Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S is a genuine double acting, adjustable stroke + cushion round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- 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 MICJ Adjustable Mini Cylinder MICJ20X125-40S
Trim the forward stop by up to 40 mm on-site without swapping hardware using the AirTAC MICJ20X125-40S. This double-acting, round-body stainless-steel mini cylinder pairs a 125 mm nominal stroke with an adjustable extend range of 85-125 mm, dialing in exact endpoints while the retract remains full. A needle-set variable air cushion at both ends soaks up high-speed shock, letting you set the position and control the impact simultaneously. The stainless barrel and piston rod supply mild corrosion and washdown resistance, and the built-in -S magnet enables CMSG, DMSG, or EMSG position switches.
Delivering 157 N of push force at 0.5 MPa (131.9 N pull), it yields a safe working load of roughly 94 N, capable of vertically lifting about 8 kg with a 2:1 margin. It features an 8 mm piston rod, an M8x1.25 male rod thread, and a 1/8" air port. Conforming to the ISO 6432 mounting interface for Ø16-Ø25 bores, it drops directly into standard mini brackets and clevises.
Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S |
|---|---|
| Series | MICJ ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MICJ Adjustable Mini Cylinder MICJ20X125-40S
| MICJ | ISO 6432 round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -40 | 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 MICJ Adjustable Mini Cylinder MICJ20X125-40S Is Used
Adjustable Sorting Diverter
Fine-tune the 85-125 mm extend stroke to deflect packages of varying widths on a conveyor, relying on the 157 N push force and air cushions to absorb high-speed impacts.
Vertical Press Dampener
Safely lower an 8 kg tooling head with a 2:1 margin, using the 40 mm extend trim to set the exact lowering depth and the needle cushion to prevent harsh bottoming.
Washdown Component Pusher
Push stainless hardware into a washdown station, utilizing the corrosion-resistant stainless steel barrel and the -S magnet to trigger an EMSG sensor upon completion.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S the Right Cylinder?
If you need less push, the smaller Ø16 bore provides 100.5 N at 0.5 MPa, whereas stepping up to the Ø25 bore yields 245.3 N for heavier fixtures. This Ø20 bore is ideal for fast, settable-position moves where the 40 mm extend adjuster and dual air cushions prevent end-of-stroke banging. Choose LB foot, FA flange, or TC trunnion mounts, as the SDB pivot-block is not offered on adjustable-stroke variants. The -S magnet allows CMSG/DMSG/EMSG sensors for end-of-stroke confirmation.
Remember that the external stop screw sets the extend end position only; it is not a mid-stroke lock. The cylinder will drift and the piston will not hold its load on air loss, as the air cushion solely decelerates near the stroke end. For suspended loads, install an external rod lock or pilot-operated check valve.
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 MICJ Adjustable Mini Cylinder MICJ20X125-40S FAQ
This double-acting cylinder pushes with 157 N and pulls with 131.9 N at 0.5 MPa. At 0.7 MPa, push is 219.8 N and pull is 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa. It uses a 1/8" air port and an 8 mm piston rod with an M8x1.25 male thread.
An external stop screw shortens the extend stroke by up to 40 mm on-site, while the retract stroke remains fixed. A needle-set variable air cushion at both ends decelerates the piston near the stroke ends to absorb high-speed shock, but it is not a mid-stroke lock. The -S designation indicates a built-in piston magnet for use with CMSG, DMSG, or EMSG reed and electronic 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.
Related AirTAC MICJ Cylinders
Request a Quote for Airtac MICJ Adjustable Mini Cylinder MICJ20X125-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.