Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 90mm 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
- Stroke90 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 ACEJ20X90-50
The ACEJ20X90-50 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N push at 0.7 MPa. An external stop screw trims the 90 mm stroke by up to 50 mm on site, giving a usable extend range of 40-90 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding. In practice, plan for roughly 94 N of real work at 0.5 MPa (about 60% of the push rating), which is roughly 9 kg of vertical lift with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the optional -S magnet enables CMSE / DMSE switches; without -S no magnet is fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 90 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 ACEJ20X90-50
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×90 | Stroke length in mm. |
| -50 | 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 ACEJ20X90-50 Is Used
Jig clamping on small CNC fixtures
The 40-90 mm adjustable extend range lets a machinist dial in clamp travel per fixture, with 157.1 N push at 0.5 MPa holding light aluminium parts.
Product divert on packaging lines
Compact body fits under low guarding where a full-length profile cylinder will not, and the stop screw matches the push-off stroke to each carton size.
Sample press in lab automation
About 9 kg of vertical lift with a 2:1 margin suits capping or pressing small vials, and the optional -S magnet feeds CMSE switch feedback to the controller.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50 the Right Cylinder?
At 20 mm bore this unit sits between the 16 mm size (100.5 N push at 0.5 MPa) and the 25 mm size (245.4 N push), so step up if your load needs more than about 94 N of usable force. The 90 mm stroke is within the 100 mm max standard stroke for this bore. Note the stop screw is a mechanical end stop only: on air loss the piston still drifts, so it is not a mid-stroke lock. Order FA flange or LB foot mounting to suit the fixture, and add the -S code if CMSE / DMSE position sensing is planned.
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 ACEJ20X90-50 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -50 code is a 50 mm adjustment window: an external stop screw shortens the 90 mm extend stroke by up to 50 mm, so the usable range is 40-90 mm. It cannot lengthen the stroke past 90 mm, and the stop is not a load-holding brake.
It is an ISO 21287 compact cylinder whose hard-anodized aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with an M5x0.8 port, M6x1.0 female rod thread, fixed TPU bumpers both ends and 30-500 mm/s speed. Sensing requires the optional -S magnet code; with -S ordered, CMSE / DMSE switches mount in the body slots. Without -S there is no magnet, so no switch can be read.
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