Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40B 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 ACEJ20X90-40B
The ACEJ20X90-40B is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 90 mm stroke that an external stop screw trims anywhere in a 40 mm window, giving a usable extend range of 50-90 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. The male rod thread (B code) on the 10 mm S45C hard-chrome rod bolts straight to standard tooling.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into compact pick-and-place heads and guarded test rigs. As a planning figure, treat roughly 94 N (about 0.6 of the push rating) as the force available for real work at 0.5 MPa, which corresponds to lifting about 8 kg vertically with a 2:1 margin. Note this model carries no magnet: order the optional -S code if you later need CMSE / DMSE switch position feedback.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40B |
|---|---|
| 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 ACEJ20X90-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×90 | Stroke length in mm. |
| -40 | 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 ACEJ20X90-40B Is Used
Small-parts ejection from molding fixtures
The 157.1 N push at 0.5 MPa clears nylon or aluminum micro-parts off a mold face, and the 50-90 mm adjustable range lets one cylinder serve several mold depths.
Bench-top leak and press-fit test stations
About 8 kg of vertical lift with margin seats test plugs on small housings, while the compact body fits inside the guarding of a lab bench rig.
Diverting light cartons on conveyor lines
With roughly 94 N of usable work force at 0.5 MPa, the cylinder pushes 100-200 g packages across a sorter lane, and the male rod thread accepts a custom pusher paddle.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40B the Right Cylinder?
Size the job first: if 157.1 N of push at 0.5 MPa is marginal, step up to the 25 mm bore (245.4 N); if you need far less, the 16 mm bore delivers 100.5 N and saves more space. The 90 mm stroke sits under the 100 mm maximum standard stroke for this bore, so it ships as a standard build. Remember the stop screw only shortens the extend stroke within the 40 mm window and acts as an end stop, not a mid-stroke lock: on air loss the piston still drifts. FA flange or LB foot mounts and I/Y rod knuckles fit the ISO 21287 face, and the male rod thread suits clevis-style tooling.
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 ACEJ20X90-40B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum 32 kgf at 1.0 MPa. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, with a fixed TPU bumper at both ends and an M5x0.8 port.
An external stop screw shortens the 90 mm extend stroke by up to 40 mm, so you can set any extend length from 50 to 90 mm on site; it is an end stop, not a load-holding brake. This version has no magnet, so no switch can be read from it; order the optional -S magnet variant to enable CMSE / DMSE reed or solid-state switches. The hard-anodized aluminium body mounts via FA flange or LB foot and saves about 50% of the mounting length of an ISO 15552 profile cylinder.
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