Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40B 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 ACEJ20X75-40B
A double acting compact actuator built to ISO 21287, the ACEJ20X75-40B pairs a 20 mm bore with a 75 mm stroke that an external stop screw trims anywhere in a 40 mm window, giving a usable extend range of 35-75 mm. 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. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into tight jig plates and guarding where a full-length body will not fit.
For sizing, treat roughly 94 N (about 60% of the 0.5 MPa push) as the practical working force, which corresponds to lifting around 8 kg vertically with a 2:1 margin. The male rod thread (B code) suits external rod couplings and knuckles, the fixed TPU bumper at each end absorbs end-of-stroke impact, and the S45C hard-chrome plated rod keeps wear low. Speed range is 30-500 mm/s over 0.15-1.0 MPa (22-145 psi) of clean, 40 um filtered air.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40B |
|---|---|
| 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 ACEJ20X75-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -40 | 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 ACEJ20X75-40B Is Used
Jig clamping on CNC fixtures
The 35-75 mm adjustable extend range lets one cylinder serve different part heights on a machining fixture, with 157.1 N of push holding steel workpieces against locators.
Packaging line product stops
A 75 mm pop-up or stop stroke on a bottling conveyor, trimmed down to 35 mm for narrow cartons, with the compact body fitting under low guard rails.
Lab sample press station
Gentle 30-500 mm/s pressing of sample vials or test coupons, where the about 8 kg vertical lift equivalent matches small fixture weights with margin.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40B the Right Cylinder?
At 157.1 N push at 0.5 MPa this 20 mm bore sits between the 16 mm bore (100.5 N) and the 25 mm bore (245.4 N); step up if your load needs more than about 94 N of working force. Note the stop screw only shortens the extend stroke and drifts on air loss, so it is not a mid-stroke lock. This version has no magnet: order the -S code if you later need CMSE or DMSE switch position feedback. FA flange, LB foot and I/Y rod knuckles bolt to the standard ISO 21287 face, and the male rod thread takes external couplings directly.
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 ACEJ20X75-40B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -40 code is a 40 mm adjustment window: an external stop screw shortens the 75 mm extend stroke on site to any value from 35 to 75 mm. It is a mechanical end stop only, so the rod can still drift if air is lost.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a fixed TPU bumper at both ends to absorb end-of-stroke impact. This model has no magnet fitted; the optional -S code adds one so CMSE or DMSE switches can sense position. FA flange, LB foot and I/Y rod knuckles mount on the standard face, and the male rod thread accepts external couplings.
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