Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 45mm 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
- Stroke45 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 ACEJ20X45-10S
The ACEJ20X45-10S is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 45 mm stroke that can be trimmed on site: an external stop screw shortens the extend stroke by up to 10 mm, giving a usable range of 35-45 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, and its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarded stations where a full-length body cannot.
Because the -S magnet is fitted on this model, CMSE or DMSE reed and solid-state switches can be clamped anywhere along the body slots for end-of-stroke signalling. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the hard-anodized aluminium body with an S45C hard-chrome plated rod stands up to continuous cycling at 30-500 mm/s. For sizing, treat roughly 94 N (about 0.6 of the push force) as the practical working effort at 0.5 MPa, which corresponds to lifting around 9 kg vertically, or about 4-5 kg with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 45 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 ACEJ20X45-10S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| -10 | 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 ACEJ20X45-10S Is Used
Fixture clamp with trimmed stroke
On a small CNC jig, the stop screw lets you dial the clamp stroke anywhere from 35 to 45 mm so the pad seats on parts of slightly different heights without re-plumbing.
Pick-and-place with position feedback
With the fitted magnet and CMSE switches on the body slots, a compact feeder arm confirms extend and retract positions inside a 45 mm envelope.
Lab dosing slide
A 157.1 N push at 0.5 MPa is enough to drive a small dosing or sample-slide mechanism in analytical equipment, where the short body keeps the module footprint minimal.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10S the Right Cylinder?
At 157.1 N push (0.5 MPa) this 20 mm bore suits light clamping, part present sensors and small lift tasks up to roughly 9 kg vertical. Step down to the 16 mm bore (100.5 N push) for lighter fixtures, or up to the 25 mm bore (245.4 N push) when the load grows. Remember the stop screw is a mechanical end stop for the extend stroke only - on air loss the piston drifts, so do not treat it as a load-holding lock. It mounts on the standard ISO 21287 face with FA flange or LB foot hardware plus I/Y rod knuckles, and PT ports take 1/8-inch-class fittings at this bore size M5x0.8.
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 ACEJ20X45-10S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N and pull 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -10 code means a stop screw trims the 45 mm extend stroke by up to 10 mm, so the working range is 35-45 mm. It runs double acting on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um at 30-500 mm/s.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. This model carries the optional -S magnet, so CMSE or DMSE reed or solid-state switches mount in the body slots; FA flange, LB foot and I/Y rod knuckles bolt to the standard face.
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