Airtac MIJ Adjustable Cylinder MIJ40X400-40S
The AirTAC MIJ Adjustable Cylinder MIJ40X400-40S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM12×1.25
- CushionFixed TPU bumper pads
- 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 MIJ Adjustable Cylinder MIJ40X400-40S
Dial in a precise forward end position on-site with the AirTAC MIJ40X400-40S, a round-body stainless-steel mini cylinder featuring a 40 mm adjustable extend window. An external stop screw lets you shorten the forward stroke from its 400 mm nominal length down to 360 mm, absorbing setup tolerances without changing the part number. The retract stroke remains full length. Built with a riveted stainless barrel and a Ø16 mm piston rod, it handles washdown and mild corrosion reliably.
This double-acting Ø40 bore delivers substantial power, pushing 628.3 N and pulling 527.8 N at 0.5 MPa. It uses a 1/4" port and a male M12x1.25 rod thread. Because this is a larger bore, it is a non-ISO-6432 round-body unit. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG position sensing.
Airtac MIJ Adjustable Cylinder MIJ40X400-40S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X400-40S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| 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 | Fixed TPU bumper pads |
| 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 MIJ Adjustable Cylinder MIJ40X400-40S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 MIJ Adjustable Cylinder MIJ40X400-40S Is Used
Heavy Diverter Gate
Position heavy sorting flaps on a packaging line, using the 40 mm stroke adjustment to dial in the exact open stop for different carton widths without swapping hardware.
Pallet Stopper Arm
Halt inbound pallets on a roller conveyor; the stainless build resists damp environments while the stop screw fine-tunes the blocking distance for mixed load sizes.
Is the Airtac MIJ Adjustable Cylinder MIJ40X400-40S the Right Cylinder?
When sizing this actuator, check both directions: stepping down to a Ø32 bore drops the 0.5 MPa push force to 402.2 N, while this Ø40 provides 628.3 N. There is no larger standard MIJ bore. The 40 mm external adjuster is ideal for changeover jobs where you need one SKU to cover several staged feed distances. Remember that the stop screw only trims the extend end; it is not a mid-stroke lock. The cylinder will drift on air loss, so add an external rod lock or pilot check valve for held loads.
Mounting options include LB foot, FA flange, and TC trunnion brackets, plus CA, U, R, and CM back covers. The SDB pivot block is not available on this adjustable variant. Fixed TPU bumper pads decelerate the stroke ends across the 30-800 mm/s speed range, operating safely from 0.15 to 1.0 MPa.
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 MIJ Adjustable Cylinder MIJ40X400-40S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a male M12x1.25 rod thread.
The external stop screw shortens the extend stroke by up to 40 mm on-site, yielding a usable forward range of 360-400 mm, while retract remains full. The -S suffix means a magnet is built in for CMSG, DMSG, or EMSG sensors. The screw sets the end position only and does not lock the load mid-stroke.
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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.
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Most inquiries answered within 7-8 hours.
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