This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X125-10, 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.

The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X125-10 is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø16mm bore and 125mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ16X125-10 (ISO 21287 ACE), in the same bore, stroke and force class.
This double acting ACPJ16X125-10 is a DIN-standard compact cylinder with a 16 mm bore and a 125 mm stroke, trimmed by a 10 mm adjustment window: a stop screw shortens the extend stroke on site to any length from 115 mm to 125 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa those rise to 140.7 N and 105.6 N, with a theoretical ceiling of 20.5 kgf at 1.0 MPa. Note the 125 mm stroke exceeds the 75 mm standard limit for bore 16, so this is a made-to-order build. The ACPJ family is discontinued - the current-production direct is the ACEJ16X125 in the same bore, stroke and force class.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into narrow fixtures and machine guards. The hard-anodized aluminium body carries an S45C hard-chrome rod with a female M4x0.7 thread, fixed TPU bumpers sit at both ends, and no magnet is fitted - the optional -S code is what enables CMSE / DMSE switch sensing. Operating range is 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s.
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-10 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X125-10 |
| Bore size | Ø16 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ16X125-10 (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.
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 75 N |
| 0.7 MPa | 106 N |
| Max (@1.0 MPa) | 15 kgf |
ACPJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -10 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| 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).
The short body fits the tight envelope beside a cartoning head where a full-length profile cylinder will not, and the 125 mm stroke swings a product gate clear of the lane at 30-500 mm/s.
A 75.4 N pull at 0.5 MPa retracts a sample tray into its home position, and the female M4x0.7 rod thread takes a knuckle or bracket directly for the linkage.
Bore 16 delivers 100.5 N at 0.5 MPa. Step down to bore 12 (56.5 N) for lighter clamping, or up to bore 20 (157.1 N) when the load grows. The adjuster is a mechanical end stop for the extend stroke only - it does not hold a load if air is lost. Match FA/FB flange or LB foot mounts to your fixture, and if position feedback matters, order the -S variant so CMSE / DMSE switches can be fitted. For new designs, specify the ACEJ16X125 instead and confirm ISO 21287 mounting dimensions before swapping.
Replacement checklist
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa it pushes 140.7 N and pulls 105.6 N; the theoretical maximum is 20.5 kgf at 1.0 MPa. The -10 code gives a 10 mm adjustment window, so the 125 mm extend stroke can be trimmed anywhere in a 115-125 mm range by the external stop screw. This is a made-to-order stroke since bore 16 tops out at 75 mm as a standard length.
It is a short-body compact cylinder whose mounting length is about 50% less than an ISO 15552 profile cylinder of the same bore, with M5x0.8 ports and FA/FB flange or LB foot mounting options. The ACPJ series is discontinued; the current direct is the ACEJ16X125, which matches the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping. If you need switch sensing, the replacement must carry the optional -S magnet for CMSE / DMSE switches.
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X125-10 replacement — usually within 7-8 hours.