Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40SB 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 ACEJ20X90-40SB
Double acting and stroke-trimmable, the ACEJ20X90-40SB is an AirTAC ISO 21287 compact cylinder with a 20 mm bore and 90 mm stroke. An external stop screw shortens the extend stroke by up to 40 mm, giving a usable range of 50-90 mm, and the male-threaded rod (B code) bolts straight into tooling. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; in practice plan for roughly 94 N of real work (about 9 kg of vertical lift with a margin), which suits light clamping and small part transfer.
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs, guards and gantries. A hard-anodized aluminium body carries the S45C hard-chrome rod, fixed TPU bumpers absorb end-of-stroke impact at both ends, and because this model carries the optional -S magnet, CMSE / DMSE reed or solid-state switches can be mounted for end-position sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40SB |
|---|---|
| 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 ACEJ20X90-40SB
| 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 ACEJ20X90-40SB Is Used
Small fixture clamping
Trims from 90 mm down to 50 mm to clamp PCB test fixtures or small machined housings, using about 94 N of usable push force at 0.5 MPa.
Light part push-off
Ejects connectors, caps or stamped blanks off a conveyor lane; the 50-90 mm adjustable range lets one cylinder serve several lane widths.
Position-verified sorting
With the fitted -S magnet, CMSE or DMSE switches confirm extend and retract on a sorting gate, so a missing part halts the line.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40SB the Right Cylinder?
Size by force: if 157.1 N push at 0.5 MPa is marginal, step up to bore 25 (245.4 N push at 0.5 MPa); if you only need gentle motion, bore 16 delivers 100.5 N at the same pressure. The 90 mm stroke sits inside the 100 mm maximum standard stroke for bore 20, so no made-to-order build is needed. The stop screw trims extension only within the 40 mm window - it is a mechanical end stop, not a mid-stroke lock, so the rod can still drift if air is lost. FA flange or LB foot mountings fit the ISO 21287 face, and the fitted -S magnet enables CMSE / DMSE switch position feedback.
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 ACEJ20X90-40SB FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push rises to 219.9 N and pull to 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke (40 mm window, usable 50-90 mm), 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, port M5x0.8, rod 10 mm with male thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, ideal for tight jigs and gantries. FA flange or LB foot brackets bolt to the standard face, and fixed TPU bumpers absorb end-of-stroke impact at both ends. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped into the body slots for end-position detection.
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