This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED20X55SB, the same code under the new prefix. The ACE replacement is a current-production ISO 21287 compact cylinder in the same bore, stroke and force class, with a matching short body and the same mounting-accessory family, so it fits the same envelope. Confirm mounting-interface dimensions against the ACE datasheet before ordering.
Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB
The AirTAC ACPD Double Rod Compact Cylinder ACPD20X55SB is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø20mm bore and 55mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED20X55SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM6×1.0
- StatusDiscontinued → ACED20X55SB
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB
Double acting with a rod leaving both covers, the ACPD20X55SB pushes and pulls with the same 117.8 N at 0.5 MPa (164.9 N at 0.7 MPa) because each stroke works on the rod-side area. The 20 mm bore drives a 10 mm through-rod over a 55 mm stroke at 30-500 mm/s, and the male rod thread (B code) bolts straight to I/Y knuckles on the ISO 21287 mounting face. This model is discontinued; the current-production direct is ACED20X55, so confirm ISO 21287 mounting dimensions before swapping.
The short hard-anodized aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarded gantries. The -S magnet this model carries accepts CMSE / DMSE reed or solid-state switches for end-position feedback.
Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED20X55SB |
| Bore size | Ø20 mm |
| Stroke | 55 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 bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACED20X55SB (ISO 21287) carries the same bore/stroke/force class; confirm mounting-interface dimensions against the ACE datasheet before installation. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G.
Theoretical Output Force (Ø20mm)
| 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).
Model Code: Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB
| ACPD | DIN compact cylinder (double-rod, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| S | Optional built-in magnet for sensor position sensing (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
Replacement mapping (swap P for E): ACP→ACE, ASP→ASE, ATP→ATE, ACPD→ACED, ACPJ→ACEJ. ACP-family: ACP (double acting), ASP / ATP (single acting push / pull), ACPD (double rod), ACPJ (double rod, adjustable stroke).
Where the Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB Is Used
Push-pull gauge station
The equal 117.8 N output in both directions seats and retracts a dial-indicator probe on an inspection fixture, with the back rod carrying a sensor flag.
Label applicator head
A packaging line uses the 55 mm stroke to press and release a labeling pad, with CMSE / DMSE switches confirming pad contact via the -S magnet.
Small-parts ejection
A CNC bar-feeder ejects finished 6 kg blanks from a fixture using the through-rod's side-load resistance and male-thread rod end.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB with the ACED20X55SB
At 117.8 N per side at 0.5 MPa, bore 20 sits between the 16 mm (75.4 N) and 25 mm (206.2 N) double-rod frames; step up to 25 mm if your tooling weight creeps past about 12 kg of vertical lift. The 55 mm stroke is within the 100 mm standard range for this bore. Note that a plain double-rod cylinder drifts when air is lost, so add a rod lock or pilot check for a held load. Foot (LB) and flange (FA/FB) mounts plus the male rod thread cover most fixture styles, and ACED20X55 is the current replacement to quote.
Replacement checklist
- ✓ Current-production ACE → ACED20X55SB
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPD Double Rod Compact Cylinder ACPD20X55SB FAQ
Because a rod exits both covers, output is equal both ways: 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 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um. The 55 mm stroke is standard for the 20 mm bore (max standard 100 mm).
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a fixed TPU bumper at each end and FA/FB, LB, CA/CB, CR, SDB and FTC mounting options. The ACPD family is discontinued; ACED20X55 is the current direct in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before ordering.
Related AirTAC ACE Cylinders
Request a Quote for the ACED20X55SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACED20X55SB replacement — usually within 7-8 hours.