This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X15-20B, 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 ACPJ12X15-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X15-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 15mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X15-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke15 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X15-20B
- 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 ACPJ12X15-20B
This is a double acting compact cylinder with an adjustable extend stroke: an external stop screw trims the 15 mm stroke within the ordered 20 mm window, so the usable range is 0-15 mm. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa (79.2 N / 59.4 N at 0.7 MPa, 11.5 kgf theoretical maximum at 1.0 MPa). The B code gives a male M3x0.5 rod thread on the 6 mm rod, and the M5x0.8 port follows the bore. Air supply is 0.15-1.0 MPa (22-145 psi) filtered to 40 um, with rod speed from 30-500 mm/s.
The hard-anodized aluminium body with an S45C hard-chrome rod 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. A fixed TPU bumper sits at both ends. Plan on roughly 34 N of real work at 0.5 MPa (about 60% of the rated push), which lifts about 2.9 kg vertically with a 2:1 margin. Note that the stop screw sets the end of stroke only; on air loss the piston still drifts, so it is not a load-holding brake. This model is discontinued - the current-production replacement is ACEJ12X15, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X15-20B |
| Bore size | Ø12 mm |
| Stroke | 15 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 ACEJ12X15-20B (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 ACPJ12X15-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×15 | 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 ACPJ12X15-20B Is Used
Micro press ejection
A 56.5 N push at 0.5 MPa ejects finished pins and small stamped parts from a watch-component die, with the 20 mm window letting the operator trim ejection travel to the die depth.
Lab sample indexing
The short body, about 50% shorter than an ISO 15552 profile cylinder, advances sample trays one station inside a compact analytical instrument chassis at 30-500 mm/s.
Carton tab hold-down
On a small carton-sealing head, the 15 mm stroke with a trimmed stop presses folding tabs flat; the male M3x0.5 rod thread takes a custom pad directly.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20B with the ACEJ12X15-20B
At 12 mm bore this is the smallest force class in the family: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N push, or drop to a smaller actuator only if your load is under about 34 N of real work. The male M3x0.5 rod thread suits knuckle and bracket attachments; FA/FB flange and LB foot mountings bolt to the same face. If you need position sensing, order the -S variant, which carries the optional magnet for CMSE / DMSE switches - this non-S code has no magnet and accepts no sensor. For new builds, specify ACEJ12X15 instead, the current ISO 21287 successor.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X15-20B
- ✓ 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 ACPJ12X15-20B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The bore is 12 mm, stroke 15 mm with a 20 mm adjustment window, rod 6 mm with male M3x0.5 thread, port M5x0.8, pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, and a fixed TPU bumper at both ends.
AirTAC no longer produces the ACPJ family. The current drop-in is ACEJ12X15, the ISO 21287 successor in the same bore, stroke and force class. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions against your fixture before swapping, and add the -S code if you want the optional magnet for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X15-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X15-20B replacement — usually within 7-8 hours.