This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X40-20, 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 ACPJ16X40-20
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X40-20 is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø16mm bore and 40mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ16X40-20 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ16 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- StatusDiscontinued → ACEJ16X40-20
- 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 ACPJ16X40-20
Double acting and adjustable, the ACPJ16X40-20 is a discontinued DIN-standard compact cylinder with a 16 mm bore, 40 mm stroke and an M5x0.8 port. 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 maximum of 20.5 kgf at 1.0 MPa. A stop screw trims the extend stroke anywhere inside the 20 mm window, so the usable extend range is 20-40 mm, and a fixed TPU bumper sits at both ends.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs, guarding and small gantries. No magnet is fitted on this version; the optional -S code adds one for CMSE / DMSE switches. Production has ended - the current direct is the ACEJ16X40, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X40-20 |
| Bore size | Ø16 mm |
| Stroke | 40 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 ACEJ16X40-20 (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 ACPJ16X40-20
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -20 | 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 ACPJ16X40-20 Is Used
Small-parts press fitting
Trims a 20-40 mm extend stroke to seat bushings or pins in electronics and small appliance assemblies, using about 60 N of practical force at 0.5 MPa.
Compact jig clamping
The short body, roughly half the length of an ISO 15552 profile cylinder, clamps workpieces inside crowded drill and milling fixtures where space is scarce.
Gated indexing on conveyors
With the optional -S magnet and CMSE / DMSE switches, it stops and verifies parts on bottling or packaging lines at speeds from 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20 with the ACEJ16X40-20
The stop screw only shortens the extend stroke - it is not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the standard face, and the optional -S magnet enables CMSE / DMSE sensing. For new builds, order the ACEJ16X40 instead, which matches this bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X40-20
- ✓ 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 ACPJ16X40-20 FAQ
Push is 100.5 N and pull 75.4 N at 0.5 MPa; at 0.7 MPa push reaches 140.7 N and pull 105.6 N, with a theoretical maximum of 20.5 kgf at 1.0 MPa. The 16 mm bore uses an M5x0.8 port and an M4x0.7 female rod thread on an 8 mm rod, the extend stroke is trimmable within the 20 mm window (usable 20-40 mm), operating pressure is 0.15-1.0 MPa (22-145 psi), speed is 30-500 mm/s, and the 75 mm mark is the longest standard stroke for this bore.
An external stop screw shortens the extend stroke by up to 20 mm, giving any extend length from 20 to 40 mm; it cannot lengthen the stroke past the ordered 40 mm and it does not hold a load if air is lost. The ACPJ family is discontinued - the current-production replacement is the ACEJ16X40, a direct in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, since the ACP was built to a DIN standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ16X40-20
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X40-20 replacement — usually within 7-8 hours.