This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ20X120-30SB, 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 ACPJ20X120-30SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ20X120-30SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X120-30SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X120-30SB
- 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 ACPJ20X120-30SB
The ACPJ20X120-30SB is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke by up to 30 mm on site, giving a usable range of 90-120 mm. It carries the -S magnet option, so CMSE or DMSE reed and solid-state switches can be mounted for end-of-stroke signalling, and the B code gives a male rod thread. Air ports are M5x0.8, sized by the 20 mm bore.
At 0.5 MPa this bore pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. Applying a 0.6 rule of thumb to the push figure, plan on roughly 94 N (about 9.6 kg) of real work per cycle. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and the 120 mm stroke is a non-standard, made-to-order length since bore 20 tops out at 100 mm as standard. Note this ACPJ is discontinued: the current direct is the ACEJ20X120, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-30SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-30SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-30SB |
| Bore size | Ø20 mm |
| Stroke | 120 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 ACEJ20X120-30SB (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 ACPJ20X120-30SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -30 | 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 ACPJ20X120-30SB Is Used
Sample press in laboratory automation
A 20 mm bore pressing vial caps or microplate seals benefits from the compact short body that fits inside enclosed analytical instruments where a full-length profile cylinder cannot.
Carton flap tucking on packaging lines
Running at 30-500 mm/s, the male-threaded rod drives a flap-tuck paddle on a cartoner, and the -S magnet with a DMSE switch confirms each tuck cycle for the line PLC.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-30SB with the ACEJ20X120-30SB
The 30 mm window suits stations where one cylinder must serve parts of slightly different heights; remember the stop screw only shortens the extend stroke and does not hold a load if air is lost. FA/FB flange or LB foot mountings bolt to the standard face, and the male rod thread (B) pairs with I/Y knuckles. Order the ACEJ20X120 as the current-production replacement and verify mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-30SB
- ✓ 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 ACPJ20X120-30SB 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. 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 fluid must be air filtered to 40 um.
The -30 code sets a 30 mm window: a stop screw shortens the 120 mm extend stroke to any length down to 90 mm, with fixed TPU bumpers at both ends. The ACPJ family is discontinued; the current direct is the ACEJ20X120 in the same bore, stroke and force class - confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-30SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-30SB replacement — usually within 7-8 hours.