This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X120-40, 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 ACPJ16X120-40
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X120-40 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 ACEJ16X120-40 (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 → ACEJ16X120-40
- 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 ACPJ16X120-40
The ACPJ16X120-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke by up to 40 mm on site, giving a usable range of 80-120 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N, and at 0.7 MPa those rise to 140.7 N and 105.6 N. The 120 mm stroke is longer than the 75 mm standard maximum for a 16 mm bore, so this unit is made to order. The ACPJ family is discontinued; the current-production direct is the ACEJ16X120, so confirm ISO 21287 mounting dimensions before swapping.
Its short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters in slim gantries and guarded stations. The fixed TPU bumper at both ends only decelerates the piston; it never locks or holds a load, so on air loss the rod can drift. FA/FB flanges and LB feet bolt to the standard face, and the optional -S magnet enables CMSE / DMSE switches - this code has no S, so no magnet is fitted.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X120-40 |
| 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 ACEJ16X120-40 (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 ACPJ16X120-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×120 | 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 ACPJ16X120-40 Is Used
End-of-stroke verification on test rigs
Order the -S version to add CMSE / DMSE switches and confirm the trimmed extend position on a leak-test fixture; this code without S has no magnet, so no sensor can be mounted.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X120-40 with the ACEJ16X120-40
Size both ways: if 100.5 N at 0.5 MPa is marginal, step up to the 20 mm bore for 157.1 N; if you need less force and a shorter body, the 12 mm bore gives 56.5 N. Remember the adjuster is a mechanical end stop for the extend stroke, not a mid-stroke lock - do not use it to hold a load against air loss. Match FA/FB flange or LB foot hardware to your fixture, and order the -S code if you need CMSE / DMSE position switches. For new designs, specify the ACEJ16X120 instead, since this ACPJ model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X120-40
- ✓ 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 ACPJ16X120-40 FAQ
Push is 100.5 N and pull 75.4 N at 0.5 MPa; at 0.7 MPa push is 140.7 N and pull 105.6 N, with a theoretical maximum of 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, temperature -20 to +70 C, fluid air filtered to 40 um, and the port is M5x0.8 with an M4x0.7 female rod thread. The 120 mm stroke exceeds the 75 mm standard maximum for a 16 mm bore, so it is made to order.
The -40 code sets a 40 mm window: an external stop screw shortens the 120 mm extend stroke to any length down to 80 mm, and the fixed TPU bumpers at both ends simply decelerate the piston - they never brake or hold a load. The ACPJ family is discontinued; the current-production direct is the ACEJ16X120 (swap the P for an E) in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, because the ACP was built to a DIN-standard footprint.
Related AirTAC ACE Cylinders
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