This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACED40X55 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACED40X55 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 ACPD40X55
The AirTAC Airtac ACPD Double Rod Compact Cylinder ACPD40X55 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 ACED40X55 (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 → ACED40X55
- 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 ACPD40X55
A double acting compact cylinder with a rod exiting both covers, the ACPD40X55 delivers 571.8 N in each direction at 0.5 MPa because both strokes work on the rod-side area. The 40 mm bore pushes 800.5 N at 0.7 MPa either way, so there is no weak return stroke. Its hard-anodized aluminium body is an ISO 21287 short build that saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs, guards and gantries.
The through-rod resists rotation and side load and gives a symmetric mount, and the back-end rod can carry a sensor flag. Fixed TPU bumpers decelerate at both ends, speed runs 30-500 mm/s, and pressure spans 0.15-1.0 MPa (22-145 psi). Plan on roughly 29 kg of vertical lift with a 2:1 margin (571.8 N is about 58 kgf). 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 ACPD40X55 Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD40X55 |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED40X55 |
| 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 ACED40X55 (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 ACPD40X55
| 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 ACPD40X55 Is Used
Reciprocating transfer slide
A rod on each cover lets the 40 mm bore push a 5 kg pallet fixture forward at 571.8 N and pull it back with the same force - no derating for the return stroke on a packaging line shuttle.
Rotating sensor-flag actuator
Mount a flag on the back-end rod of a rotary indexing table so a CMSE or DMSE switch (with the optional -S magnet) confirms mid-stroke position while the front rod does the clamping work.
Symmetric press-in station
The through-rod resists side load when pressing bushings into an electronics housing, and the short ISO 21287 body fits inside the guard where a full-length cylinder will not.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD40X55 with the ACED40X55
At 55 mm stroke this sits well inside the 200 mm standard range for bore 40, so no made-to-order stroke is needed. If 571.8 N at 0.5 MPa is more than the job needs, the 32 mm bore gives 345.6 N; if the load is heavier, step up to 50 mm for 881.2 N. Remember a plain double-rod cylinder drifts when air is lost - add a rod lock or pilot check if the load must stay put. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and the optional -S magnet enables CMSE / DMSE switches (this code has no magnet fitted). Order the ACED40X55 as the current-production replacement.
Replacement checklist
- ✓ Current-production ACE → ACED40X55
- ✓ 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 ACPD40X55 FAQ
Because a rod exits both covers, force is equal both ways: 571.8 N at 0.5 MPa and 800.5 N at 0.7 MPa, on the rod-side area. Maximum output at 1.0 MPa is 116.6 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, with a fixed TPU bumper at each end.
Order the ACED40X55: swap the P for an E and you get the current-production ISO 21287 compact cylinder in the same 40 mm bore, 55 mm stroke and force class. The ACP family is DIN-standard, so confirm the ISO 21287 mounting dimensions and FA/FB or LB mounting hole pattern against your fixture before swapping.
Request a Quote for the ACED40X55
Send us the quantity and destination. We confirm price, stock and lead time on the ACED40X55 replacement — usually within 7-8 hours.