Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 80mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. Its short compact envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder.
- BoreØ20 mm
- Stroke80 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75
A double acting compact actuator built to ISO 21287, the ACEJ20X80-75 pairs a 20 mm bore with an 80 mm stroke and an external stop screw that trims the extend stroke anywhere within the ordered 75 mm window, giving a usable range of 5-80 mm. At 0.5 MPa it pushes with 157.1 N, and the hard-anodized aluminium body with an S45C hard-chrome plated rod keeps it running through 30-500 mm/s cycles from -20 to +70 C.
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight pick-and-place heads and fixture plates. For sizing, treat roughly 94 N (about 0.6 of the push force) as the practical working effort at 0.5 MPa, which corresponds to lifting about 8 kg vertically with a 2:1 margin. Note this unit has no magnet fitted; order the -S version if CMSE / DMSE switch sensing is needed later.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 – 500 mm/s |
| Cushion | Fixed TPU bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACE-series (ISO 21287) datasheet. Body: hard-anodized aluminium alloy; piston rod: S45C carbon steel with hard-chrome plating. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G. A built-in magnet is OPTIONAL — add the -S code to fit CMSE / DMSE position sensors.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 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 ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -75 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for CMSE / DMSE sensors (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
ACE-family variants: ACE (double acting), ASE / ATE (single acting push / pull), ACED (double rod), ACEJ (adjustable stroke), TACE / TACED (non-rotating twin-guide yoke). Mounting accessories: FA / FB flange, LB foot, CA / CB clevis, CR, SDB pivot, FTC; plus I and Y knuckles. Thread PT (blank) / G.
Where the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 Is Used
Fixture clamp with set stroke
The 75 mm window lets one cylinder serve several jig depths: dial the extend stop from 5 mm up to the full 80 mm, delivering about 157 N of clamping force at 0.5 MPa on small aluminium brackets.
Small part ejection from dies
A punch-shop ejector for connector housings uses the 219.9 N push at 0.7 MPa to kick parts off the die face, with the stop screw set so the rod never over-travels into the die shoe.
Lab gate on a test bench
A short-stroke gate on an automated test rig swings a lightweight shield using the 80 mm stroke at 30-500 mm/s, with the M5x0.8 ports plumbed straight from bench regulators.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 the Right Cylinder?
At 157.1 N push / 117.8 N pull (0.5 MPa) this bore 20 sits between the 16 mm size (100.5 N push) and the 25 mm size (245.4 N push), so step up if your tooling mass grows. The 80 mm stroke is within the 100 mm standard limit for this bore. The stop screw is a mechanical end stop only: it sets where the rod bottoms out, and on air loss the piston still drifts, so do not rely on it to hold a load mid-stroke. FA flange or LB foot mountings bolt to the ISO 21287 face, and the female M6x1.0 rod thread accepts standard rod knuckles.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short stroke fits the compact body
- ✓ Port/thread type (PT / G)
- ✓ Add -S if you need the magnet for sensors
- ✓ Rod type (female / male B) & mount (FA/LB/CA)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Compact body: keep the stroke short and avoid side load on the rod.
- check Do not dismantle the threaded front/back covers.
- check Keep speed within the rated range; the TPU bumper absorbs stroke-end energy.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push rises to 219.9 N and pull to 164.9 N. The theoretical maximum at 1.0 MPa is 32 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed spans 30-500 mm/s.
An external stop screw shortens the extend stroke on site by up to 75 mm, so the effective range is 5-80 mm; it cannot lengthen the stroke past 80 mm. The fixed TPU bumper at both ends absorbs end-of-stroke energy. This version has no magnet, so no CMSE or DMSE switch can be mounted; order the -S code to enable position sensing. FA flange and LB foot mountings fit the ISO 21287 face directly.
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