Airtac MIJ Adjustable Cylinder MIJ20X40-30
The AirTAC Airtac MIJ Adjustable Cylinder MIJ20X40-30 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 MIJ20X40-30
Dial in a precise forward end position on-site with the AirTAC MIJ20X40-30, a round-body stainless steel mini cylinder built for double-acting operation. An external stop screw lets you shorten the extend stroke by up to 30 mm, yielding a usable 10 to 40 mm forward travel without changing the hardware, while retract remains full. The stainless barrel and piston rod supply mild corrosion and washdown resistance.
This Ø20 mm bore generates 157 N of push force and 131.9 N of pull at 0.5 MPa, translating to a safe working load of roughly 94 N or a vertical lift of about 8 kg with a 2:1 margin. It features a 1/8" port, an Ø8 mm rod with an M8x1.25 male thread, and fixed TPU bumper pads to decelerate the stroke end. Conforming to the ISO 6432 mounting interface, it drops into standard mini brackets and clevises.
Airtac MIJ Adjustable Cylinder MIJ20X40-30 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ20X40-30 |
|---|---|
| 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 MIJ20X40-30
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | 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 MIJ20X40-30 Is Used
Sorter Diverter Tuning
Trim the extend stroke by up to 30 mm to perfectly align a package diverter arm without machining new spacers, leveraging the 157 N push force to deflect parcels reliably.
Multi-Stop Forming Press
Use the on-site screw to set a 25 mm intermediate forward position for bending varied material thicknesses, using the 219.8 N push at 0.7 MPa to form light sheet metal.
Adjustable Sealing Jaw
Accommodate different carton depths on a packaging line by shortening the jaw extension, safely applying the 94 N working load to seal flaps without crushing the contents.
Is the Airtac MIJ Adjustable Cylinder MIJ20X40-30 the Right Cylinder?
When sizing this unit, consider the neighboring bores: a smaller Ø16 MIJ yields 100.5 N push at 0.5 MPa, while a larger Ø25 MIJ provides 245.3 N. The integrated adjuster is highly useful for taking up mechanical tolerances or staging feeds, letting one part number cover several stop distances. Remember that the stop screw sets the end position but acts as no mid-stroke lock; the piston will drift on air loss, so add an external rod lock or pilot check valve for held loads.
Mounting options include LB foot, FA flange, and TC trunnion brackets, plus CA, U, R, or CM back covers, though the SDB pivot block is not available on this adjustable variant. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors; select 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 MIJ20X40-30 FAQ
This double-acting 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 30 mm (usable 10-40 mm); retract remains full. This SKU has no magnet and cannot take sensors, but the -S variant enables CMSG/DMSG/EMSG switches. The stainless build resists mild washdown.
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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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