This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACED40X55S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACED40X55S in place of this model. 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 ACPD40X55S
The AirTAC Airtac ACPD Double Rod Compact Cylinder ACPD40X55S is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø40mm bore and 55mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED40X55S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ40 mm
- Stroke55 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM8×1.25
- StatusDiscontinued → ACED40X55S
- 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 ACPD40X55S
A double acting, double-rod compact cylinder built to the DIN-standard ACP pattern, the ACPD40X55S pushes a 40 mm bore through a 55 mm stroke and delivers 571.8 N at 0.5 MPa in BOTH directions, because a rod exits each cover and both strokes work on the rod-side area. At 0.7 MPa that rises to 800.5 N either way. The through-rod resists rotation and side load, gives a symmetric mounting face, and the rear rod can carry a sensor flag, while fixed TPU bumpers pad both ends of travel.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight pick-and-place gantries and guarding where a full-length body will not fit. In practice, plan on roughly 343 N of usable push at 0.5 MPa, which is about 29 kg of vertical lift with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, runs on 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s, and the fitted -S magnet accepts CMSE / DMSE switches. Note: this model is discontinued; the current drop-in is the ACED40X55, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPD Double Rod Compact Cylinder ACPD40X55S Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD40X55S |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED40X55S |
| Bore size | Ø40 mm |
| Stroke | 55 mm |
| Acting type | Double acting, double rod |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 200 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACED40X55S (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 (Ø40mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 572 N |
| 0.7 MPa | 800 N |
| Max (@1.0 MPa) | 117 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 ACPD40X55S
| ACPD | DIN compact cylinder (double-rod, discontinued). |
|---|---|
| 40 | 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 (adjustable stroke).
Where the Airtac ACPD Double Rod Compact Cylinder ACPD40X55S Is Used
Symmetric clamp on a CNC fixture
The through-rod lets the 40 mm bore clamp a machined housing from either side with an equal 571.8 N at 0.5 MPa, so one cylinder handles both clamp and release stations on a jig plate.
Pusher on a bottling line conveyor
A 55 mm stroke and 30-500 mm/s speed suit diverting 25 kg cartons off a 400 mm belt, with the rear rod carrying a DMSE switch flag for position feedback.
Guide posts on a pallet elevator
The double rod resists the side load of a rising pallet platform, and the short body fits under the lift frame where an ISO 15552 profile cylinder would be too long.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD40X55S with the ACED40X55S
Size the job both ways: if 571.8 N at 0.5 MPa is more than you need, the ACPD32X55 gives 345.6 N in the same compact envelope; if you need more, the ACPD50X55 reaches 881.2 N both ways. Remember a plain double-rod cylinder drifts when air is lost - for a held load add a rod lock or pilot check valve. This unit already carries the optional -S magnet for CMSE / DMSE switches, and FA/FB flange or LB foot mounts bolt to the standard face. Since the ACPD is discontinued, order the ACED40X55 as the current-production replacement and verify the ISO 21287 mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACED40X55S
- ✓ 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 ACPD40X55S FAQ
Because it is a double-rod cylinder, output is identical on both strokes: 571.8 N at 0.5 MPa and 800.5 N at 0.7 MPa, equal push and pull, based on the rod-side area of the 40 mm bore. At the full 1.0 MPa rating the cylinder reaches about 116.6 kgf. It runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um, proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with a fixed TPU bumper at each end.
AirTAC no longer produces the ACPD family. The current drop-in is the ACED40X55, the ISO 21287 successor: swap the P for an E and you get the same 40 mm bore, 55 mm stroke and force class, with the fitted -S magnet still available. The ACP is DIN-standard, so confirm the ISO 21287 mounting dimensions and the M8x1.25 female rod thread against your fixture before swapping, and check the 1/8" PT port on your manifold.
Related AirTAC ACE Cylinders
Request a Quote for the ACED40X55S
Send us the quantity and destination. We confirm price, stock and lead time on the ACED40X55S replacement — usually within 7-8 hours.