This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACE50X85, 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 ACP Compact Cylinder ACP50X85
The AirTAC ACP Compact Cylinder ACP50X85 is a double acting DIN-standard tight/compact air cylinder with a Ø50mm bore and 85mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACE50X85 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ50 mm
- Stroke85 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.5
- StatusDiscontinued → ACE50X85
- 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 ACP Compact Cylinder ACP50X85
A double acting compact cylinder in the DIN-standard ACP series, the ACP50X85 pairs a 50 mm bore with an 85 mm stroke on a hard-anodized aluminium body and an S45C hard-chrome 16 mm rod. At 0.5 MPa it pushes 981.7 N and pulls 881.2 N; at 0.7 MPa push rises to 1374.4 N, with a theoretical ceiling of 200.2 kgf at 1.0 MPa. Its short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs, guards and gantries.
Fixed TPU bumpers sit at both ends, speed runs 30-500 mm/s, and the rod end carries a female M10x1.5 thread with a 1/8" PT port. Note this model is discontinued: the current-production direct is the ACE50X85, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACP Compact Cylinder ACP50X85 Technical Specifications
| Model | Airtac ACP Compact Cylinder ACP50X85 |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE50X85 |
| Bore size | Ø50 mm |
| Stroke | 85 mm |
| Acting type | Double acting |
| 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 ACE50X85 (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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 kgf | |
The ACE50X85 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACP Compact Cylinder ACP50X85
| ACP | DIN compact cylinder (double-acting, discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×85 | 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 ACP Compact Cylinder ACP50X85 Is Used
Press-fit bushings into housings
With 981.7 N of push at 0.5 MPa, the 85 mm stroke seats bronze or steel bushings in pump and gearbox housings on a bench fixture, where the short body fits under a low press frame.
Clamping machined aluminium brackets
On a CNC secondary-op fixture, the cylinder clamps cast brackets against a hard stop; the 50 mm bore holds parts through drilling without distorting thin walls.
Replacing the Airtac ACP Compact Cylinder ACP50X85 with the ACE50X85
At 981.7 N push at 0.5 MPa, the 50 mm bore sits mid-range: step down to the 40 mm bore (628.3 N) for lighter clamping, or up to 63 mm (1558.6 N) when the load grows. The 85 mm stroke is well inside the 250 mm standard limit for this bore, so it ships as a standard build. If the load must stay put when air drops, add a rod lock or pilot check valve - the bumper alone never holds position. FA/FB flange, LB foot and CA/CB clevis mountings bolt straight on, and ordering the -S code adds the optional magnet for CMSE / DMSE switches. For new projects, specify the ACE50X85 instead and verify the ISO 21287 footprint.
Replacement checklist
- ✓ Current-production ACE → ACE50X85
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACP Compact Cylinder ACP50X85 FAQ
Push is 981.7 N and pull 881.2 N at 0.5 MPa; at 0.7 MPa push reaches 1374.4 N and pull 1233.7 N, with a theoretical maximum of 200.2 kgf at 1.0 MPa. It is a double acting compact cylinder, 50 mm bore, 85 mm stroke, 16 mm rod with female M10x1.5 thread, 1/8" PT port, operating on 0.15-1.0 MPa (22-145 psi) of filtered air, proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with fixed TPU bumpers at both ends.
AirTAC no longer produces the ACP family. The current-production replacement is the ACE50X85, an ISO 21287 compact cylinder in the same bore, stroke and force class. It drops into the same mounting family (FA/FB flange, LB foot, CA/CB clevis), but because the ACP followed a DIN-standard build, confirm the ISO 21287 mounting dimensions against your fixture before swapping. If you need position sensing, order the ACE with the -S magnet code for CMSE / DMSE switches.
Request a Quote for the ACE50X85
Send us the quantity and destination. We confirm price, stock and lead time on the ACE50X85 replacement — usually within 7-8 hours.