This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X75-20B, 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 ACPJ12X75-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X75-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 75mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X75-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke75 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X75-20B
- 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 ACPJ12X75-20B
The ACPJ12X75-20B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 75 mm stroke by up to 20 mm, giving a usable range of 55-75 mm on site. This 12 mm bore size delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The 75 mm stroke exceeds the 50 mm standard maximum for bore 12, so it is a made-to-order build. Note: the ACPJ family is discontinued; the current-production replacement is the ACEJ12X75.
Its short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits cramped slide assemblies and small test rigs. The male rod thread (B code) bolts directly to I/Y knuckles, and a fixed TPU bumper sits at each end. In practice, plan on about 34 N of real work at 0.5 MPa (roughly 60% of the rated push), which lifts about 1.7 kg vertically - halve that for a 2:1 margin on a pick-and-place arm. Confirm ISO 21287 mounting dimensions before swapping to the ACEJ12X75.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X75-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X75-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X75-20B |
| Bore size | Ø12 mm |
| Stroke | 75 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 ACEJ12X75-20B (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 ACPJ12X75-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×75 | 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 ACPJ12X75-20B Is Used
Compact lab test station
The 55-75 mm adjustable range and 56.5 N push at 0.5 MPa suit a benchtop leak-test press that clamps small sensor housings inside a tight guard.
Micro-part ejection on a rotary table
With about 1.7 kg of vertical lift capability at 0.5 MPa, this cylinder ejects finished watch or connector components from a dial-plate nest as the table indexes.
Small-bottle gating on a filling line
The male rod thread drives a light gate arm that diverts 30 ml vials between two conveyor lanes, with the stop screw tuned to the lane width.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X75-20B with the ACEJ12X75-20B
Size this bore by force: at 0.5 MPa the 12 mm bore pushes 56.5 N, while a 16 mm bore reaches 100.5 N and a 20 mm bore 157.1 N. If your mechanism needs more than about 34 N of usable thrust, step up a bore size rather than raising pressure. The -20 window means the stop screw can only shorten the stroke within 55-75 mm - it cannot extend past 75 mm, and it is not a mid-stroke lock, so the rod still drifts if air is lost. This version has a male rod thread and PT ports; no magnet is fitted, so order the -S code if you later need CMSE / DMSE switch positions. For new designs, specify the ACEJ12X75 instead - same bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X75-20B
- ✓ 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 ACPJ12X75-20B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; the theoretical maximum is 11.5 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window, so the stop screw trims the 75 mm stroke down to 55 mm. It runs double acting on 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s, with M5x0.8 ports and a 6 mm male-thread rod. This 75 mm stroke is made to order, since the bore 12 standard maximum is 50 mm.
Order the ACEJ12X75, the current ISO 21287 replacement: swap the P for an E and you get the same 12 mm bore, 75 mm stroke and force class in a short compact body. Because the ACPJ follows the older DIN-standard footprint, confirm the ISO 21287 mounting dimensions against your fixture before swapping. Also note this unit has no magnet fitted - the -S option is what enables CMSE / DMSE position switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X75-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X75-20B replacement — usually within 7-8 hours.