This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X125-50, 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 ACPJ16X125-50
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X125-50 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 ACEJ16X125-50 (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 → ACEJ16X125-50
- 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 ACPJ16X125-50
The ACPJ16X125-50 is a double acting compact cylinder with an adjustable extend stroke: the -50 code gives a 50 mm stop-screw window, so the 125 mm stroke can be trimmed anywhere down to 75 mm on site. This 125 mm stroke is longer than the 75 mm maximum standard stroke for a 16 mm bore, so it is a made-to-order build. Note that the ACPJ family is discontinued; the current-production replacement is the ACEJ16X125, so confirm ISO 21287 mounting dimensions before swapping.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, the fixed TPU bumper pads both ends, and the hard-anodized aluminium body carries an S45C hard-chrome rod with a female M4x0.7 thread. Speed range is 30-500 mm/s over 0.15-1.0 MPa (22-145 psi).
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X125-50 |
| 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 ACEJ16X125-50 (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 ACPJ16X125-50
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -50 | 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 ACPJ16X125-50 Is Used
Compact jig ejector
In a tight drilling jig where a full-length ISO 15552 profile cylinder will not fit, the short body plus LB foot mounting ejects finished parts at up to 500 mm/s.
Small carton hold-down
About 60 N of usable force at 0.5 MPa holds lightweight cartons or trays steady during taping or labelling, with the stop screw set to the exact pack height.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50 with the ACEJ16X125-50
The stop screw trims the extend stroke only within the 50 mm window; it is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Mounting uses FA/FB flanges or LB feet on the ISO 21287 face. This unit has no magnet; order the ACPJ16X125-50S if you need CMSE / DMSE switches. Replacement: ACEJ16X125.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X125-50
- ✓ 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 ACPJ16X125-50 FAQ
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; theoretical maximum is 20.5 kgf at 1.0 MPa. The -50 code is a 50 mm adjustment window: a stop screw shortens the 125 mm extend stroke to any value down to 75 mm. The 125 mm stroke is non-standard for a 16 mm bore (75 mm max standard) and is made to order. Port is M5x0.8, rod thread is female M4x0.7.
No - the ACPJ family is discontinued. The current-production direct is the ACEJ16X125 in the same bore, stroke and force class; confirm ISO 21287 mounting dimensions before swapping. For sensing, the magnet is the optional -S code: order ACPJ16X125-50S to enable CMSE or DMSE switches. This version without -S has no magnet, so no switch can be mounted.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ16X125-50
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X125-50 replacement — usually within 7-8 hours.