
The AirTAC Airtac ACEJ80~100 Adjustable Compact Cylinder ACEJ100X250-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø100mm bore and 250mm stroke, 1/8" 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.
A heavy-duty double acting compact cylinder built to ISO 21287, the ACEJ100X250-20 pairs a 100 mm bore with a 250 mm stroke that an external stop screw trims by up to 20 mm on site, giving a usable extend range of 230-250 mm. At 0.5 MPa it pushes with 3927 N and pulls with 3769.9 N, and the hard-anodized aluminium body with an S45C hard-chrome plated rod keeps the short package rigid. Running on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), it cycles at 30-500 mm/s between fixed TPU bumpers at both ends.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so a 250 mm stroke fits inside presses, gantries and guarding that a full-length body cannot. In practice, plan for roughly 2356 N of real work at 0.5 MPa (about 0.6 of the push rating), which is a vertical lift of around 120 kg with a 2:1 margin - enough to raise a 100 kg pallet fixture with headroom. Note this model has no magnet fitted; order the -S code if you need CMSE / DMSE switch sensing.
| Model | Airtac ACEJ80~100 Adjustable Compact Cylinder ACEJ100X250-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M12×1.75 |
| 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 300 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3770 N |
| 0.7 MPa | 5498 N | 5278 N |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -20 | 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.
The 3927 N push at 0.5 MPa (5497.8 N at 0.7 MPa) suits staking pins and light forming on aluminium housings, with the 20 mm window letting you dial the 250 mm stroke down to 230 mm for part-specific tooling.
With about 120 kg of vertical lift at a 2:1 margin, the cylinder raises pallet fixtures or weldment nests between stations, and the compact body fits inside the cell guarding where a longer profile cylinder will not.
Food and packaging lines use the 1/8" ported 100 mm bore to swing heavy gates and clamp chutes, with LB foot mounting on the standard ISO 21287 face for quick drop-in replacement.
At this bore size the step either way is large: a 63 mm bore delivers 1558.6 N push at 0.5 MPa, while the 125 mm bore reaches 6135.9 N - so the 100 mm is the mid-heavy choice when 63 mm stalls under load but 125 mm is oversize. If your load must stay put on air loss, remember the stop screw only shortens the extend stroke; it is a mechanical end stop, not a mid-stroke lock, so add an external locking solution for holding. Mount with FA flange or LB foot on the ISO 21287 face, and specify the -S magnet code at order time if CMSE / DMSE position feedback is planned.
Quick checklist
At 0.5 MPa it pushes 3927 N and pulls 3769.9 N; at 0.7 MPa push rises to 5497.8 N and pull to 5277.9 N, with a theoretical maximum of 800.9 kgf at 1.0 MPa. Speed range is 30-500 mm/s on air filtered to 40 um, operating pressure 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C. The 250 mm stroke can be shortened by up to 20 mm via the stop screw, and the rod end carries a female M12x1.75 thread with a 1/8" PT port.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so the 250 mm stroke fits tight machines, and FA flange or LB foot brackets bolt straight to the standard face. Sensing is not fitted on this code: the magnet is the optional -S order code, so specify ACEJ100X250-20S if you want CMSE / DMSE reed or solid-state switches to work along the body slots.
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