Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 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 ACEJ20X70-10B
The ACEJ20X70-10B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. A 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. The external stop screw trims the 70 mm extend stroke anywhere within the ordered 10 mm window, giving a usable range of 60-70 mm without changing the valve or plumbing.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding. The hard-anodized aluminium body carries a hard-chromed S45C rod with a male thread (the B code), and fixed TPU bumpers at both ends absorb end-of-stroke energy. For sizing, plan on roughly 94 N of real work at 0.5 MPa (about 0.6 of the push force), which corresponds to lifting around 9 kg vertically with a 2:1 margin. Speed range is 30-500 mm/s over 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 70 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 ACEJ20X70-10B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 ACEJ20X70-10B Is Used
Small-part ejection on assembly stations
The 60-70 mm adjustable extend stroke lets a line technician dial in the exact eject distance for connectors or housings, with 157.1 N of push at 0.5 MPa clearing parts reliably.
Light fixture clamping on CNC jigs
About 94 N of usable work force at 0.5 MPa holds aluminium blanks against CNC jig stops, and the compact body fits where a full-length profile cylinder cannot.
Vertical lower-and-lift of small pallets
With a 2:1 margin the bore lifts roughly 9 kg vertically, ideal for lowering small pallets or trays in packaging cells at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10B the Right Cylinder?
At this force class, a 16 mm bore (100.5 N push at 0.5 MPa) suits lighter pick-and-place loads, while a 25 mm bore (245.4 N push) covers heavier clamping; the 20 mm bore sits between them. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock: on air loss the piston can still drift, so do not rely on it to hold a load. Mount with FA flange or LB foot brackets, and if you need position sensing, order the -S variant with the optional magnet for CMSE / DMSE switches - this model has no magnet fitted.
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 ACEJ20X70-10B 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; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 20 mm bore, 70 mm stroke adjustable down to 60 mm via the 10 mm stop-screw window, an M5x0.8 port, a male-threaded 10 mm rod, 0.15-1.0 MPa (22-145 psi) operating pressure, 1.5 MPa (215 psi) proof pressure, -20 to +70 C temperature range and 30-500 mm/s speed.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, freeing space in tight gantries and guards. Fixed TPU bumpers at both ends soften end-of-stroke contact without any adjustment needed. The B code gives a male rod thread for direct attachment to tooling, FA flange or LB foot brackets bolt to the standard face, and CMSE / DMSE switches work only if you order the optional -S magnet - this model ships without one.
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