
The AirTAC Airtac ACED Double-acting Compact Cylinder ACED20X50S is a genuine double acting, double rod ISO 21287 compact air cylinder with a Ø20mm bore and 50mm 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 ACED20X50S is a double acting, double-rod compact cylinder built to the ISO 21287 short-body format. A 10 mm rod exits both covers, so the piston sees the rod-side area on each stroke and delivers an equal 117.8 N at 0.5 MPa (164.9 N at 0.7 MPa) in either direction. The S in the code means the optional magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signalling.
The hard-anodized aluminium body with an S45C hard-chrome-plated rod runs at 0.15-1.0 MPa (22-145 psi) and 30-500 mm/s, with a fixed TPU bumper at each end. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jig plates and guarding. As a rule of thumb, plan on roughly 70 N of usable work at 0.5 MPa (about 60% of the rating), which corresponds to lifting around 3.5 kg vertically with a 2:1 margin.
| Model | Airtac ACED Double-acting Compact Cylinder ACED20X50S |
|---|---|
| Series | ACED compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 50 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. |
| ×50 | 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.
The 117.8 N both-ways force and 50 mm stroke clamp small aluminium brackets in drilling fixtures, and the short ISO 21287 body fits where a full-length profile cylinder will not.
With the magnet fitted, CMSE or DMSE switches confirm extend and retract on a conveyor lane diverter pushing cartons up to about 3.5 kg equivalent load.
A rod on each cover drives a two-sided gauge slide with equal force and no rod-side pressure difference, keeping the carriage balanced at 30-500 mm/s.
At 117.8 N per direction, this 20 mm bore sits between the 16 mm size (75.4 N at 0.5 MPa) and the 25 mm size (206.2 N at 0.5 MPa); step up if your tooling needs more than about 70 N of working force. The 50 mm stroke is well inside the 100 mm maximum standard stroke for bore 20, so it ships as a catalogue item. The through-rod resists rotation and light side load and gives a symmetric mount, and the back-end rod can carry a sensor flag. If the load must stay put when air is lost, add a rod lock or pilot check - a plain double-rod cylinder will drift. Female M6x1.0 rod thread, PT ports, and FA/FB flange, LB foot or FTC brackets bolt straight to the ISO 21287 face.
Quick checklist
Yes - the double-rod design exposes the rod-side area on both strokes, so output is equal each way: 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. Bore is 20 mm, stroke 50 mm, rod 10 mm, port M5x0.8, 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, and FA/FB flange, LB foot or FTC brackets bolt to the standard face. The S code on ACED20X50S means the optional magnet is fitted, so CMSE / DMSE switches can be mounted on the body; models without the S code carry no magnet. A fixed TPU bumper decelerates the piston at each end of stroke.
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