Airtac MICJ Adjustable Mini Cylinder MICJ40X300-75
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X300-75 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 MICJ40X300-75
Dial in a precise forward stop without swapping cylinders using the AirTAC MICJ40X300-75. This round-body stainless steel mini cylinder features an external screw that shortens the extend stroke by up to 75 mm on site, giving a usable forward range of 225 to 300 mm. A needle-adjustable air cushion at both ends soaks up high-speed shock, letting you set the position and control the impact simultaneously. The retract stroke remains full length.
Built with a riveted stainless barrel and a Ø16 mm piston rod, it resists mild corrosion and handles washdown environments. It operates at speeds from 30 to 800 mm/s, uses a 1/4" port, and features an M12x1.25 male rod thread. Note this non-magnetic SKU cannot accept position sensors; adding the -S variant enables CMSG, DMSG, or EMSG switches.
Airtac MICJ Adjustable Mini Cylinder MICJ40X300-75 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X300-75 |
|---|---|
| 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 MICJ40X300-75
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -75 | 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 MICJ40X300-75 Is Used
Heavy Carton Diversion
Pushes heavy cartons at high speed on a packaging line, using the 75 mm extend adjustment to dial in the exact push distance while the dual air cushions absorb end-of-stroke impact.
Vertical Press Tooling
Lowers a 32 kg tooling head smoothly, relying on the adjustable extend screw to set the precise lower end position and the needle cushion to prevent slamming.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-75 the Right Cylinder?
As the largest available MICJ bore, there is no larger standard size to step up to. The adjustable stop screw and dual air cushions are ideal for fast, settable-position moves, but remember the cylinder does not hold position on air loss—the piston drifts if pressure drops. For a suspended load, install an external rod lock or pilot check valve.
Mounting options include LB foot, FA flange, and TC trunnion, plus CA, U, R, or CM back covers. The SDB pivot block is not available on this adjustable-stroke variant. Because this SKU lacks the -S magnet, it cannot support magnetic sensing.
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 MICJ40X300-75 FAQ
This Ø40 mm cylinder uses a 1/4" port. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 75 mm, setting the forward end position without affecting the full retract. A needle valve adjusts the air cushion at both ends to decelerate the piston at high speed. This cushion only reduces impact near stroke end; it is not a brake. The cylinder does not hold position on air loss, and this non-S SKU cannot accept magnetic 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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