Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 35mm 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
- Stroke35 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 ACEJ20X35-30B
A double acting compact actuator built to ISO 21287, the ACEJ20X35-30B pairs a 20 mm bore with a 35 mm stroke and a male rod thread on its 10 mm rod. An external stop screw trims the extend stroke anywhere inside the ordered 30 mm window, giving a usable range of 5-35 mm without changing the air supply. 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, with a theoretical ceiling of 32 kgf at 1.0 MPa.
The hard-anodized aluminium body with an S45C hard-chrome plated rod runs on 0.15-1.0 MPa (22-145 psi) filtered air at 30-500 mm/s, and the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding. As a sizing rule, plan on roughly 94 N (about 9.5 kg of thrust) of real work at 0.5 MPa, which is a vertical lift of about 8 kg with a 2:1 margin. Fixed TPU bumpers absorb end-of-stroke shock at both ends, and the optional -S magnet code enables CMSE / DMSE switch sensing; without it no magnet is fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 35 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 ACEJ20X35-30B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -30 | 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 ACEJ20X35-30B Is Used
Small-part press fitting
Presses bearings or bushings into aluminium housings on an electronics assembly bench, where the 5-35 mm trimmed extend stroke matches shallow press depths and 157.1 N at 0.5 MPa is enough for the interference fit.
Carton flap tuck-down
Folds and holds a top flap on a packaging line conveyor, with the male rod thread simplifying tooling attachment and the short body fitting under a low guard.
Fixture part presence check
On a CNC jig, the -S magnet option (ordered separately) lets CMSE / DMSE switches confirm the trimmed end position of each clamp cycle.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30B the Right Cylinder?
At 157.1 N push and 117.8 N pull at 0.5 MPa, this 20 mm bore suits light clamping, ejecting and positioning under about 9.5 kg of working thrust. Step down to a 16 mm bore (100.5 N push) for lighter loads, or up to a 25 mm bore (245.4 N push) when the job needs more muscle at the same pressure. The 30 mm window means you can dial the extend stroke from 5 mm to the full 35 mm on the machine. Remember the stop screw is an end stop only: it sets position but never holds a load if air is lost. Mount on the ISO 21287 face with FA flange or LB foot hardware, add I or Y rod knuckles as needed, and order the -S code if CMSE / DMSE switches are 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 ACEJ20X35-30B 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; the theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 20 mm bore, 35 mm stroke adjustable down to 5 mm via the 30 mm stop-screw window, M5x0.8 ports, PT body thread, male rod thread, 0.15-1.0 MPa (22-145 psi) air filtered to 40 um, 30-500 mm/s speed, -20 to +70 C, and fixed TPU bumpers at both ends.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits cramped jigs and gantries. Sensing is available only with the optional -S magnet code, which allows CMSE or DMSE switches; this model without -S carries no magnet. FA flange, LB foot and I/Y knuckle accessories bolt to the standard ISO 21287 face.
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