This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ20X25-20B, 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 ACPJ20X25-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ20X25-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 25mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X25-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X25-20B
- 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 ACPJ20X25-20B
The ACPJ20X25-20B is a double acting compact cylinder with an adjustable stroke: a stop screw trims the 25 mm extend stroke by up to 20 mm, giving a usable range of 5-25 mm on site. Its male rod thread (the B code) bolts straight to I/Y knuckles. Note that this model is discontinued; the current-production replacement is the ACEJ20X25, same bore, stroke and force class.
Built on the ISO 21287 short-body format, it saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not fit. The hard-anodized aluminium body carries an S45C hard-chrome rod, with fixed TPU bumpers at both ends and M5x0.8 ports. Speed range is 30-500 mm/s over 0.15-1.0 MPa (22-145 psi). No magnet is fitted on this version; order the -S code if you need CMSE / DMSE switch sensing.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X25-20B |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ20X25-20B (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 (Ø20mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 118 N |
| 0.7 MPa | 165 N |
| Max (@1.0 MPa) | 24 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 ACPJ20X25-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 ACPJ20X25-20B Is Used
Small-part divert gates
A 20 mm bore gives enough thrust to swing a light diverter gate on a packaging conveyor, while the short ISO 21287 body fits between guard rails where a profile cylinder cannot.
Lab dosing head press
About 94 N of usable force at 0.5 MPa presses sample caps or dosing heads in test rigs, with the male rod thread picking up a knuckle for aligned straight-line press motion.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20B with the ACEJ20X25-20B
If your load needs under 100.5 N, the bore 16 ACPJ saves space and air; there is no larger bore in this family, so step up to the ACE series for more force. The 25 mm stroke with a 20 mm adjustment window suits fixtures where the exact extend position is set at commissioning - remember the stop screw only shortens the extend stroke and does not hold a load if air is lost. This unit has a male rod thread and no magnet; add the -S code for CMSE / DMSE switches. Since ACPJ is discontinued, confirm ISO 21287 mounting dimensions and order the ACEJ20X25 as the direct successor.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X25-20B
- ✓ 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 ACPJ20X25-20B FAQ
The theoretical maximum is 32 kgf at 1.0 MPa. Ports are M5x0.8, the rod is 10 mm with a male thread, and the extend stroke is adjustable from 5 to 25 mm via the 20 mm window. The model is discontinued - the ACEJ20X25 is the current replacement.
An external stop screw shortens the extend stroke within the ordered 20 mm window, so the rod stops anywhere from 5 mm to the full 25 mm; it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts on air loss. This version has no magnet, so no switch can be mounted - the optional -S magnet code enables CMSE / DMSE switches. Fixed TPU bumpers sit at both ends, and FA flange or LB foot mounts bolt to the ISO 21287 face.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X25-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X25-20B replacement — usually within 7-8 hours.