This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ20X20-20B, 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 ACPJ20X20-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ20X20-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X20-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X20-20B
- 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 ACPJ20X20-20B
The ACPJ20X20-20B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 20 mm stroke by up to 20 mm on site, giving a usable range of 0-20 mm. Its short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures a full-length body cannot reach.
The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and the B code gives a male 10 mm rod thread with M6x1.0. Note this model is discontinued: the current direct is ACEJ20X20, so confirm ISO 21287 mounting dimensions before swapping from the DIN-standard ACP footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X20-20B |
| Bore size | Ø20 mm |
| Stroke | 20 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 ACEJ20X20-20B (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 ACPJ20X20-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 ACPJ20X20-20B Is Used
Short-stroke part kickers
A 20 mm stroke at 30-500 mm/s deflects small parts off a packaging conveyor lane; the compact body fits where an ISO 15552 profile cylinder is too long by half.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20B with the ACEJ20X20-20B
The 20 mm adjustment window suits jigs where the final clamping point is set during commissioning, but remember the stop screw only shortens the extend stroke and does not hold a load if air is lost. FA/FB flange and LB foot mountings bolt to the ISO 21287 face; the optional -S magnet (not fitted on this B-code model as ordered) enables CMSE / DMSE switches. For new builds, order the ACEJ20X20 instead - this ACPJ is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X20-20B
- ✓ 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 ACPJ20X20-20B 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; theoretical maximum is 32 kgf at 1.0 MPa. The -20 code is a 20 mm adjustment window: the stop screw shortens the 20 mm extend stroke by up to 20 mm, so the usable range is 0-20 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, port M5x0.8, male rod thread M6x1.0.
Order the ACEJ20X20, the current-production ISO 21287 successor: swap the P for an E and you get the same 20 mm bore, 20 mm stroke and force class in a matching short body. Because the ACPJ was built to a DIN-standard footprint, confirm the ISO 21287 mounting dimensions against your fixture before swapping. If you need position sensing, order the ACEJ with the -S magnet code so CMSE / DMSE switches can be fitted.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X20-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X20-20B replacement — usually within 7-8 hours.