Airtac MICJ Adjustable Mini Cylinder MICJ20X40-20S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ20X40-20S is a genuine double acting, adjustable stroke + cushion 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, 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 MICJ20X40-20S
Trim the forward stop by up to 20 mm on site without swapping cylinders: the MICJ20X40-20S uses an external screw to shorten the extend end position (usable forward range 20-40 mm), while the retract stroke remains full. This double-acting, stainless-steel round-body mini cylinder pairs that on-site adjustability with a needle-set variable air cushion at both ends to soak up high-speed shock.
The Ø20 mm bore delivers 157 N of push force at 0.5 MPa, translating to a safe working load of about 94 N or a 2:1 vertical lift capacity near 8 kg. Built with a corrosion-resistant stainless barrel and rod, it drops into standard ISO 6432 mini-cylinder mounting interfaces. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG or EMSG position switches.
Airtac MICJ Adjustable Mini Cylinder MICJ20X40-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ20X40-20S |
|---|---|
| Series | MICJ ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MICJ20X40-20S
| MICJ | ISO 6432 round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MICJ20X40-20S Is Used
Sensor Probe Placement
Dial in the 20 mm extend stop to touch a test probe against a part, using the dual air cushions to prevent bounce during high-speed 157 N forward actuation.
Light Carton Flap Folding
Set a precise intermediate forward position for folding light packaging flaps, safely lifting loads around 8 kg while the stainless body resists washdown.
Component Seating Stops
Adjust the extend endpoint on the fly to seat delicate widgets without changing fixtures, relying on the 1/8" port and needle cushions to absorb end-of-stroke shock.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ20X40-20S the Right Cylinder?
When sizing, step down to the Ø16 bore for lighter 100 N push tasks, or move up to the Ø25 bore if you need 245 N to move heavier jigs. This Ø20 model hits a solid middle ground, and its adjustable extend stop plus dual air cushions excel in fast set-position moves where you must dial in the exact forward endpoint and control impact without external shock absorbers.
For mounting, use LB foot, FA flange or TC trunnion brackets (the SDB pivot block is not offered on this adjustable variant). Remember that the stop screw only sets the end position—it is not a mid-stroke lock. If the load must be held on air loss, add an external rod lock or pilot-operated check valve, as the piston will drift and the cushion only decelerates near the stroke end.
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 MICJ20X40-20S FAQ
This Ø20 mm cylinder features a 1/8" port and an M8x1.25 male rod thread. It generates 157 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, with a theoretical maximum force of 32 kgf at 1.0 MPa.
The -S suffix means a built-in piston magnet is included for CMSG, DMSG or EMSG sensors. An external screw shortens the extend stroke by up to 20 mm (retract stays full), and the needle-set air cushions at both ends decelerate the piston near stroke end—they do not lock or hold the load mid-stroke.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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