This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X120-50S, 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 ACPJ16X120-50S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X120-50S is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø16mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ16X120-50S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ16 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- StatusDiscontinued → ACEJ16X120-50S
- 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 ACPJ16X120-50S
The ACPJ16X120-50S is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke by up to 50 mm, giving a usable range of 70-120 mm on site. At 0.5 MPa the 16 mm bore delivers 100.5 N push and 75.4 N pull, rising to 140.7 N push at 0.7 MPa. The 120 mm stroke exceeds the 75 mm standard maximum for bore 16, so this unit is made to order. This model is discontinued; the current-production replacement is the ACEJ16X120, so confirm ISO 21287 mounting dimensions before swapping.
Its short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which matters in tight jigs, guards and gantries. The -S code on this model means the magnet is fitted, so CMSE / DMSE reed or solid-state switches can be mounted directly on the hard-anodized aluminium body. For sizing, plan on about 60 N of real work at 0.5 MPa (roughly 0.6 of the push rating), which lifts about 5 kg vertically with a 2:1 margin. A fixed TPU bumper sits at both ends and the rod carries a female M4x0.7 thread.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-50S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-50S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X120-50S |
| Bore size | Ø16 mm |
| Stroke | 120 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 ACEJ16X120-50S (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 ACPJ16X120-50S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×120 | 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 ACPJ16X120-50S Is Used
Multi-part jig clamping
The 70-120 mm adjustable range lets one fixture handle several bracket lengths, with 100.5 N push at 0.5 MPa enough for light aluminum or plastic parts.
Switched ejection station
With the -S magnet fitted, CMSE / DMSE switches confirm extend and retract on a small electronics-assembly ejector running at 30-500 mm/s.
Packaging line part pusher
A 120 mm made-to-order stroke pushes cartons or trays sideways off a conveyor, where the short body fits under low guarding that a full-length cylinder cannot.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-50S with the ACEJ16X120-50S
Size the bore by load: the 12 mm bore gives only 56.5 N push at 0.5 MPa, while the 20 mm bore reaches 157.1 N, so 16 mm at 100.5 N sits in the middle for light clamping and indexing. The 50 mm window suits stations where one cylinder serves several part lengths; note the stop screw only shortens the extend stroke and drifts on air loss, so it is not a load-holding lock. FA/FB flange and LB foot mountings bolt to the standard face, and the fitted -S magnet accepts CMSE / DMSE switches. Order the ACEJ16X120 as the current drop-in and verify ISO 21287 dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X120-50S
- ✓ 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 ACPJ16X120-50S FAQ
Push is 100.5 N and pull 75.4 N at 0.5 MPa; at 0.7 MPa push rises to 140.7 N and pull to 105.6 N, with a theoretical maximum of 20.5 kgf at 1.0 MPa. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, port M5x0.8, female M4x0.7 rod thread, fixed TPU bumpers both ends. The 120 mm stroke is non-standard for bore 16 (75 mm max standard) and made to order.
The -50 code is a 50 mm window: an external stop screw shortens the extend stroke anywhere between 70 and 120 mm, but it never lengthens the stroke past 120 mm and it does not hold a load if air is lost. The ACPJ family is discontinued; the current-production drop-in is the ACEJ16X120 in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, since the ACPJ follows the older DIN-standard footprint.
Related AirTAC ACE Cylinders
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