This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X125-50SB, 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 ACPJ16X125-50SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X125-50SB 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 ACEJ16X125-50SB (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 → ACEJ16X125-50SB
- 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 ACPJ16X125-50SB
The ACPJ16X125-50SB is a double acting compact cylinder with an adjustable extend stroke: the -50 stop screw trims the 125 mm stroke down to as short as 75 mm on site. This 16 mm bore unit is discontinued; the current-production drop-in is the ACEJ16X125 in the same bore, stroke and force class. The 125 mm stroke exceeds the 75 mm maximum standard stroke for bore 16, so it is a made-to-order build.
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 20.5 kgf at 1.0 MPa. The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, and the male rod thread (B code) plus the fitted -S magnet for CMSE / DMSE switches make it easy to drop into sensor-equipped fixtures. Plan on about 60 N of real work at 0.5 MPa, which lifts roughly 5 kg vertically with a 2:1 margin. Fixed TPU bumpers sit at both ends, speed runs 30-500 mm/s, and pressure spans 0.15-1.0 MPa (22-145 psi).
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X125-50SB |
| 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 ACEJ16X125-50SB (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 ACPJ16X125-50SB
| 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 ACPJ16X125-50SB Is Used
Fixture clamping on CNC pallets
The 100.5 N push at 0.5 MPa clamps small aluminium or plastic workpieces, and the 75-125 mm adjustable window lets one cylinder serve pallets of different heights.
Position-verified ejector on assembly lines
The fitted -S magnet accepts CMSE / DMSE switches, so a PLC can confirm full extension before the next station cycles.
Compact press for connector insertion
About 60 N of usable force at 0.5 MPa presses pins and terminals in electronics assemblies where a full-length cylinder will not fit.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-50SB with the ACEJ16X125-50SB
Size between bores: a 12 mm bore gives 56.5 N push at 0.5 MPa, while a 20 mm bore reaches 157.1 N - pick the 16 mm when your load sits between those. The adjuster is a mechanical end stop for the extend stroke only, not a mid-stroke lock, so the piston can drift if air is lost; do not use it to hold a load. Mounting options include FA/FB flange and LB foot on the ISO 21287 face, and the male rod thread suits I/Y knuckles directly. Before ordering, confirm the ISO 21287 mounting dimensions and switch to the ACEJ16X125, the current replacement for this discontinued model.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X125-50SB
- ✓ 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 ACPJ16X125-50SB FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa, 140.7 N push and 105.6 N pull; theoretical maximum is 20.5 kgf at 1.0 MPa. The -50 code sets a 50 mm adjustment window: an external stop screw shortens the 125 mm extend stroke to any length down to 75 mm. It is a stop, not a load-holding brake - on air loss the piston can still drift.
It is discontinued; the current-production replacement is the ACEJ16X125 (same bore, stroke and force class) - confirm ISO 21287 mounting dimensions before swapping. The body is hard-anodized aluminium with an S45C hard-chrome rod, fixed TPU bumpers at both ends, M5x0.8 ports, a male rod thread, and the -S magnet fitted for CMSE / DMSE switches. Speed is 30-500 mm/s; the 125 mm stroke is a made-to-order length.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ16X125-50SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X125-50SB replacement — usually within 7-8 hours.