Airtac MIJ Adjustable Cylinder MIJ40X400-50S
The AirTAC MIJ Adjustable Cylinder MIJ40X400-50S 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 MIJ40X400-50S
Dial in a precise forward end position on-site with the AirTAC MIJ40X400-50S, a round-body stainless mini cylinder featuring a 50 mm extend-trimming adjustment window. Because the external stop screw shortens the forward stroke from its 400 mm nominal maximum down to 350 mm, one part number covers several intermediate stops without swapping hardware. The retract stroke remains full length.
It uses a 1/4" port and a Ø16 rod with an M12x1.25 male thread. As a non-ISO-6432 size, it functions as a robust large mini cylinder. The included -S magnet enables position sensing with CMSG, DMSG, or EMSG switches, while fixed TPU bumper pads absorb end-of-stroke impacts.
Airtac MIJ Adjustable Cylinder MIJ40X400-50S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X400-50S |
|---|---|
| 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 MIJ40X400-50S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 MIJ Adjustable Cylinder MIJ40X400-50S Is Used
Pallet Diversion
Pushes loaded pallets weighing up to 32 kg off a main line, adjusting the extend position on-site to match varying pallet widths without changing cylinders.
Multi-Size Stacking
Acts as a stacking ram in packaging zones, trimming the forward stroke by up to 50 mm to create staggered stacks for product changeovers.
Is the Airtac MIJ Adjustable Cylinder MIJ40X400-50S the Right Cylinder?
When sizing this actuator, compare it against adjacent bores: stepping down to a Ø32 MIJ 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, making this the top choice for peak thrust within the series. The 50 mm adjustment screw is invaluable for taking up mechanical tolerances during setup or accommodating multiple part lengths in a changeover job. Remember that the stop screw merely sets the end position; it is not a mid-stroke lock. If your load must be held during air loss, install an external rod lock or pilot check valve, as the piston will drift.
Mounting options include LB foot, FA flange, and TC trunnion brackets, along with CA, U, R, or CM back covers. The SDB pivot block is not available on this adjustable-stroke variant. For sensing, the -S magnet in this SKU supports CMSG, DMSG, and EMSG switches; a non-S SKU cannot accept sensors.
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 MIJ40X400-50S FAQ
At 0.7 MPa, push increases to 879.6 N and pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It uses a 1/4" air port.
An external stop screw shortens the extend stroke by up to 50 mm on-site, allowing you to set the exact forward position from 350 to 400 mm; the retract stroke remains unaffected. The -S suffix indicates a built-in piston magnet for use with CMSG, DMSG, or EMSG 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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