
The AirTAC ACEJ80~100 Adjustable Compact Cylinder ACEJ80X300-40 is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø80mm bore and 300mm 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.
The ACEJ80X300-40 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 300 mm stroke by up to 40 mm, giving a usable range of 260-300 mm without changing the order code. The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into long-stroke machines where a full-profile body would not fit.
The hard-anodized aluminium body carries a 20 mm S45C hard-chrome rod, fixed TPU bumpers absorb end-of-stroke energy, and the optional -S magnet enables CMSE / DMSE switches - without the -S code there is no magnet fitted. Speed range is 30-500 mm/s.
| Model | Airtac ACEJ80~100 Adjustable Compact Cylinder ACEJ80X300-40 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø80 mm |
| Stroke | 300 mm |
| Acting type | Double acting, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 2356 N |
| 0.7 MPa | 3299 N |
| Max (@1.0 MPa) | 481 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 (double rod, 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.
About 150 kg of usable push at 0.5 MPa seats automotive subframes into a weld jig; the compact body saves roughly 50% of the length an ISO 15552 profile cylinder would need.
The 20 mm hard-chrome rod and 30-500 mm/s speed suit fast pusher gates, and the optional -S magnet with a DMSE switch confirms the gate has reached the trimmed end position.
If your jig needs a shorter stroke than 260 mm, order a smaller -NN window instead of trimming below the 40 mm limit. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock: on air loss the rod still drifts, so add a separate holding valve for suspended loads. FA flange and LB foot mount on the ISO 21287 face, and the optional -S magnet pairs with CMSE / DMSE switches for end-position sensing.
Quick checklist
At 0.5 MPa it pushes 2513.3 N and pulls 2356.2 N; at 0.7 MPa push is 3518.6 N and pull 3298.7 N, with a theoretical maximum of 512.6 kgf at 1.0 MPa. The -40 code sets a 40 mm adjustment window: an external stop screw shortens the 300 mm extend stroke on site, so the working range is 260-300 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and the port is 1/8" PT with an M12x1.75 female rod thread.
The magnet is not fitted as standard - it is the optional -S ordering code. With -S specified, CMSE or DMSE reed or solid-state switches sense end positions via the magnet slots around the hard-anodized aluminium body. Without -S no magnet is present and no switch can read position. The fixed TPU bumpers at both ends only decelerate the piston near the ends of travel and never hold or brake a load.
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