Airtac MIJ Adjustable Cylinder MIJ20X40-20
The AirTAC Airtac MIJ Adjustable Cylinder MIJ20X40-20 is a genuine double acting, adjustable stroke round-body mini air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 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 MIJ20X40-20
Dial in your forward end position on the fly with the AirTAC MIJ20X40-20, a double-acting round-body mini cylinder built with a stainless-steel barrel and rod for mild washdown resistance. An external stop screw lets you shorten the extend stroke by up to 20 mm right at the machine, meaning one part number can cover several forward stops without swapping hardware. Retract remains at the full 40 mm.
Delivering 157 N of push force at 0.5 MPa, this ISO 6432 mounting-interface unit handles a safe working load of roughly 94 N or lifts about 8 kg vertically with a 2:1 margin. It uses a 1/8" port and fixed TPU bumper pads to decelerate the stroke end. Note this specific SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ20X40-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ20X40-20 |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MIJ20X40-20
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -20 | 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 MIJ20X40-20 Is Used
Adjustable Stop Gauging
Set precise forward stops for part profiling or gauging fixtures. The 20 mm adjustment window lets operators fine-tune the 157 N extend force to touch off on varying material thicknesses without retooling.
Changeover Diverters
Ideal for conveyor diverters that handle multiple package sizes. Dial in the exact extend position on site to push different carton widths without changing out the entire cylinder assembly.
Tolerance Take-up Pushers
Compensate for mechanical wear or varying part tolerances in a packaging line. The external screw trims the extend stroke to ensure consistent contact pressure using the 8 kg vertical lift capacity.
Is the Airtac MIJ Adjustable Cylinder MIJ20X40-20 the Right Cylinder?
When sizing this 20 mm bore, compare it directly against its neighbors: stepping down to the MIJ16 drops your 0.5 MPa push force to 100.5 N, while moving up to the MIJ25 raises it to 245.3 N. The integrated adjuster is perfect for taking up mechanical tolerances during setup or handling changeover jobs where the extend target shifts by a few millimeters. Keep in mind the stop screw only sets the end position; it is not a mid-stroke lock, and the cylinder will drift on air loss. For positive holding, specify an external rod lock or pilot check valve.
This model drops into standard ISO 6432 mini brackets and clevises, including LB foot, FA flange, and TC trunnion styles, but the SDB pivot block is not available on this adjustable variant. If your application requires position sensing, you must select the -S magnet version of this cylinder to enable switch mounting.
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 MIJ20X40-20 FAQ
This 20 mm bore cylinder features a 1/8" port and an M8x1.25 male rod thread. At 0.5 MPa it provides 157 N push and 131.9 N pull force. 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.
An external stop screw shortens the extend stroke by up to 20 mm on site, giving a usable forward range of 20 to 40 mm, while retract remains full stroke. This SKU does not have a magnet and cannot accept CMSG, DMSG, or EMSG sensors; you must specify the -S variant for position sensing.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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