
The AirTAC Airtac ACED Double-acting Compact Cylinder ACED20X40 is a genuine double acting, double rod ISO 21287 compact air cylinder with a Ø20mm bore and 40mm 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.
The ACED20X40 is a double acting, double-rod compact cylinder built to ISO 21287: a 20 mm bore with a 40 mm stroke and a 10 mm rod leaving both covers, so the output force is identical on the extend and retract strokes (117.8 N at 0.5 MPa, 164.9 N at 0.7 MPa). The hard-anodized aluminium body with an S45C hard-chrome plated rod runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight lab fixtures and small assembly heads. As a rule of thumb, plan on about 70 N of usable work at 0.5 MPa, and expect roughly 6 kg of vertical lift with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke shock, and the optional -S magnet enables CMSE / DMSE switches.
| Model | Airtac ACED Double-acting Compact Cylinder ACED20X40 |
|---|---|
| Series | ACED compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod |
| 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.
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 118 N |
| 0.7 MPa | 165 N |
| Max (@1.0 MPa) | 24 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
| ACED | ISO 21287 compact cylinder (double-rod). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| 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.
A 20 mm bore pressing vial caps or microplate seals needs only about 117.8 N from each rod end at 0.5 MPa; the 40 mm stroke clears the fixture and the through-rod keeps the plunger aligned.
Symmetric 117.8 N push and pull at 0.5 MPa ejects machined pins from a indexing fixture and retracts the tool in the same stroke window at 30-500 mm/s.
With a rod at both covers, one ACED20X40 drives a sliding guard or chute flap from either face, and the rear rod can carry a sensor flag when the optional -S magnet is ordered.
At 117.8 N per side at 0.5 MPa, the 20 mm bore sits between the 16 mm bore (75.4 N) and the 25 mm bore (206.2 N), so step up if your tooling mass grows. The 40 mm stroke is well inside the 100 mm maximum standard stroke for this bore. Choose the female M6x1.0 rod thread as coded, or add B for a male thread; FA/FB flange, LB foot and FTC brackets plus I/Y knuckles bolt to the ISO 21287 face. Remember that a plain double-rod cylinder drifts when air is lost - add a rod lock or pilot check if the load must stay put.
Quick checklist
Because a rod exits both covers, force is equal in both directions: 117.8 N at 0.5 MPa and 164.9 N at 0.7 MPa, with a maximum of 24.0 kgf at 1.0 MPa. Operating range 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, air filtered to 40 um.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits cramped jigs and gantries. Sensing is optional: order the -S code to get the magnet for CMSE / DMSE switches; without -S there is no magnet. A fixed TPU bumper at each end absorbs end-of-stroke shock, and FA/FB flange, LB foot and FTC mounts plus I/Y knuckles bolt straight to the standard face.
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