This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X45-20B, 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 ACPJ12X45-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X45-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 45mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X45-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke45 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X45-20B
- 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 ACPJ12X45-20B
Double acting and adjustable in stroke, this discontinued ACPJ12X45-20B pairs a 12 mm bore with a 45 mm stroke and a 20 mm trim window: an external stop screw shortens the extend stroke on site to anywhere in a 25-45 mm range, so one cylinder serves several jig positions. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N push at 0.7 MPa, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. The male rod thread (B code) bolts straight to I/Y knuckles on the ISO 21287 face.
The short ISO 21287 body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits cramped guards and slide fixtures. As a working figure, plan on about 34 N of real push at 0.5 MPa (roughly 0.6 of the rating), which lifts about 1.7 kg vertically - or about 0.9 kg with a 2:1 margin. This model is discontinued; the current-production drop-in is ACEJ12X45, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X45-20B |
| Bore size | Ø12 mm |
| Stroke | 45 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ12X45-20B (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 (Ø12mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 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 ACPJ12X45-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 ACPJ12X45-20B Is Used
Micro part ejection from a press die
The 25-45 mm trim range lets one cylinder eject stamped terminals of different widths, with 56.5 N at 0.5 MPa enough for light-gauge strip.
Clamping small PCB test fixtures
Male rod thread plus an I/Y knuckle grips an angled fixture; about 34 N of usable push holds boards during a bed-of-nails test cycle.
Lifting sensor caps on a packaging line
With a 2:1 margin the rod raises about 0.9 kg vertically, matching plastic caps or small blisters at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20B with the ACEJ12X45-20B
At 12 mm bore this is the lightest force step: 56.5 N push at 0.5 MPa. If the load needs more, the 16 mm bore delivers 100.5 N at the same pressure. No smaller bore exists in the family, so step down in stroke instead. This unit has no magnet - the optional -S code is what enables CMSE / DMSE switches, so order that variant if position sensing is planned. The stop screw trims the extend stroke only; on air loss the piston still drifts, so it is not a load-holding device. Replacement: ACEJ12X45.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X45-20B
- ✓ 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 ACPJ12X45-20B FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The bore is 12 mm, stroke 45 mm with a 20 mm adjustment window (usable 25-45 mm), rod 6 mm with male thread, port M5x0.8, speed 30-500 mm/s, pressure 0.15-1.0 MPa (22-145 psi).
No - the ACPJ family is discontinued. The current-production replacement is ACEJ12X45, an ISO 21287 compact cylinder in the same bore, stroke and force class. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions before swapping. Also note this unit has no magnet; only the -S variant accepts CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X45-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X45-20B replacement — usually within 7-8 hours.