Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 20mm 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.
- BoreØ12 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B
The ACEJ12X20-10B is a double acting AirTAC compact cylinder built to ISO 21287, with a 12 mm bore and a 20 mm stroke that an external stop screw can trim anywhere in a 10 mm window, giving a usable extend range of 10-20 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures where a full-length body simply will not fit.
Plan on roughly 34 N (about 3.5 kgf) of real work at 0.5 MPa rather than the full 56.5 N rating, and for vertical lifts treat it as lifting about 2.9 kg with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a male thread (the B code), a fixed TPU bumper sits at both ends, and the optional -S magnet enables CMSE / DMSE switches - without that code no magnet is fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 20 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 ACEJ12X20-10B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -10 | 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 ACEJ12X20-10B Is Used
Micro part clamping
Holds small electronics or watch-movement parts in a machining fixture, where the 10-20 mm adjustable extend range lets you dial in the exact clamp position without shimming.
Presence push-off on PCB lines
Ejects rejected PCBs from a conveyor lane; with the optional -S magnet a CMSE or DMSE switch confirms the rod has retracted between cycles.
Sample press in lab automation
Applies about 34 N of usable force at 0.5 MPa to press microplate seals, fitting the tight deck space thanks to the short ISO 21287 body.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X20-10B the Right Cylinder?
For this 12 mm bore, 56.5 N push at 0.5 MPa suits light clamping and part-presenting tasks; step up to the 16 mm bore (100.5 N push) if you need nearly double the force, or drop to a smaller frame only if your fixture demands it. The 20 mm stroke with a 10 mm adjustment window covers 10-20 mm of extend travel, and the male rod thread (B) mates directly with I or Y rod knuckles. Remember the stop screw is a mechanical end stop, not a mid-stroke lock - on air loss the piston still drifts. FA flange or LB foot mounting bolts to the ISO 21287 face, and order the -S code if you will need CMSE / DMSE position sensing.
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 ACEJ12X20-10B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 20 mm stroke adjustable down to 10 mm, M5x08 ports (M5x0.8), 0.15-1.0 MPa (22-145 psi) operating pressure, 1.5 MPa (215 psi) proof pressure, -20 to +70 C temperature range, and 30-500 mm/s speed.
An external stop screw shortens the 20 mm extend stroke by up to 10 mm, so the working range is 10-20 mm; it is an end stop only and never holds a load on air loss. Switches are possible only with the optional -S magnet code, which allows CMSE / DMSE reed or solid-state switches on the magnet slots; without -S there is no magnet. The fixed TPU bumper at both ends absorbs end-of-stroke energy, and FA flange or LB foot brackets bolt straight to the ISO 21287 face.
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