This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED20X55B, 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 ACPD20X55B
The AirTAC ACPD Double Rod Compact Cylinder ACPD20X55B 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 ACED20X55B (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 → ACED20X55B
- 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 ACPD20X55B
Double acting with a rod leaving both covers, the ACPD20X55B pushes and pulls with identical force because each stroke works on the rod-side area: 117.8 N at 0.5 MPa and 164.9 N at 0.7 MPa in either direction. The 20 mm bore drives a 10 mm through-rod over a 55 mm stroke, with a fixed TPU bumper at each end and speeds of 30-500 mm/s. This model is discontinued; the current-production successor is the ACED20X55 in the same bore, stroke and force class.
The short ISO 21287-class body cuts mounting length by roughly 50% versus an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding where a full-length body cannot. The male rod thread (B code) takes standard rod knuckles directly. For real-world sizing, treat about 70 N (roughly 7 kg of vertical lift) as the usable working force at 0.5 MPa rather than the full 117.8 N rating. Note there is no magnet fitted on this code; the optional -S version is required before CMSE or DMSE switches can be used.
Airtac ACPD Double Rod Compact Cylinder ACPD20X55B Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD20X55B |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED20X55B |
| 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 ACED20X55B (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 ACPD20X55B
| 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 ACPD20X55B Is Used
Reciprocating test stations
The through-rod carries a sensor flag on the rear end while the front rod drives a probe into an electronics test fixture, cycling at up to 500 mm/s with equal 117.8 N force in both directions.
Symmetric push-pull jigs
A plastics assembly jig uses the male-threaded rods on both covers to clamp and release a moulded clip from two sides, needing the same 164.9 N at 0.7 MPa on each stroke.
Compact divert gates
On a packaging line where guard space is tight, the short body fits beside a conveyor and the back-end rod actuates a gate position flag while the front rod swings the diverter.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD20X55B with the ACED20X55B
At 117.8 N per side at 0.5 MPa, the 20 mm bore suits light clamping and transfer tasks; drop to the 16 mm bore (75.4 N) for gentler handling or step up to the 25 mm bore (206.2 N) if the load grows. The 55 mm stroke sits well inside the 100 mm maximum standard stroke for this bore, so no made-to-order stroke is needed. Because a plain through-rod cylinder drifts when air is lost, add a rod lock or pilot check if the load must stay put. Order the -S code if you need the magnet for CMSE / DMSE switches. For new designs, specify the ACED20X55 and confirm the ISO 21287 mounting dimensions before swapping.
Replacement checklist
- ✓ Current-production ACE → ACED20X55B
- ✓ 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 ACPD20X55B FAQ
Because a rod exits both covers, force is equal both ways: 117.8 N at 0.5 MPa and 164.9 N at 0.7 MPa on every stroke, using the rod-side area. At 1.0 MPa the bore reaches a maximum of 24.0 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating, and speed runs 30-500 mm/s.
AirTAC no longer produces the ACPD family. The direct successor is the ACED20X55, the ISO 21287 version with the same 20 mm bore, 55 mm stroke and force class. Confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to a DIN-standard face.
Related AirTAC ACE Cylinders
Request a Quote for the ACED20X55B
Send us the quantity and destination. We confirm price, stock and lead time on the ACED20X55B replacement — usually within 7-8 hours.