Airtac MICJ Adjustable Mini Cylinder MICJ40X250-40S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X250-40S is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke250 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 MICJ40X250-40S
Dial in a precise 210 to 250 mm forward stop on-site with the AirTAC MICJ40X250-40S, a round-body stainless mini cylinder built for double-acting service. An external screw trims the extend end by up to 40 mm, while a needle-set variable air cushion at both ends absorbs high-speed shock. The stainless barrel and rod resist mild corrosion and washdown, and the built-in magnet (-S) supports CMSG, DMSG, or EMSG switches.
Operating pressure spans 0.15 to 1.0 MPa, with speeds of 30-800 mm/s.
Airtac MICJ Adjustable Mini Cylinder MICJ40X250-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X250-40S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MICJ40X250-40S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MICJ40X250-40S Is Used
High-Flow Divertor Gate
Shifts a heavy routing flap at speed, using the 40 mm extend trim to hit the exact closed stop without mechanical shims, while the dual air cushions absorb the 628 N impact.
32 kg Vertical Lowering Arm
Lowers a weighted handling arm safely; the adjustable cushion decelerates the load near the bottom, and the stop screw fine-tunes the resting height within the 40 mm window.
Washdown Carton Press
Applies a 377 N safe clamping force on cartons in a damp environment, relying on the stainless construction and needle-set cushions to withstand rinse-down and soften contact.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X250-40S the Right Cylinder?
When sizing this 40 mm bore, dropping down to a 32 mm MICJ cuts the 0.5 MPa push force to 402.2 N, whereas no larger MICJ bore exists above 40 mm. Choose this 250 mm stroke model when you need a long reach combined with a settable forward position and high-speed cushioning to prevent end-of-stroke banging. The external adjuster sets the extend endpoint but is not a mid-stroke lock.
For mounting, select LB foot, FA flange, or TC trunnion brackets, plus CA, U, R, or CM back covers; note that the SDB pivot block is not offered on adjustable-stroke variants. Because the -S magnet is present, you can directly mount CMSG, DMSG, or EMSG sensors. If the application must hold a load on air loss, add an external rod lock or pilot check valve, as the piston will drift and the cushion only decelerates near the stroke end.
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 MICJ40X250-40S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external screw shortens the extend stroke by up to 40 mm (usable range 210-250 mm), while the needle-set air cushion at both ends decelerates the piston at high speed. The -S magnet enables CMSG/DMSG/EMSG sensors. The cushion only decelerates and does not lock; the piston will drift 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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