This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ20X25-20SB, 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 ACPJ20X25-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ20X25-20SB 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 ACEJ20X25-20SB (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 → ACEJ20X25-20SB
- 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 ACPJ20X25-20SB
The ACPJ20X25-20SB is a double acting, adjustable-stroke compact cylinder with a 20 mm bore and 25 mm stroke. An external stop screw trims the extend stroke anywhere in the ordered 20 mm window, giving a usable range of 5-25 mm on site. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. The male rod thread (B code) and the fitted -S magnet for CMSE / DMSE switches are both built into this code. Note: the ACPJ family is discontinued; the current-production direct is the ACEJ20X25.
The short ISO 21287-class body 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. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, temperature -20 to +70 C. Confirm ISO 21287 mounting dimensions before swapping from the DIN-standard ACP footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X25-20SB |
| 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 ACEJ20X25-20SB (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 ACPJ20X25-20SB
| 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 ACPJ20X25-20SB Is Used
Position-checked ejector
With the fitted -S magnet and CMSE switches, the 25 mm stroke signals part-ejected on a small electronics assembly station, while the stop screw dials the throw down to 5 mm for shallow trays.
Carton push-off on packing benches
About 94 N of usable push at 0.5 MPa is enough to nudge folded cartons or blisters off a conveyor lane on a manual packing bench, with the male rod thread taking an I or Y knuckle.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X25-20SB with the ACEJ20X25-20SB
Size the job both ways before ordering. If your load needs more than about 94 N of real work at 0.5 MPa, stay at 20 mm; for heavier duty, move up to the ACE 32 mm class. The stop screw only shortens the extend stroke within the 20 mm window - it is a mechanical end stop, not a mid-stroke lock, so the rod will drift if air is lost and it must never be relied on to hold a load. This code carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be mounted for end-of-stroke signalling, and the B code gives a male rod thread. Mounting: FA/FB flange or LB foot on the ISO 21287 face. Since the ACPJ is discontinued, order the ACEJ20X25 as the current direct and verify the mounting dimensions against your fixture first.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X25-20SB
- ✓ 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 ACPJ20X25-20SB FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N. The theoretical maximum is 32 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, and the port is M5x0.8.
Order the ACEJ20X25, the current-production ISO 21287 replacement: swap the P for an E and you get the same 20 mm bore, 25 mm stroke and force class as a direct. Because the ACP was DIN-standard, confirm the ISO 21287 mounting dimensions against your fixture before swapping. On the adjuster: the -20 code is a 20 mm window, so the stop screw shortens the 25 mm extend stroke to anywhere between 5 and 25 mm. It is a mechanical end stop only - it never lengthens the stroke and never holds a load if air is lost.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X25-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X25-20SB replacement — usually within 7-8 hours.