This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X35-30S, 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 ACPJ12X35-30S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X35-30S is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 35mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X35-30S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke35 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X35-30S
- 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 ACPJ12X35-30S
The ACPJ12X35-30S is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 35 mm stroke by up to 30 mm on site, giving a usable range of 5-35 mm. At 0.5 MPa the 12 mm bore pushes 56.5 N and pulls 42.4 N; at 0.7 MPa that rises to 79.2 N push. In practice plan for roughly 34 N of real work at 0.5 MPa, which lifts about 2.9 kg vertically with a 2:1 margin - enough for small clamps, gates and light part transfer.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures where a full-length body cannot. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, and the -S code means the magnet is fitted, so CMSE / DMSE reed or solid-state switches can be mounted directly. Note this model is discontinued: the current-production replacement is the ACEJ12X35, same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP series was built to a DIN-standard footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-30S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-30S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X35-30S |
| Bore size | Ø12 mm |
| Stroke | 35 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 ACEJ12X35-30S (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 ACPJ12X35-30S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 ACPJ12X35-30S Is Used
Small-parts ejection in plastic molding
The 5-35 mm adjustable window lets one 12 mm cylinder eject parts of different heights from a mold nest; 56.5 N push at 0.5 MPa handles light sprue and part knock-off.
Position-verified test fixtures
With the -S magnet fitted, CMSE or DMSE switches confirm full extension on a lab fixture, while the stop screw trims the stroke to match each test sample.
Bottle-cap press station
About 2.9 kg of vertical lift capacity at a 2:1 margin suits pressing caps onto small cosmetic or pharmaceutical bottles on a compact packaging line.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-30S with the ACEJ12X35-30S
Size both ways: if 56.5 N push at 0.5 MPa is marginal, step up to the 16 mm bore (100.5 N push at 0.5 MPa); if the load is tiny, the same 12 mm bore in a fixed-stroke ACE costs less to commission. The 30 mm window suits stations where one cylinder must serve several part lengths - set the stop screw once per changeover. Remember the stop is a mechanical end stop only: on air loss the piston drifts, so it is not a load-holding brake. FA/FB flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. For new designs, order the ACEJ12X35 instead - this ACPJ is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X35-30S
- ✓ 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 ACPJ12X35-30S 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; theoretical maximum is 11.5 kgf at 1.0 MPa. The -30 code sets a 30 mm adjustment window: a stop screw shortens the 35 mm extend stroke by up to 30 mm, so the working range is 5-35 mm. It shortens the stroke only - it never extends it past 35 mm - and it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts if air is lost.
The short ISO 21287-class aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with M5x0.8 ports and FA/FB flange or LB foot mounting. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount directly on the body. The ACPJ series is discontinued; the current-production drop-in is the ACEJ12X35 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X35-30S
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X35-30S replacement — usually within 7-8 hours.