Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X400-50 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting, double rod, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MICJ40X400-50
Dial in a precise forward stop without swapping hardware using the AirTAC MICJ40X400-50. An external screw trims the extend end position by up to 50 mm on site, yielding a usable forward range of 350-400 mm, while a needle-set variable air cushion at both ends soaks up high-speed shock. As a double-acting, round-body stainless steel mini cylinder, the Ø40 mm bore pushes 628.3 N and pulls 527.8 N at 0.5 MPa.
The stainless barrel and rod resist mild corrosion and washdown environments. Operating pressure spans 0.15-1.0 MPa, speed reaches 30-800 mm/s, and the 1/4" port feeds the 16 mm rod. This non-magnetic SKU cannot take a sensor; adding the -S variant enables CMSG/DMSG/EMSG switches.
Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50 |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
MIJ / MICJ are double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -50 | 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 (double rod, adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50 Is Used
Heavy Part Ejection
Push heavy machined parts out of a CNC enclosure, tuning the 50 mm extend stop to clear the door and relying on the air cushion to absorb the 32 kg load impact at speed.
Pallet Stopping
Halt 30 kg pallets arriving at 400 mm/s on a transfer line; the adjustable needle cushion decelerates the load smoothly without slamming the rear cover.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X400-50 the Right Cylinder?
The adjustable stop plus cushion shines in fast set-position moves where you must tune the forward impact. Remember, the stop screw sets the end position but is not a mid-stroke lock, and the cushion only decelerates. The piston drifts on air loss, so specify an external rod lock or pilot check valve for held loads. Mount via LB foot, FA flange, or TC trunnion (SDB pivot-block is unavailable here).
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 MICJ40X400-50 FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical max force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a 16 mm piston rod with an M12x1.25 male thread.
An external screw shortens the extend stroke by up to 50 mm, giving a usable 350-400 mm forward range; retract remains full. A needle valve adjusts the air cushion at both ends to decelerate high-speed moves. This SKU lacks a magnet for sensors, and the cylinder drifts on air loss, so use an external rod lock for holding.
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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