Airtac MIJ Adjustable Cylinder MIJ20X120-50
The AirTAC Airtac MIJ Adjustable Cylinder MIJ20X120-50 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 MIJ20X120-50
Trimming the forward end position by up to 50 mm on site, this stainless-steel round-body mini cylinder removes the need to swap hardware when dialing in a 70-120 mm extend stroke. The external stop screw sets the exact forward position for tolerance take-up or rapid changeover, while the retract stroke remains full length. As a double-acting actuator operating at 0.15-1.0 MPa, it delivers a push force of 157 N and a pull force of 131.9 N at 0.5 MPa.
Built with a stainless barrel and piston rod, the riveted construction resists mild corrosion and washdown environments. It uses the ISO 6432 mounting interface for standard mini brackets and features fixed TPU bumper pads to decelerate the stroke end. Based on the 0.5 MPa push rating, a safe working load is roughly 94 N, which equates to lifting about 8 kg vertically with a 2:1 margin. This specific SKU lacks a magnet and cannot host position sensors, while the -S variant enables CMSG, DMSG, or EMSG switches.
Airtac MIJ Adjustable Cylinder MIJ20X120-50 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ20X120-50 |
|---|---|
| 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 MIJ20X120-50
| 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 MIJ20X120-50 Is Used
Staged Part Feeding
Dial in the extend stroke by up to 50 mm to push varied part sizes onto a belt without changing the cylinder, utilizing the 157 N push force for reliable transitions.
Changeover Tooling Stops
Set exact forward positions for different machining fixtures on the fly, using the external stop screw to absorb mechanical tolerances quickly.
Variable Carton Flap Folding
Adjust the extend end on site to fold differing carton depths, letting the 8 kg vertical lift capacity handle lightweight packaging materials safely.
Is the Airtac MIJ Adjustable Cylinder MIJ20X120-50 the Right Cylinder?
When sizing this 20 mm bore, the adjacent 16 mm bore yields 100.5 N of push at 0.5 MPa, whereas stepping up to the 25 mm bore provides 245.3 N. The integrated stop screw is ideal for staging feeds or matching multiple stops under one part number, but remember it only trims the extend end and acts purely as an end position setter, not a mid-stroke lock. If your process loses air, the piston will drift and drop the load, so deploy an external rod lock or pilot check valve for secure holding.
Mounting options include LB foot brackets, FA flanges, and TC trunnions, but the SDB pivot block is not available for this adjustable variant. Air connections use a 1/8" port, and the male rod thread is M8x1.25. Because this exact model is shipped without a magnet, it cannot accept CMSG, DMSG, or EMSG sensors; specify the -S version if you require position detection.
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 MIJ20X120-50 FAQ
This 20 mm bore cylinder uses a 1/8" port and generates 157 N push / 131.9 N pull at 0.5 MPa, and 219.8 N push / 184.7 N pull at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 50 mm, giving a usable forward range of 70-120 mm; the retract stroke remains full. The screw is not a mid-stroke lock, and the cylinder will drift on air loss, so an external rod lock is needed to hold a load.
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1-Year Warranty
Covers non-human-caused product damage.
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