This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X15-20, 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 ACPJ12X15-20
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X15-20 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 ACEJ12X15-20 (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 → ACEJ12X15-20
- 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 ACPJ12X15-20
The ACPJ12X15-20 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 15 mm stroke on site within the ordered 20 mm window, giving a usable range of 0-15 mm. At the 12 mm bore it delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The short ISO 21287-class body 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.
In practice, plan on roughly 34 N of usable push at 0.5 MPa (about 0.6 of the rated force), which lifts about 2.9 kg vertically with a 2:1 margin - enough for small covers, chutes or light fixtures. The hard-anodized aluminium body carries an S45C hard-chrome 6 mm rod, fixed TPU bumpers at both ends, and a female M3x0.5 rod thread with M5x0.8 ports. Note that this model is discontinued: the current-production replacement is the ACEJ12X15, so confirm ISO 21287 mounting dimensions before swapping, since the ACP series is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X15-20 |
| 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 ACEJ12X15-20 (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 ACPJ12X15-20
| 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 ACPJ12X15-20 Is Used
Small-part ejection from plastic molds
The 56.5 N push at 0.5 MPa is enough to kick lightweight molded caps or bushings off a benchtop mold, and the 0-15 mm trimmed stroke keeps the ejector travel exactly where the part needs it.
Compact gate latch on a lab automation enclosure
The short body, roughly half the mounting length of an ISO 15552 profile cylinder, fits inside a slim guard door frame, though sensing requires the -S magnet code since this unit ships without a magnet.
Light push-off on a tabletop packaging line
With about 2.9 kg of vertical-lift equivalent at a 2:1 margin, the 12 mm bore nudges small cartons or blister packs off a conveyor edge at 30-500 mm/s without oversizing the fixture.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X15-20 with the ACEJ12X15-20
At 12 mm bore this is the smallest force class in the family: 56.5 N push at 0.5 MPa versus 100.5 N for the 16 mm bore and 157.1 N for the 20 mm bore, so step up if your part weight or clamp force approaches 3 kg. The 15 mm stroke sits well inside the 50 mm maximum standard stroke for this bore, so no made-to-order stroke is needed. The adjuster is a mechanical end stop for the extend stroke only - it does not lock the piston mid-stroke, and on air loss the rod still drifts, so add an external stop if you must hold position. Mounting is FA/FB flange or LB foot; the rod end is female M3x0.5 (choose the B code for a male thread). No magnet is fitted on this code, so position switches cannot be used - order the -S variant if you need CMSE / DMSE sensing. This model is discontinued; the ACEJ12X15 is the drop-in successor in the same bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X15-20
- ✓ 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 ACPJ12X15-20 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 sets a 20 mm adjustment window: a stop screw shortens the 15 mm extend stroke on site, so the usable range is 0-15 mm. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with M5x0.8 ports and a female M3x0.5 rod thread.
It is an ISO 21287-class short-body cylinder with a hard-anodized aluminium body, S45C hard-chrome 6 mm rod, fixed TPU bumpers at both ends, and FA/FB flange or LB foot mounting that bolts into standard fixtures - about 50% shorter in mounting length than an ISO 15552 profile cylinder. The bumpers only decelerate at the ends and never hold a load. No magnet is fitted unless you order the -S code, which enables CMSE / DMSE switches. The ACPJ family is discontinued; the current-production drop-in is the ACEJ12X15, and you should confirm the ISO 21287 mounting dimensions before swapping because the ACP series is DIN-standard.
Related AirTAC ACE Cylinders
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