Airtac MIJ Adjustable Cylinder MIJ8X40-30S
The AirTAC Airtac MIJ Adjustable Cylinder MIJ8X40-30S is a genuine double acting, adjustable stroke round-body mini air cylinder with a Ø8mm bore and 40mm 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
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- 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 MIJ8X40-30S
Trimming the forward end by up to 30 mm via an external stop screw, this stainless round-body mini cylinder lets you dial in the exact extend position from 10 to 40 mm without swapping parts. As the double-acting adjustable variant of the MI series, it provides 25.1 N of push force at 0.5 MPa while retracting fully on the return stroke.
The Ø8 bore features a 4 mm rod, an M5x0.8 port, and an M4x0.7 male rod thread. Built with a stainless barrel and rod for mild washdown resistance, it conforms to ISO 6432 mounting dimensions and includes a piston magnet for position sensing. The fixed TPU bumper pads decelerate the stroke ends, yielding a safe working load of about 15 N or a 1.3 kg vertical lift with a 2:1 margin.
Airtac MIJ Adjustable Cylinder MIJ8X40-30S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ8X40-30S |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 40 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 MIJ8X40-30S
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 8 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -30 | 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 MIJ8X40-30S Is Used
Micro-actuation positioning
Dial in the exact 10 to 40 mm forward reach for small pick-and-place probes, using the 25.1 N push force to trigger micro-switches without overtravel.
Lightweight part ejection
Set a precise extend stop to eject lightweight plastic components from a mold cavity, safely moving about 1.3 kg of vertical load with a 2:1 safety margin.
Adjustable stroke limiters
Fine-tune the forward end position on the fly for changeover jobs between slightly different product lengths, avoiding the need to physically swap cylinders.
Is the Airtac MIJ Adjustable Cylinder MIJ8X40-30S the Right Cylinder?
For lighter duty, the MIJ series does not offer a smaller bore than Ø8, making this the baseline mini option; stepping up to a Ø12 bore increases the 0.5 MPa push force to 56.5 N when higher thrust is required. The 30 mm adjustment window is ideal for taking up mechanical tolerances during setup or staging feeds, allowing one part number to cover several intermediate stops.
Because this is an -S SKU, you can directly mount CMSG, DMSG, or EMSG sensors for end-of-stroke confirmation. Note that the stop screw only sets the forward end position and does not lock the piston mid-stroke; the cylinder will drift on air loss, so add an external pilot check valve if you need to hold a suspended load. Mounting options include LB foot, FA flange, and TC trunnion (SDB is not available 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 MIJ8X40-30S FAQ
This Ø8 bore cylinder has an M5x0.8 port and a 4 mm rod. It generates 25.1 N push and 18.8 N pull at 0.5 MPa, or 35.2 N push and 26.4 N pull at 0.7 MPa. The theoretical maximum force is 5.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 30 mm, allowing you to set the forward end position between 10 and 40 mm; the retract stroke remains full. 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.
Request a Quote for Airtac MIJ Adjustable Cylinder MIJ8X40-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.