Forming Stop
Set the exact end position for folding large packaging flaps, letting the needle cushion absorb the shock of rapid 800 mm/s movements.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X75-20S the Right Cylinder?
When sizing this actuator, compare the thrust against adjacent bores: the Ø32 mm bore provides 402.2 N of push at 0.5 MPa, while the Ø40 mm bore listed here yields 628.3 N. As the largest standard round-body mini cylinder in the series, there is no larger bore available. The external stop screw and dual adjustable cushions excel in fast set-position moves where you must tune the impact.
Mount using LB foot, FA flange, or TC trunnion brackets, noting that the SDB pivot-block is not available on this adjustable variant. Remember that the stop screw sets the end position but is not a mid-stroke lock; the piston will drift on air loss. Use an external rod lock or pilot check valve if you need to hold a suspended load.
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 MICJ Adjustable Mini Cylinder MICJ40X75-20S FAQ
This Ø40 mm bore cylinder features a 1/4" port and an M12x1.25 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum force of 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 20 mm on-site, while a needle valve adjusts the air cushion at both ends to soak up high-speed shock. The -S suffix means it has a magnet for CMSG/DMSG/EMSG sensors. The cushion only decelerates the piston; it does not lock the load, so the rod will drift on air loss.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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