Airtac MIJ Adjustable Cylinder MIJ20X120-50S
The AirTAC Airtac MIJ Adjustable Cylinder MIJ20X120-50S is a genuine double acting, adjustable stroke round-body mini air cylinder with a Ø20mm bore and 120mm stroke, 1/8" 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.
- BoreØ20 mm
- Stroke120 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM8×1.25
- 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 MIJ20X120-50S
Dial in your forward end position on-site with the AirTAC MIJ20X120-50S, a round-body stainless mini cylinder that lets an external stop screw shorten the extend stroke by up to 50 mm. You get a usable forward range of 70-120 mm without swapping parts, while retract remains a full 120 mm. As a double-acting actuator built to the ISO 6432 mounting interface, it delivers 157 N of push force at 0.5 MPa.
The stainless-steel barrel and rod shrug off mild corrosion and washdown environments. With a safe working load around 94 N, it can vertically lift roughly 8 kg using a 2:1 safety margin. This -S variant includes a piston magnet for CMSG, DMSG, or EMSG sensors, and fixed TPU bumper pads absorb end-of-stroke impacts. Air connects via a 1/8" port.
Airtac MIJ Adjustable Cylinder MIJ20X120-50S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ20X120-50S |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MIJ20X120-50S
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MIJ Adjustable Cylinder MIJ20X120-50S Is Used
Staged Part Ejection
Use the 50 mm extend adjustment to push parts of varying widths off a belt without repositioning the cylinder, relying on the 157 N force to clear obstructions cleanly.
Carton Flap Folding
Fine-tune the forward stop to fold different carton depths on a packaging line, using the 8 kg vertical lift capacity to handle heavier cardboard materials.
Tolerance Take-Up Jig
Absorb mechanical tolerances in machining fixtures by dialing in the exact extend position on-site, letting the fixed TPU bumpers cushion the final approach.
Is the Airtac MIJ Adjustable Cylinder MIJ20X120-50S the Right Cylinder?
If 157 N of push at 0.5 MPa is too much, step down to the MIJ16 (100.5 N push); if you need more muscle, the MIJ25 offers 245.3 N. The 50 mm adjustment window is perfect for taking up mechanical tolerances or staging feeds during changeovers. Remember that the stop screw only trims the extend end—it is not a mid-stroke lock. The piston will drift on air loss, so fit an external rod lock or pilot check valve if you must hold a load. You can use LB foot, FA flange, or TC trunnion mounts, but SDB pivot blocks are 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 MIJ20X120-50S FAQ
At 0.5 MPa it provides 157 N push and 131.9 N pull. At 0.7 MPa it provides 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa. This 20 mm bore cylinder uses a 1/8" air port and an M8x1.25 male rod thread.
An external stop screw shortens the extend stroke by up to 50 mm, giving a usable forward range of 70-120 mm, while retract remains the full 120 mm. The -S suffix means a piston magnet is built-in for CMSG, DMSG, or EMSG position sensors. The stainless build resists mild corrosion.
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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