Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 ACEJ20X80-75SB
The ACEJ20X80-75SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 80 mm stroke by up to 75 mm on site, giving a usable range of 5-80 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. The B code gives a male rod thread on the 10 mm rod, and the S code means the magnet is fitted, so CMSE or DMRE switches - sorry, CMSE or DMSE switches - can be clamped anywhere along the body slots.
Because the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, this model slots into tight jigs, guarding and gantry frames where a full-length body will not reach. For sizing, treat roughly 0.6 of the push force - about 94 N, or 9.6 kg - as the practical working load at 0.5 MPa, and expect it to lift about 8 kg vertically once a 2:1 margin is applied. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the hard-anodized aluminium body with S45C hard-chrome rod stands up to continuous cycling at 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 80 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 ACEJ20X80-75SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACEJ20X80-75SB Is Used
Fixture clamp tuning
Clamping small aluminium brackets on a machining fixture where the final clamp point is set during setup - the stop screw trims the extend stroke anywhere in the 5-80 mm window without swapping cylinders.
Packaging push-off station
Pushing cartons or blisters off a conveyor lane into a chute, where 157.1 N at 0.5 MPa is ample and the short body fits under the conveyor guard frame.
Gantry part present check
A probe or nest actuator on a gantry where the fitted magnet and CMSE / DMSE switches confirm extend and retract, and the male rod thread (B code) takes a custom probe tip directly.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-75SB the Right Cylinder?
At 157.1 N push at 0.5 MPa, the 20 mm bore sits between the 16 mm bore (100.5 N push) and the 25 mm bore (245.4 N push), so step up to 25 mm if your tooling mass grows or step down to 16 mm for lighter pick-and-place heads. The 75 mm adjustment window suits stations where the exact stop position is tuned during commissioning; remember the stop screw is an end stop only - on air loss the piston still drifts, so add a separate valve or lock if position must be held. FA flange and LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report end positions from day one.
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 ACEJ20X80-75SB 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), with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -75 stop screw trims the 80 mm stroke by up to 75 mm, so the usable range is 5-80 mm. Ports are M5x0.8 (fixed by the 20 mm bore), operating pressure is 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, and the maximum standard stroke for this bore is 100 mm.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow guards, jigs and gantries. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or brakes a load. FA flange and LB foot mountings bolt straight to the ISO 21287 face, and because this model carries the optional -S magnet, CMSE / DMSE reed or solid-state switches can be slid into the body slots for end-position feedback.
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