Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 55mm 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
- Stroke55 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 ACEJ20X55-10
The ACEJ20X55-10 is a double acting AirTAC compact cylinder built to ISO 21287, with a 20 mm bore and a 55 mm stroke that an external stop screw trims on site within the ordered 10 mm window, giving a usable extend range of 45-55 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 maximum of 32 kgf at 1.0 MPa. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, and a fixed TPU bumper at each end absorbs end-of-stroke energy.
Because the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, this model slots into tight fixtures, slides and guarding where a full-length body cannot. As a rule of thumb, plan on roughly 94 N (about 0.6 of the push force) for real work at 0.5 MPa, which corresponds to lifting about 8 kg vertically with a 2:1 margin. Note that this unit has no magnet fitted; the optional -S code adds one so CMSE / DMSE switches can be used. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 55 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 ACEJ20X55-10
| 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 ACEJ20X55-10 Is Used
Bench-top press fixture
The 157.1 N push at 0.5 MPa suits light pressing of small electronics housings or snap-fit plastic parts, and the 10 mm trim window lets you dial the 55 mm stroke down to 45 mm to match part height without re-plumbing.
Small-part divert gate on a conveyor
With about 8 kg of vertical lift capability at a 2:1 margin, the cylinder can swing or lift a lightweight gate to divert pills, connectors or fasteners, and the compact body fits beside narrow belt frames.
Clamp in a CNC jig
The short ISO 21287 body, roughly half the mounting length of an ISO 15552 profile cylinder, tucks inside crowded milling jigs, while the M6x1.0 female rod thread accepts standard knuckles for swing clamps.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X55-10 the Right Cylinder?
Size this bore by load: the next size down, a 16 mm bore, delivers only 100.5 N push at 0.5 MPa, while stepping up to a 25 mm bore raises it to 245.4 N. If your jig needs more than about 94 N of usable force at 0.5 MPa, choose the 25 mm; for light clamping and indexing under that, the 16 mm may suffice. Remember the stop screw only shortens the extend stroke and is not a mid-stroke lock, so the rod still drifts if air is lost. Mounting: FA flange or LB foot bolt to the ISO 21287 face, with I and Y rod knuckles available; order the -S variant if you need position sensing with CMSE / DMSE switches.
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 ACEJ20X55-10 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 32 kgf at 1.0 MPa. The ordered stroke is 55 mm and the -10 stop screw trims the extend stroke by up to 10 mm, so the working range is 45-55 mm. Speed is 30-500 mm/s and pressure 0.15-1.0 MPa (22-145 psi).
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, hard-chrome plated S45C rod, threaded covers and a fixed TPU bumper at both ends that only decelerates the stroke ends. Mounting options include FA flange and LB foot. Sensing requires the optional -S magnet code; this model has no magnet, so CMSE / DMSE switches can only be used if you order that variant.
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 ACEJ20X55-10
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.