This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X125-40, 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 ACPJ Adjustable Compact Cylinder ACPJ16X125-40
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X125-40 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 ACEJ16X125-40 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ16 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- StatusDiscontinued → ACEJ16X125-40
- 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 ACPJ Adjustable Compact Cylinder ACPJ16X125-40
This AirTAC ACPJ16X125-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 125 mm stroke by up to 40 mm, giving a usable range of 85-125 mm on site. Note that the 125 mm stroke exceeds the 75 mm maximum standard stroke for this bore, so it is a made-to-order build. The model is discontinued; the current-production replacement is the ACEJ16X125 in the same bore, stroke and force class.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and gantries where a full-length body will not fit. FA/FB flange and LB foot mounts bolt straight to the standard face, and the fixed TPU bumpers at both ends simply decelerate the piston - they never lock or hold a load. Confirm the ISO 21287 mounting dimensions before swapping to the ACEJ16X125.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X125-40 |
| 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 ACEJ16X125-40 (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 (Ø16mm)
| 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).
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -40 | 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).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40 Is Used
Fixture height matching
The 40 mm trim window lets one 16 mm cylinder serve jig nests of varying part heights, cutting the 125 mm extend stroke down to 85 mm without changing hardware.
Guarded pick stations (with -S build)
Ordered with the optional -S magnet, CMSE or DMSE switches confirm end positions inside the short body that fits where an ISO 15552 profile cylinder cannot.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40 with the ACEJ16X125-40
If your fixture needs position feedback, remember this code has no magnet - order the -S variant to enable CMSE / DMSE switches. The 40 mm window suits stations where one cylinder serves parts of slightly different heights; the stop shortens the extend stroke only, it does not lengthen it past 125 mm, and on air loss the piston still drifts. For new builds, specify the ACEJ16X125 instead, confirming ISO 21287 mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X125-40
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40 FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa push rises to 140.7 N and pull to 105.6 N. Theoretical maximum is 20.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8 with an M4x0.7 female rod thread.
The -40 code sets a 40 mm window: an external stop screw shortens the extend stroke anywhere between 85 and 125 mm. It is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. This ACPJ is discontinued; the current direct is the ACEJ16X125 (swap P for E) in the same bore, stroke and force class - confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ16X125-40
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X125-40 replacement — usually within 7-8 hours.