Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 ACEJ20X50-10S
The ACEJ20X50-10S is a double acting AirTAC compact cylinder built to ISO 21287, with a 20 mm bore and a 50 mm stroke that an external stop screw trims by up to 10 mm, giving a usable extend range of 40-50 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N push at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. As a rule of thumb, plan on roughly 94 N (about 9 kg) of real work at 0.5 MPa, which lifts around 4-5 kg vertically with a 2:1 margin.
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. The hard-anodized aluminium body carries an S45C hard-chrome plated rod, fixed TPU bumpers absorb end-of-stroke energy at both ends, and the fitted -S magnet lets CMSE or DMSE switches report position. It runs on 40 um filtered air at 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 50 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 ACEJ20X50-10S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 ACEJ20X50-10S Is Used
Small-part ejection from plastic molds
The 40-50 mm trimmed extend range knocks lightweight molded caps or bushings off the ejector side, with 157.1 N of push at 0.5 MPa enough for small parts.
Bench-top press fixture for electronics
Around 94 N of usable force at 0.5 MPa presses connectors or bearings into PCB assemblies, and the 10 mm window lets you set the exact stop height per product.
Gated indexing on a compact conveyor
The fitted -S magnet drives CMSE or DMSE switches for extend/retract confirmation, and the short body fits the narrow gap beside a light-duty transfer belt.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10S the Right Cylinder?
For a 50 mm stroke with fine end-position trimming, this 20 mm bore sits between the 16 mm bore (100.5 N push at 0.5 MPa) and the 25 mm bore (245.4 N push at 0.5 MPa). Pick the 16 mm bore for lighter clamping, or step up to 25 mm when your fixture needs more margin. Remember the stop screw is an end stop only: on air loss the rod still drifts, so do not treat it as a load-holding lock. FA flange or LB foot mounts bolt to the standard face, the rod end is female M6x1.0, and the -S magnet is already fitted for CMSE / DMSE switch mounting.
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 ACEJ20X50-10S 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. The -10 code means a stop screw shortens the 50 mm extend stroke by up to 10 mm, so the working range is 40-50 mm. It is double acting, runs at 30-500 mm/s on 0.15-1.0 MPa (22-145 psi) air, and the stop is an end stop, not a mid-stroke lock.
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 can be clipped to the body for position feedback. FA flange and LB foot mounts bolt to the standard face, the rod end is female M6x1.0, and the air port is M5x0.8.
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