This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACE50X85SB, 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 ACP50X85SB
The AirTAC ACP Compact Cylinder ACP50X85SB 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 ACE50X85SB (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 → ACE50X85SB
- 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 ACP50X85SB
A double acting compact cylinder with a 50 mm bore and 85 mm stroke, the ACP50X85SB pushes with 981.7 N and pulls with 881.2 N at 0.5 MPa, rising to 1374.4 N on push at 0.7 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 clamping fixtures where a full-length body cannot. The hard-anodized aluminium body carries an S45C hard-chrome 16 mm rod, and the male rod thread (B code) bolts straight to standard rod knuckles.
Because the S code is in this model, the optional -S magnet is fitted, so CMSE or DMSE reed and solid-state switches can be mounted directly on the body for end-of-stroke feedback. Note this model is discontinued: the current-production direct is the ACE50X85, which matches the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping.
Airtac ACP Compact Cylinder ACP50X85SB Technical Specifications
| Model | Airtac ACP Compact Cylinder ACP50X85SB |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE50X85SB |
| 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 ACE50X85SB (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 ACE50X85SB 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 ACP50X85SB
| 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 ACP50X85SB Is Used
Press-fit bushings into housings
The 981.7 N push at 0.5 MPa is enough to seat small bearings and bushings in automotive sub-assembly presses, with the 85 mm stroke covering load-and-press in one cycle.
Pallet-stacker clamp arms
Warehouse clamp attachments use the 50 mm bore's roughly 60 kg of usable push to grip shrink-wrapped loads, with the short body fitting inside the mast profile.
Indexing table lock-up
On rotary machining fixtures, the 881.2 N pull force retracts a locking pin against a hard stop, and CMSE switches on the -S magnet confirm full lock before the cycle starts.
Replacing the Airtac ACP Compact Cylinder ACP50X85SB with the ACE50X85SB
At 85 mm stroke this sits comfortably inside the 250 mm maximum standard stroke for the 50 mm bore, so no made-to-order length is needed. If 981.7 N at 0.5 MPa is more than your load needs, the 40 mm bore (628.3 N push) is the smaller step; if you need more, the 63 mm bore delivers 1558.6 N. Remember a plain unit of this type drifts when air is lost - add a rod lock or pilot check valve if the load must stay put. Choose FA/FB flange, LB foot or CA/CB clevis mounting to suit the fixture, and keep the S code if switch feedback is required. For new projects, order the ACE50X85 instead, as this ACP version is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACE50X85SB
- ✓ 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 ACP50X85SB FAQ
At 0.5 MPa it pushes with 981.7 N and pulls with 881.2 N; at 0.7 MPa those rise to 1374.4 N and 1233.7 N. The theoretical maximum at 1.0 MPa is 200.2 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, speed range 30-500 mm/s, and air filtered to 40 um.
The ACP50X85SB is discontinued; the current-production successor is the ACE50X85, which keeps the same 50 mm bore, 85 mm stroke and force class in an ISO 21287 short body - verify the mounting dimensions against your fixture before swapping, since the ACP was built to a DIN standard. This unit already carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches mount directly on the body. Mounting options include FA/FB flange, LB foot and CA/CB clevis, and the male rod thread accepts standard I/Y knuckles.
Related AirTAC ACE Cylinders
Request a Quote for the ACE50X85SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACE50X85SB replacement — usually within 7-8 hours.