Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40B 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 ACEJ20X80-40B
The ACEJ20X80-40B is a double acting AirTAC compact cylinder built to ISO 21287, with a 20 mm bore and an 80 mm stroke that an external stop screw can trim anywhere in a 40 mm window, giving a usable extend range of 40-80 mm. At 0.5 MPa it pushes with 157.1 N and pulls with 117.8 N, rising to 219.9 N on the extend stroke at 0.7 MPa. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding.
The male rod thread (the B code) bolts straight to tooling without an adapter nut, and the rod is S45C steel with hard-chrome plating running in a roller-burnished, hard-anodized bore. In practice, plan on roughly 94 N of real work at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke energy, speed spans 30-500 mm/s, and pressure runs 0.15-1.0 MPa (22-145 psi). Note that no magnet is fitted on this version; the optional -S code adds one for CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40B |
|---|---|
| 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 ACEJ20X80-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -40 | 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 ACEJ20X80-40B Is Used
Multi-product jig clamping
The 40-80 mm adjustable extend range lets one fixture accept different workpiece heights, with 157.1 N of push at 0.5 MPa holding small machined parts steady.
Packaging line pusher
Compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, fitting beside narrow conveyor frames to divert cartons at 30-500 mm/s.
Lab sample press
About 94 N of usable force at 0.5 MPa presses test cassettes and microplate lids evenly, with the male rod thread mounting the press head directly.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40B the Right Cylinder?
At 157.1 N push at 0.5 MPa, this 20 mm bore suits clamping and positioning in the 9-10 kg class; step down to a 16 mm bore (100.5 N push) for lighter gates, or up to a 25 mm bore (245.4 N push) when the load grows. The 40 mm adjustment window lets one cylinder serve several product widths on the same fixture. The stop screw is a mechanical end stop only - on air loss the piston still drifts, so add a separate valve or lock if you need to hold a load mid-stroke. FA flange or LB foot mounts and I/Y rod knuckles fit the ISO 21287 face, and if position feedback matters, order the -S variant so CMSE / DMSE switches can be used.
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 ACEJ20X80-40B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N, and the theoretical maximum is 32 kgf at 1.0 MPa. The -40 code sets a 40 mm adjustment window: an external stop screw shortens the 80 mm extend stroke on site, so the working range is 40-80 mm. It shortens the stroke only and never extends it past 80 mm.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a fixed TPU bumper at both ends and FA flange, LB foot, FTC brackets plus I/Y rod knuckles available. This version has no magnet fitted; ordering the optional -S code adds one so CMSE / DMSE switches can detect position. Port is M5x0.8 and the rod end is male thread.
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