Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 ACEJ20X75-75B
A double acting compact actuator built to ISO 21287, the ACEJ20X75-75B pairs a 20 mm bore with a 75 mm stroke that an external stop screw can trim anywhere from 0 to 75 mm on site. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N on the extend stroke at 0.7 MPa, with a theoretical ceiling of 32 kgf at 1.0 MPa. The hard-anodized aluminium body carries magnet slots, and the S45C hard-chrome rod ends in a male thread thanks to the B code.
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into shallow fixtures and guarded cells. A fixed TPU bumper at each end absorbs end-of-stroke shock, and speed runs 30-500 mm/s across 0.15-1.0 MPa (22-145 psi). As a rule of thumb, plan on roughly 94 N of usable work at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. Note that no magnet is fitted on this version; the optional -S code adds one for CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 75 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 ACEJ20X75-75B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -75 | 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 ACEJ20X75-75B Is Used
Ejector on a small assembly press
The 0-75 mm adjustable extend stroke lets one cylinder serve multiple part heights, with 157.1 N at 0.5 MPa enough to push finished components off the nest.
Fixture clamp in a compact jig
The short ISO 21287 body fits jigs too shallow for a full-length profile cylinder, and the male rod thread (B code) bolts straight to custom clamp arms.
Product diverter on a packaging line
Trim the stroke with the stop screw to match lane width, and the 117.8 N pull at 0.5 MPa retracts the pusher reliably at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75B the Right Cylinder?
At 157.1 N push, bore 20 suits light clamping and small part transfer. Step down to bore 16 (100.5 N push at 0.5 MPa) for tighter loads, or up to bore 25 (245.4 N) when the work grows. The -75 window means one cylinder can be set to any extend stroke from 0 to 75 mm, useful when product sizes change. The stop screw is a mechanical end stop only: on air loss the piston drifts, so add a separate valve or lock if position must be held. Mount with FA flange or LB foot, and order the -S variant if CMSE / DMSE sensing is planned.
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 ACEJ20X75-75B FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push rises to 219.9 N (pull 164.9 N). Theoretical maximum is 32 kgf at 1.0 MPa. It is double acting, 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, port M5x0.8, rod 10 mm with male thread, and a 75 mm stroke adjustable from 0 to 75 mm by the external stop screw.
An external stop screw shortens the extend stroke on site anywhere within the ordered 75 mm window, so the effective range is 0-75 mm; it cannot lengthen the stroke past 75 mm. The stop is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Sensing requires the optional -S magnet code; this model has no magnet, so CMSE / DMSE switches cannot be mounted unless -S is ordered. A fixed TPU bumper at each end absorbs end-of-stroke impact.
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