Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X300-20 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 MICJ40X300-20
Shave up to 20 mm off the forward end position on site with the AirTAC MICJ40X300-20, a stainless-steel round-body mini cylinder built for double-acting service. A needle-set variable air cushion at both ends soaks up high-speed shock, letting you dial in the exact impact deceleration while the external stop screw sets the extend stop between 280 and 300 mm.
This non-ISO-6432 unit relies on a riveted stainless barrel and Ø16 mm rod to resist mild corrosion and washdown environments. It runs on a 1/4" port with an M12x1.25 male rod thread, operating between 0.15 and 1.0 MPa at speeds of 30-800 mm/s. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG sensors; specify the -S variant if you need position feedback.
Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20 |
|---|---|
| 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 MICJ40X300-20
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -20 | 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 MICJ40X300-20 Is Used
Pallet Stopper Gate
Halt advancing pallets at a precise 290 mm forward position, relying on the stainless construction for humid warehouse environments and the cushions to prevent endcap slamming.
Vertical Form Press
Press lightweight lids at 0.5 MPa with a safe 377 N working load, adjusting the extend stroke down 15 mm to accommodate varying container heights without retooling.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20 the Right Cylinder?
When sizing this 40 mm bore, dropping down to the Ø32 mm MICJ cuts the 0.5 MPa push force to 402.2 N, while no larger round-body option exists in this series for heavier loads. The 20 mm extend adjuster shines in fast set-position moves where you need precise forward placement without swapping cylinders, paired with the dual-end cushions to tame the kinetic energy of those high-speed strokes.
Keep in mind the stop screw and air cushions only decelerate near the stroke end—they do not function as a mid-stroke lock or brake. If your load must hold position on air loss, add an external rod lock or pilot-operated check valve. For mounting, use LB foot, FA flange or TC trunnion brackets, as the SDB pivot-block is not offered on this adjustable variant.
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 MICJ40X300-20 FAQ
It uses a 1/4" air port and an M12x1.25 male rod thread.
An external screw shortens the extend stroke by up to 20 mm (usable range 280-300 mm), while needle valves adjust the variable air cushion at both ends to decelerate high-speed impacts. The cylinder does not hold position on air loss and the cushion is not a brake; use an external rod lock for holding. This non-magnet SKU cannot take sensors, but the -S variant supports CMSG/DMSG/EMSG switches.
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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