Airtac MICJ Adjustable Mini Cylinder MICJ20X40-40S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ20X40-40S 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 MICJ20X40-40S
Dial in a precise forward stop on-site with the AirTAC MICJ20X40-40S, a stainless-steel round-body mini cylinder that lets you shorten the extend stroke by up to 40 mm via an external screw. Driven by a 1/8" port and an Ø8 rod, this double-acting actuator delivers 157 N of push force at 0.5 MPa, translating to a safe working load of roughly 94 N or a vertical lift of about 8 kg with a 2:1 margin.
Beyond setting the end position, a needle-adjustable air cushion at both ends soaks up high-speed shock to protect your tooling. The built-in magnet (-S) supports CMSG, DMSG, and EMSG sensors for position feedback, while the stainless barrel and rod resist mild corrosion in washdown environments. It conforms to the ISO 6432 mounting interface for straightforward bracket interchangeability.
Airtac MICJ Adjustable Mini Cylinder MICJ20X40-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ20X40-40S |
|---|---|
| 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 MICJ20X40-40S
| MICJ | ISO 6432 round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MICJ20X40-40S Is Used
Adjustable Forming Stop
Tune the 40 mm extend stop to press light sheet metal components precisely, relying on the dual air cushions to absorb the 157 N impact at high cycling speeds.
Variable Length Flap Folder
Dial in the forward stroke on the fly to fold different carton sizes, lifting roughly 8 kg of vertical load safely while the needle cushion prevents end-of-stroke slamming.
Washdown Divert Gate
Leverage the stainless steel construction and ISO 6432 mounting to actuate a routing gate in damp environments, using the -S magnet to confirm gate position.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ20X40-40S the Right Cylinder?
When sizing this 20 mm bore, stepping down is not an option for retaining an air cushion, as the smaller Ø16 is the minimum cushioned size, but the true smaller alternative is the MIJ bumper-only series. If you need more force, the Ø25 bore provides 245 N of push at 0.5 MPa. The 40 mm extend adjuster is ideal for fast, settable-position moves where you need to tune the forward stop without swapping hardware. For vertical loads, remember this cylinder will drift on air loss; the stop screw and air cushion only decelerate near the end of travel, so add an external rod lock or pilot check valve to hold position. Mount using LB, FA, or TC brackets (the SDB pivot block is not offered here), and ensure your SKU has the -S suffix if you plan to use CMSG/DMSG/EMSG switches.
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 MICJ20X40-40S FAQ
This 20 mm bore cylinder uses 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 of 32 kgf at 1.0 MPa.
An external stop screw shortens the extend end position by up to 40 mm without affecting the full retract stroke, while a needle valve adjusts the air cushion at both ends to decelerate the piston before impact. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors.
Authorized Export Seller
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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