Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 45mm 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
- Stroke45 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 ACEJ20X45-10
A double acting compact cylinder built to ISO 21287, the ACEJ20X45-10 pairs a 20 mm bore with a 45 mm stroke that an external stop screw trims on site by up to 10 mm, giving a usable extend range of 35-45 mm. 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 is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding.
In practice that force class means a usable working load of roughly 94 N (about 9.6 kg of real work at 0.5 MPa), and it lifts about 8 kg vertically once a 2:1 margin is applied. The S45C hard-chrome rod ends in a female M6x1.0 thread, TPU bumpers sit at both ends, and the optional -S magnet code enables CMSE / DMSE switch sensing - without -S no magnet is fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 45 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 ACEJ20X45-10
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×45 | 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 ACEJ20X45-10 Is Used
Small-parts ejector on assembly fixtures
The 35-45 mm adjustable extend range lets a jig builder dial in exact ejection travel for connector or PCB push-off stations, with 157.1 N enough for light plastic parts.
Position-verified clamping in test rigs
Order the -S magnet and CMSE / DMSE switches to confirm full clamp on a lab fixture; the 20 mm bore holds small brackets with about 8 kg vertical lift capability.
Bottle stopper on a packaging line
A short 45 mm stroke trimmed to 35 mm suits capping or stopper presses where guarding space is tight and the compact body halves the mounting length of a profile cylinder.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10 the Right Cylinder?
Size against neighbours: the 16 mm bore delivers 100.5 N push at 0.5 MPa, while the 25 mm bore reaches 245.4 N - choose up if 157.1 N is marginal for your load. Remember the stop screw is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Mount with FA flange or LB foot on the ISO 21287 face, add I or Y rod knuckles as needed, and order the -S code if CMSE / DMSE switch positions are required.
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 ACEJ20X45-10 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 pull 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with a 45 mm stroke adjustable down to 35 mm via the 10 mm stop-screw window, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with an M5x0.8 port and female M6x1.0 rod thread.
An external stop screw shortens the extend stroke by up to 10 mm, so the 45 mm stroke can be set anywhere in a 35-45 mm range; it is a mechanical end stop, not a load-holding brake. Switch sensing requires the optional -S magnet code, which allows CMSE / DMSE reed or solid-state switches on the body slots - without -S there is no magnet. FA flange, LB foot and I/Y knuckles bolt straight to the ISO 21287 mounting face.
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