Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75B 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 ACEJ20X80-75B
A double acting compact cylinder built to ISO 21287, the ACEJ20X80-75B pairs a 20 mm bore with an 80 mm stroke that an external stop screw can trim anywhere in a 75 mm window, giving a usable extend range of 5-80 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures where a full-length body will not fit.
The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a male thread (the B code), and fixed TPU bumpers absorb end-of-stroke energy at both ends. For planning, treat roughly 94 N (about 0.6 of the push force) as the practical working force at 0.5 MPa, which corresponds to lifting around 9 kg vertically with a 2:1 margin. Air ports are M5x0.8, speed runs 30-500 mm/s, and the operating band is 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75B |
|---|---|
| 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 ACEJ20X80-75B
| 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 ACEJ20X80-75B Is Used
Small-part press fitting
Presses bearings or bushings into aluminium housings on an electronics assembly bench, where the 157.1 N push at 0.5 MPa suits light interference fits and the 5-80 mm trim range lets one cylinder serve several part heights.
Fixture clamping on CNC jigs
Clamps thin-walled machined parts against hard stops inside a guarded CNC jig; the short ISO 21287 body fits where a full-length profile cylinder would collide with the fixture frame.
Carton ejector on packing lines
Kicks small cartons or blisters off a conveyor lane at up to 500 mm/s, with the stop screw set so the ejector clears the lane edge by exactly the trimmed stroke.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75B the Right Cylinder?
At this bore size the 20 mm unit delivers 157.1 N push at 0.5 MPa; step down to a 16 mm bore (100.5 N) for lighter clamping, or up to 25 mm (245.4 N) when the job needs more margin. Remember the stop screw only shortens the extend stroke within the ordered 75 mm window and is not a mid-stroke lock: on air loss the rod still drifts, so add a separate holding valve if the load must stay put. FA flange and LB foot mounts bolt to the ISO 21287 face, and if you need position sensing, order the -S variant so CMSE / DMSE switches can be used - this model has no magnet fitted.
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 ACEJ20X80-75B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the stop screw trims the 80 mm stroke anywhere in the 75 mm window (usable 5-80 mm). Ports are M5x0.8, the rod is 10 mm with a male thread, speed is 30-500 mm/s, and operating pressure is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, hard-chrome plated S45C rod and fixed TPU bumpers at both ends, about 50% shorter in mounting length than an ISO 15552 profile cylinder. FA flange and LB foot mounts bolt straight on. Position sensing requires the optional -S magnet code, which enables CMSE / DMSE switches; this model (no S code) has no magnet, so no switch can be mounted on it.
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