Airtac MICJ Adjustable Mini Cylinder MICJ40X300-50
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X300-50 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 MICJ40X300-50
Dial in the forward stop on site without swapping hardware using the AirTAC MICJ40X300-50. This round-body stainless-steel mini cylinder shortens the extend stroke by up to 50 mm via an external screw, while a needle-set adjustable air cushion at both ends soaks up high-speed shock. The barrel and piston rod resist mild corrosion and washdown environments, making it a robust choice for demanding automation.
Driven by a 16 mm piston rod and a 1/4" port, the double-acting design moves loads rapidly across its 300 mm stroke at 30-800 mm/s. The extend adjuster sets the end position but is not a mid-stroke lock. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors without upgrading to the -S variant.
Airtac MICJ Adjustable Mini Cylinder MICJ40X300-50 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X300-50 |
|---|---|
| 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 MICJ40X300-50
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MICJ40X300-50 Is Used
Pallet Stopping
Halt 30 kg loaded pallets on a belt line; the dual adjustable air cushions absorb the 800 mm/s impact shock smoothly at the end of the 300 mm stroke.
Vertical Lift Gates
Raise and lower access gates on packaging machinery, relying on the stainless construction for washdown resistance and the external screw to set the open height.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-50 the Right Cylinder?
When sizing this 40 mm bore model, consider the adjacent options in the MICJ family. The adjustable 50 mm extend window plus dual air cushions are perfect for fast, settable-position moves where you must tune the forward stop and control impact deceleration. Mounting options include LB foot, FA flange, and TC trunnion, but the SDB pivot-block is not available on this adjustable-stroke variant. Because this SKU has no magnet, it cannot support position sensing; choose the -S variant if you require CMSG, DMSG, or EMSG switches. Remember that the air cushion only decelerates the piston near the stroke end—it does not hold the load. If air pressure drops, the piston will drift, so add an external rod lock or pilot check valve for suspended loads.
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 MICJ40X300-50 FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod.
An external screw shortens the extend stroke by up to 50 mm, letting you set the forward end position on site. Needle valves adjust the air cushion at both ends to decelerate the piston at high speeds. The cushion only slows the rod near the end of travel; it is not a brake. This SKU also lacks a magnet, so it cannot take sensors unless you specify the -S variant.
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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