Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S is a genuine double acting, adjustable stroke + cushion round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S
Dial in a precise forward stop on-site with the AirTAC MICJ20X250-40S, a stainless-steel round-body mini cylinder that shortens the extend stroke by up to 40 mm via an external screw. Usable extension ranges from 210 to 250 mm, while retract remains full. An adjustable air cushion at both ends soaks up high-speed shock, letting you set the position and control the impact simultaneously. The 1/8" port and M8x1.25 male rod thread drop right into standard ISO 6432 mini-cylinder mounting interfaces.
Built with a riveted stainless barrel and rod for mild corrosion and washdown resistance, this double-acting bore delivers 157 N of push force at 0.5 MPa. The built-in piston magnet (-S) supports CMSG, DMSG, and EMSG position switches. For sizing context, its safe working load is roughly 94 N, meaning it can vertically lift about 8 kg with a 2:1 safety margin.
Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S |
|---|---|
| Series | MICJ ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | 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.
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 MICJ Adjustable Mini Cylinder MICJ20X250-40S
| MICJ | ISO 6432 round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -40 | 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 MICJ20X250-40S Is Used
Sorter Diverter
Tunes the 210-250 mm extend stop to deflect light packages precisely on a moving belt, using the dual cushions to absorb the 8 kg load impact.
Carton Flap Folder
Adjusts the forward position on-site to match varying box heights, relying on the 157 N push force to fold flaps smoothly at high cycle speeds.
Light Part Ejector
Leverages the 40 mm extend adjustment to dial in the exact ejection distance for small parts, while the stainless body resists mist in a wet machining area.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ20X250-40S the Right Cylinder?
When sizing this 20 mm bore, step down to a 16 mm variant if your load is under 100 N, or step up to a 25 mm bore (245 N push @0.5 MPa) if you need to overcome higher friction. The 40 mm extend adjuster is ideal for fast set-position moves where you need to tune the forward endpoint without swapping cylinders. Mount using LB foot, FA flange, or TC trunnion brackets (SDB pivot-block is not available on this adjustable variant). Add CMSG, DMSG, or EMSG sensors directly, as the -S magnet is already included.
Remember that the stop screw sets the end position but does not function as a mid-stroke lock. The air cushion only decelerates the piston near the stroke end. If your application must hold a load on air loss, install an external rod lock or pilot-operated check valve.
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 MICJ20X250-40S FAQ
This 20 mm bore cylinder has a 1/8" port and delivers 157 N push / 131.9 N pull at 0.5 MPa, and 219.8 N push / 184.7 N pull at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 40 mm (usable range 210-250 mm), while the needle-set air cushion at both ends decelerates the piston at high speed. The -S suffix means a magnet is built in for CMSG/DMSG/EMSG sensors. The stop screw is not a mid-stroke lock, and the cylinder will drift on air loss—use an external rod lock for holding.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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