Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 55mm 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
- Stroke55 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 ACEJ20X55-10S
A double acting ISO 21287 compact cylinder, the ACEJ20X55-10S pairs a 20 mm bore with a 55 mm stroke that an external stop screw trims by up to 10 mm, giving a usable extend range of 45-55 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding.
In practice, plan on roughly 94 N of real work at 0.5 MPa, and expect it to lift about 8 kg vertically once a 2:1 margin is applied. This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clipped into the body slots for end-of-stroke sensing. A fixed TPU bumper sits at both ends, the rod is S45C steel with hard chrome, and the female M6x1.0 rod thread accepts standard knuckles.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 55 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 ACEJ20X55-10S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×55 | 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 ACEJ20X55-10S Is Used
Fixture clamping on CNC jigs
The 45-55 mm trim window lets a machinist dial the clamp stroke to the fixture, with 157.1 N at 0.5 MPa enough for light aluminium parts.
Small-part kickers on packaging lines
At 30-500 mm/s the 55 mm stroke ejects cartons or blisters from a conveyor lane, and CMSE switches confirm the reject fired.
Lab press and sample indexing
About 8 kg of vertical lift capacity suits lifting microscope slides or sample trays between test stations in compact benches.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10S the Right Cylinder?
Size check: a 16 mm bore delivers 100.5 N push at 0.5 MPa, while stepping up to 25 mm gives 245.4 N, so this 20 mm unit at 157.1 N sits mid-range for light clamping and indexing. Remember the stop screw only shortens the extend stroke and drifts on air loss, so it is not a load lock. FA flange, LB foot and I/Y knuckles bolt to the ISO 21287 face; the fitted -S magnet enables CMSE / DMSE switching.
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 ACEJ20X55-10S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 10 mm adjustable extend window (45-55 mm usable), runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), -20 to +70 C, speed 30-500 mm/s, 1/8" ports and a female M6x1.0 rod thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, ideal for tight gantries. This model includes the optional -S magnet, so CMSE or DMSE reed or solid-state switches mount in the body slots. A fixed TPU bumper decelerates at each end, and FA flange or LB foot mounts bolt straight on.
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