Airtac MICJ Adjustable Mini Cylinder MICJ40X300-40
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X300-40 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke300 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 MICJ40X300-40
Trim the forward stop by up to 40 mm on site with the AirTAC MICJ40X300-40, a round-body stainless-steel mini cylinder built for double-acting operation. A needle-set adjustable air cushion at both ends soaks up high-speed shock, letting you set the exact extend position and control the impact without swapping hardware.
The stainless barrel and rod resist mild corrosion and washdown, while the external screw shortens the extend end only (retract remains full). This non-magnetic SKU cannot take a sensor; choose the -S variant for CMSG, DMSG or EMSG switches.
Airtac MICJ Adjustable Mini Cylinder MICJ40X300-40 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X300-40 |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MICJ40X300-40
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 (double rod, adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-40 Is Used
Heavy Divertor Arm
Shift heavier packages on a belt line using the 1/4" port pneumatic power, trimming the forward reach on site to match varying lane widths without changing cylinders.
Pallet Stop Gate
Arrest pallets at a packing station; the adjustable air cushion decelerates the 300 mm stroke smoothly, while the external screw fine-tunes the stopping barrier position.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-40 the Right Cylinder?
Because a plain cylinder drifts on air loss, add an external rod lock or pilot-operated check valve to hold a suspended load. Mount via LB foot, FA flange or TC trunnion (SDB pivot-block is not offered on this adjustable-stroke build).
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 MICJ40X300-40 FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 40 mm, while a needle valve adjusts the air cushion at both ends to decelerate high-speed moves. The cushion is not a brake, and the cylinder will drift on air loss; use a pilot check valve to hold a load. This non-S SKU lacks a magnet for 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.
Related AirTAC MICJ Cylinders
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