Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30SB 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 ACEJ20X75-30SB
The ACEJ20X75-30SB is a double acting AirTAC compact cylinder built to ISO 21287, with a 20 mm bore, 75 mm stroke and a male rod thread (B code). Its short hard-anodized aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body cannot. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa.
The -30 code adds a 30 mm adjustment window: an external stop screw trims the extend stroke anywhere between 45 and 75 mm on site, so one cylinder covers several fixture positions. As a rule of thumb, plan on roughly 94 N (about 0.6 of the push force) of real work at 0.5 MPa, which lifts around 8 kg vertically with a 2:1 margin. The magnet fitted with the -S code accepts CMSE / DMSE switches, the S45C hard-chrome rod runs at 30-500 mm/s, and fixed TPU bumpers absorb end-of-stroke energy. Operating range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), -20 to +70 C, on air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30SB |
|---|---|
| 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 ACEJ20X75-30SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -30 | 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 ACEJ20X75-30SB Is Used
Adjustable ejection stroke
On a small assembly press fixture, the stop screw sets the extend stroke anywhere from 45 to 75 mm to match different part heights without swapping cylinders.
Compact jig clamping
The short ISO 21287 body fits inside a machining jig where an ISO 15552 profile cylinder would not, delivering 157.1 N push at 0.5 MPa to hold aluminium brackets.
Position-verified slides
With the fitted -S magnet, CMSE or DMSE switches confirm rod position on a pick-and-place slide, while the male rod thread (B) mates directly to the tooling stud.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30SB the Right Cylinder?
At 157.1 N push at 0.5 MPa, this 20 mm bore suits light clamping and positioning. Step down to the 16 mm bore (100.5 N push) for smaller loads, or up to the 25 mm bore (245.4 N push) when you need more margin without changing the M5x0.8 port. Remember the stop screw is a mechanical end stop only: on air loss the rod still drifts, so it is not a mid-stroke lock. FA flange or LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report position.
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 ACEJ20X75-30SB FAQ
This 20 mm bore model pushes 157.1 N and pulls 117.8 N at 0.5 MPa, and 219.9 N / 164.9 N at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -30 stop screw trims the 75 mm stroke down to 45 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, port M5x0.8, rod 10 mm with male thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow pockets and guarded gantries. FA flange and LB foot mountings bolt straight to the standard face, and I or Y rod knuckles are available. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or holds a load. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped onto the body for end-of-stroke signalling.
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