This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACED50X55SB — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACED50X55SB 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 ACPD50X55SB
The AirTAC Airtac ACPD Double Rod Compact Cylinder ACPD50X55SB is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø50mm bore and 55mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED50X55SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ50 mm
- Stroke55 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM10×1.5
- StatusDiscontinued → ACED50X55SB
- 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 ACPD50X55SB
Double acting with a rod leaving both covers, the ACPD50X55SB delivers 881.2 N in each direction at 0.5 MPa (1233.7 N at 0.7 MPa) because both strokes work on the rod-side area of the 50 mm bore. The 16 mm through-rod resists rotation and side load, gives a symmetric mount, and the rear rod can carry a sensor flag. This unit carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be fitted directly.
The hard-anodized aluminium body follows the ISO 21287 short format, cutting roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and gantries. Fixed TPU bumpers sit at both ends, the male-threaded rod end (B code) takes standard knuckles, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). Note: this model is discontinued - the current-production drop-in is ACED50X55, so confirm ISO 21287 mounting dimensions before swapping. As a rule of thumb, plan on about 529 N of real work at 0.5 MPa, which lifts roughly 45 kg vertically with a 2:1 margin.
Airtac ACPD Double Rod Compact Cylinder ACPD50X55SB Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD50X55SB |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED50X55SB |
| Bore size | Ø50 mm |
| Stroke | 55 mm |
| Acting type | Double acting, double rod |
| Port size | 1/8" |
| Rod thread | M10×1.5 |
| 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 250 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACED50X55SB (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 (Ø50mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 881 N |
| 0.7 MPa | 1234 N |
| Max (@1.0 MPa) | 180 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 ACPD50X55SB
| ACPD | DIN compact cylinder (double-rod, discontinued). |
|---|---|
| 50 | 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 ACPD50X55SB Is Used
Reciprocating transfer carriage
The through-rod drives a pallet slide on a packaging line from either end, with equal 881.2 N force in both directions and CMSE switches tracking position via the -S magnet.
Twin-sided clamping fixture
On a CNC fixture plate, the rear rod clamps while the front rod ejects, both at 1233.7 N at 0.7 MPa, using the male thread for I-type knuckles.
Counterweight guide on a lift assist
The back-end rod balances a 40 kg tool arm in a small assembly cell, where the short ISO 21287 body fits the 55 mm envelope a longer cylinder cannot.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD50X55SB with the ACED50X55SB
At 55 mm stroke this sits well inside the 250 mm maximum standard stroke for the 50 mm bore, so it is a catalog item, not a made-to-order build. If 881.2 N per direction at 0.5 MPa is more than the job needs, the 40 mm bore gives 571.8 N; if you need more, the 63 mm bore reaches 1458.1 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 flanges, LB feet and CA/CB clevises bolt straight to the face, and the -S magnet on this unit accepts CMSE / DMSE switches. For new designs, order the ACED50X55 instead, since ACPD is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACED50X55SB
- ✓ 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 ACPD50X55SB FAQ
Because a rod exits both covers, force is equal both ways: 881.2 N at 0.5 MPa and 1233.7 N at 0.7 MPa, on the rod-side area of the 50 mm bore. Maximum force at 1.0 MPa is 179.7 kgf. Operating range is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, with a 16 mm rod and 1/8" ports.
AirTAC no longer produces the ACPD family. The current drop-in is the ACED50X55 (swap the P for an E), an ISO 21287 compact cylinder in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to the older DIN-standard format.
Related AirTAC ACE Cylinders
Request a Quote for the ACED50X55SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACED50X55SB replacement — usually within 7-8 hours.