Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30SB 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 ACEJ20X80-30SB
A double acting compact cylinder built to ISO 21287, the ACEJ20X80-30SB pairs a 20 mm bore with an 80 mm stroke that the -30 window lets you trim down to 50 mm on site via an external stop screw. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N on the extend stroke at 0.7 MPa. The hard-anodized aluminium body keeps the mounting length roughly half that of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding where a full-length body cannot.
Because the S code is on this model, the magnet is fitted and CMSE or DMSE reed or solid-state switches can be clipped onto the body for end-of-travel signals. The B code gives a male 10 mm rod thread, and the fixed TPU bumper at each end simply decelerates the piston - it never locks or holds a load. For sizing, treat about 94 N (roughly 0.6 of the push force) as the practical working effort, which equates to lifting about 8 kg vertically with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30SB |
|---|---|
| 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 ACEJ20X80-30SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -30 | 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 ACEJ20X80-30SB Is Used
Fixture clamping on CNC jigs
The 50-80 mm adjustable extend range lets one cylinder serve several fixture heights, while 157.1 N at 0.5 MPa holds light aluminium parts during drilling.
Position-verified ejectors
With the fitted magnet, CMSE or DMSE switches confirm part ejection on small assembly stations without adding external proximity hardware.
Compact press-assist stations
About 94 N of practical working force suits pin insertion and snap-fit pressing in benchtop rigs where the short ISO 21287 body fits under a low gantry.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30SB the Right Cylinder?
At this bore size the 20 mm unit delivers 157.1 N push at 0.5 MPa; if your jig needs more, step up to the 25 mm bore (245.4 N push at 0.5 MPa), and if the load is light the 16 mm bore (100.5 N push) saves space. Remember the stop screw only shortens the extend stroke within the 30 mm window - it is not a mid-stroke lock, so the rod still drifts if air is lost. FA flange, LB foot and I/Y rod knuckles bolt to the ISO 21287 face, and the fitted -S magnet means CMSE / DMSE switches work out of the box. Runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s.
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 ACEJ20X80-30SB 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, with a theoretical maximum of 32 kgf at 1.0 MPa. The -30 code is a 30 mm adjustment window: an external stop screw shortens the 80 mm extend stroke to any value from 50 mm up. It is a mechanical end stop only - on air loss the piston still drifts, so do not rely on it to hold a load.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. This model carries the optional -S magnet, so CMSE / DMSE switches can be mounted directly on the body slots. FA flange, LB foot and I/Y rod knuckles fit the standard face; the B code gives a male rod thread and the port is M5x0.8.
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