Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm 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.
- BoreØ12 mm
- Stroke35 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S
A double acting ISO 21287 compact cylinder with an adjustable extend stroke, the ACEJ12X35-20S pairs a 12 mm bore with a 35 mm stroke that an external stop screw trims by up to 20 mm on site, giving a usable range of 15-35 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N on the extend side at 0.7 MPa, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. Air runs at 0.15-1.0 MPa (22-145 psi) and the rod travels 30-500 mm/s.
The hard-anodized aluminium body with an S45C hard-chrome rod saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarded cells. Because the -S magnet is fitted, CMSE / DMSE reed or solid-state switches can be clamped straight onto the body. For sizing, plan on roughly 34 N of real work at 0.5 MPa (about 60% of the push rating), which is around 3 kg of vertical lift with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 35 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 ACEJ12X35-20S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | 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 ACEJ12X35-20S Is Used
Micro part presence checks
The fitted -S magnet with a CMSE switch confirms the 15-35 mm trimmed extend stroke reached on small electronic component trays, at speeds up to 500 mm/s.
Watch and connector pin insertion
About 34 N of usable push at 0.5 MPa seats delicate pins in watch movements and connector housings without overloading the 6 mm rod.
Lab slide gating
The short body, roughly half the length of an ISO 15552 profile cylinder, gates sample slides inside compact analytical instruments where space is scarce.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S the Right Cylinder?
For this force class, bore 16 delivers 100.5 N push at 0.5 MPa when the 56.5 N of the 12 mm bore is marginal, while stepping down is not possible since 12 mm is the smallest ACEJ bore. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve if the load must stay put. FA flange or LB foot mounts and I / Y rod knuckles bolt to the ISO 21287 face, and the female M3x0.5 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 ACEJ12X35-20S FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push is 79.2 N, and the theoretical maximum is 11.5 kgf at 1.0 MPa. The 12 mm bore 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 35 mm stroke adjustable down to 15 mm via the 20 mm stop-screw window and an M5x0.8 port.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, threaded aluminium covers and a fixed TPU bumper at each end that only decelerates the piston at stroke ends. FA flange, LB foot, FTC brackets and I / Y knuckles mount on the standard face. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be fitted for end-of-stroke detection.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.