Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-20B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-20B 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 ACEJ20X90-20B
This AirTAC ACEJ20X90-20B is a double acting ISO 21287 compact cylinder with a 20 mm bore and 90 mm stroke, and its male rod thread (the B code) bolts straight to external tooling. An external stop screw trims the extend stroke by up to 20 mm on site, giving a usable range of 70-90 mm without swapping the cylinder. 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 short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarded cells. In practice, plan on roughly 94 N of real work at 0.5 MPa (about 0.6 of the push rating), which is enough to lift about 8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke impact, and the hard-anodized aluminium body with an S45C hard-chrome rod runs at 30-500 mm/s on air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-20B |
|---|---|
| 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 ACEJ20X90-20B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×90 | Stroke length in mm. |
| -20 | 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 ACEJ20X90-20B Is Used
Bench press clamping
With 157.1 N push at 0.5 MPa and a 70-90 mm trim range, it clamps small aluminium brackets on a light pneumatic press jig.
Small parts ejection
The male rod thread drives a stripper pin that kicks moulded caps off a nest; the 20 mm window lets you tune the eject position.
Gantry stopper
Used as a pop-up stop on a conveyor gantry where the compact body fits the 90 mm slot a full-length profile cylinder cannot.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-20B the Right Cylinder?
Size down to the ACEJ16 (100.5 N push at 0.5 MPa) for lighter clamping, or step up to the ACEJ25 (245.4 N push) when the load creeps past about 94 N of usable force. This unit has no magnet fitted; order the -S code if you later need CMSE or DMSE switches for position feedback. FA flange, LB foot and I/Y rod knuckles bolt to the ISO 21287 face. Note the stop screw is a mechanical end stop for the extend stroke only - on air loss the piston drifts, so it is not a load-holding lock.
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 ACEJ20X90-20B 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. The theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8.
The -20 code sets a 20 mm adjustment window: a stop screw at the head shortens the 90 mm extend stroke to any length from 70 to 90 mm. The B code gives a male rod thread for direct nut mounting. The body is a hard-anodized ISO 21287 compact design about 50% shorter in mounting length than an ISO 15552 profile cylinder, with a fixed TPU bumper at both ends. No magnet is fitted; the optional -S code enables CMSE / DMSE switches.
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