This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ16X40-20B, 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 ACPJ16X40-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ16X40-20B 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 ACEJ16X40-20B (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 → ACEJ16X40-20B
- 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 ACPJ16X40-20B
A double acting compact cylinder with an adjustable extend stroke, the ACPJ16X40-20B uses a 16 mm bore and a 40 mm basic stroke that an external stop screw trims by up to 20 mm, giving a usable range of 20-40 mm. 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, so it slots into tight fixtures and guarding. The rod end is male thread (the B code) and the air port is M5x0.8.
This model is discontinued; the current-production replacement is the ACEJ16X40, which matches the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping. Plan real work at about 60 N (0.6 of the push rating) at 0.5 MPa, which lifts roughly 5 kg vertically with a 2:1 margin. Air is filtered to 40 um, pressure runs 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and a fixed TPU bumper sits at both ends. The magnet is the optional -S code only; this version has none, so no CMSE / DMSE switch can be fitted.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X40-20B |
| 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 ACEJ16X40-20B (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 ACPJ16X40-20B
| 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 ACPJ16X40-20B Is Used
Fixture clamping on small CNC jigs
The 20-40 mm trimmed stroke clamps small machined parts in a drill or milling fixture, with about 60 N of usable force at 0.5 MPa enough for light clamping fingers.
Bottle and carton press-check station
On a packaging line, the stop screw sets an exact 20-40 mm press travel to seat caps or fold tabs, and the short body fits inside a compact guard.
Ejector on an electronics test bench
With the -S magnet ordered, CMSE or DMSE switches flag end positions as the rod pushes PCB trays off a test nest at up to 500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X40-20B with the ACEJ16X40-20B
If 100.5 N of push at 0.5 MPa is marginal for the job, step up to the 20 mm bore for 157.1 N; if the load is light and space is very tight, the 12 mm bore gives 56.5 N. Size the stop so the trimmed stroke still clears the part - the adjuster shortens the extend stroke only and never lengthens it past 40 mm. Remember the stop is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve for suspended loads. FA/FB flange and LB foot mountings bolt to the standard face; order the -S code if CMSE / DMSE switching is needed. For new builds, specify the ACEJ16X40 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X40-20B
- ✓ 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 ACPJ16X40-20B 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 -20 code gives a 20 mm adjustment window, so the stop screw can trim the 40 mm extend stroke anywhere down to 20 mm. It runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um at 30-500 mm/s, with a fixed TPU bumper at both ends. This model is discontinued - the ACEJ16X40 is the current drop-in.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA/FB flange or LB foot mountings bolt straight to the standard face. Position switching needs the optional -S magnet ordered with the cylinder; without -S there is no magnet and no CMSE / DMSE switch can be mounted. Rod end here is male thread (B code) with an M5x0.8 port.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ16X40-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ16X40-20B replacement — usually within 7-8 hours.