Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 35mm stroke, 1/8" 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 size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20
A double acting ISO 21287 compact cylinder with an adjustable extend stroke, the ACEJ20X35-20 uses a 20 mm bore and a 35 mm base stroke. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N on the extend side at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. An external stop screw trims the extend stroke on site anywhere in the ordered 20 mm window, giving a usable range of 15-35 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 where a full-length body will not fit. In practice, plan on roughly 94 N of usable push at 0.5 MPa, which corresponds to lifting about 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers absorb end-of-stroke energy, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 35 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| 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 ACEJ20X35-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×35 | 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 ACEJ20X35-20 Is Used
Small-parts press fitting
Presses dowel pins or bushings into aluminium housings on an assembly bench, using about 94 N of usable push at 0.5 MPa, with the stroke trimmed between 15 and 35 mm to match part height.
Pick-and-place gantry z-axis
Lifts roughly 8 kg parts vertically with a 2:1 margin on a compact robot gantry, where the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder.
Fixture part present check
Confirms a machined bracket is seated in a CNC fixture before cycle start; add the -S magnet option to enable CMSE or DMSE switch feedback, since this unit ships without a magnet.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-20 the Right Cylinder?
For this 35 mm stroke class, compare forces: the 16 mm bore delivers 100.5 N push at 0.5 MPa while the 25 mm bore reaches 245.4 N, so the 20 mm bore at 157.1 N sits between them for light clamping and positioning. If the load must stay put on air loss, add an external locking valve, because the stop screw sets stroke length only and the piston still drifts when pressure drops. Order the -S code if CMSE or DMSE switches are needed; this model has no magnet fitted. FA flange, LB foot and I/Y rod knuckles bolt to the ISO 21287 face, and the female M6x1.0 rod thread takes standard tooling plates.
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 ACEJ20X35-20 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the stop screw trims the 35 mm stroke by up to 20 mm, so the working range is 15-35 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um, port 1/8", rod thread M6x1.0 female.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium barrel, S45C hard-chrome plated rod and fixed TPU bumpers at both ends that only decelerate the piston at stroke ends. FA flange, LB foot and I/Y rod knuckles mount on the standard face. Position sensing requires the optional -S magnet code; without it no magnet is fitted, so CMSE or DMSE switches cannot be mounted.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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