Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-10B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-10B 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 ACEJ20X75-10B
The ACEJ20X75-10B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 75 mm stroke down by up to 10 mm, giving a usable range of 65-75 mm without changing the cylinder. At 0.5 MPa the 20 mm bore delivers 157.1 N push and 117.8 N pull, rising to 219.9 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. The male (B code) rod thread on the 10 mm rod bolts straight to your tooling.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into shallow fixtures and guarded cells. A rule of thumb for real work: plan on roughly 94 N (about 0.6 of the push force) at 0.5 MPa, which corresponds to lifting about 8 kg vertically - halve that to 4 kg if you want a 2:1 margin. The hard-anodized aluminium body carries a hard-chromed S45C rod, fixed TPU bumpers sit at both ends, and the optional -S magnet code enables CMSE / DMSE switches; this unit has no magnet fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-10B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-10B |
|---|---|
| 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 ACEJ20X75-10B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACEJ20X75-10B Is Used
Ejector on a small assembly press
The 65-75 mm adjustable window lets one cylinder serve several part heights on a benchtop press, with 157.1 N push at 0.5 MPa enough to seat light inserts.
Stopper in a compact indexing fixture
The short body, about 50% shorter than an ISO 15552 profile cylinder, fits inside tight jig plates, and the male rod thread accepts a custom stop pad directly.
Pick-and-place lift on a small gantry
With the optional -S magnet and CMSE / DMSE switches, end positions are confirmed electronically while the 20 mm bore lifts parts of about 4 kg with a 2:1 margin.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-10B the Right Cylinder?
At 157.1 N push (0.5 MPa) this 20 mm bore suits light clamping and positioning; step down to the 16 mm bore (100.5 N push) for tighter spaces or up to the 25 mm bore (245.4 N push) when the load grows. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - the rod will drift if air is lost. Choose FA flange or LB foot mounting to match the fixture, order the -S code if CMSE / DMSE position sensing is needed, and pick PT or G ports at checkout.
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 ACEJ20X75-10B 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 and pull to 164.9 N, with a theoretical maximum of 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), speed 30-500 mm/s, temperature -20 to +70 C, with a 10 mm extend-stroke adjustment window (65-75 mm usable).
An external stop screw shortens the extend stroke by up to 10 mm on site, so the 75 mm stroke can be set anywhere from 65 to 75 mm; it is an end stop, not a load-holding brake. Position sensing requires the optional -S magnet code, which allows CMSE / DMSE switches on the body slots - without -S no magnet is fitted. Mounting options include FA flange and LB foot, and the male rod thread is M6x1.0.
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