Airtac MIJ Adjustable Cylinder MIJ8X50-40S
The AirTAC Airtac MIJ Adjustable Cylinder MIJ8X50-40S is a genuine double acting, adjustable stroke round-body mini air cylinder with a Ø8mm bore and 50mm stroke, M5×0.8 air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ8 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- CushionFixed TPU bumper pads
About the Airtac MIJ Adjustable Cylinder MIJ8X50-40S
Dial in a precise forward end position on-site with the AirTAC MIJ8X50-40S, a round-body stainless steel mini cylinder featuring a 40 mm extend-stroke adjustment window. Rather than stocking multiple cylinders for different stops, a single external screw trims the forward travel anywhere from 10 to 50 mm, while retract remains full stroke. Built with a riveted stainless barrel and Ø4 mm rod, it handles mild washdown environments and conforms to ISO 6432 mounting dimensions for Ø8 bores.
At 0.5 MPa this 8 mm bore double-acting actuator delivers 25.1 N of push force and 18.8 N of pull, translating to a safe working load of about 15 N or a 1.3 kg vertical lift with a 2:1 margin. The M5x0.8 port and M4x0.7 male rod thread keep the envelope compact. Fixed TPU bumper pads decelerate the stroke ends, and the included -S piston magnet supports CMSG, DMSG or EMSG sensors for position confirmation.
Airtac MIJ Adjustable Cylinder MIJ8X50-40S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ8X50-40S |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 50 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 150 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G.
Theoretical Output Force (Ø8mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 25 N | 19 N |
| 0.7 MPa | 35 N | 26 N |
| Max (@1.0 MPa) | 5 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MIJ Adjustable Cylinder MIJ8X50-40S
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 8 | Bore size in mm. |
| ×50 | 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 (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MIJ Adjustable Cylinder MIJ8X50-40S Is Used
Micro-Clamp Positioning
Trim the extend stroke by up to 40 mm to dial in the exact clamping depth on delicate sub-gram electronic components without swapping actuators.
Light-Diverter Gate
Set a specific push distance to deflect small lightweight parcels on a conveyor, using the 25.1 N force to nudge items accurately.
Staged Parts Ejection
Adjust the forward stop to push tiny molded parts varying distances into a sorting chute, accommodating changeovers on the fly.
Is the Airtac MIJ Adjustable Cylinder MIJ8X50-40S the Right Cylinder?
When sizing this 8 mm bore, step up to the MIJ12 (56.5 N push @0.5 MPa) if your payload exceeds the 15 N safe working load, or drop down if a smaller footprint is needed since no smaller MIJ bore exists. The 40 mm adjustment screw is ideal for taking up mechanical tolerances during setup or covering multiple intermediate stops with one part number. Keep in mind the stop screw sets the forward position but does not lock the piston on air loss; for holding a suspended load, add an external pilot check valve. Mount via LB foot, FA flange or TC trunnion (SDB 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 MIJ Adjustable Cylinder MIJ8X50-40S FAQ
This double-acting 8 mm bore cylinder uses an M5x0.8 air port. It generates 25.1 N push and 18.8 N pull at 0.5 MPa, 35.2 N push and 26.4 N pull at 0.7 MPa, with a theoretical maximum of 5.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 40 mm (usable forward range 10-50 mm); retract remains full. The screw sets the end position but is not a mid-stroke lock, so the piston drifts on air loss. The -S magnet enables CMSG/DMSG/EMSG sensors.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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