This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X35-20SB, 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 ACPJ12X35-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X35-20SB 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 ACEJ12X35-20SB (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 → ACEJ12X35-20SB
- 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 ACPJ12X35-20SB
A double acting compact cylinder with adjustable stroke, the ACPJ12X35-20SB carries a 12 mm bore and 35 mm stroke trimmed by a 20 mm stop-screw window, so the extend stroke can be set anywhere between 15 and 35 mm on site. 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 ceiling of 11.5 kgf at 1.0 MPa. The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs and guarding where a full-length body will not fit.
This unit carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signalling, and the B code gives a male 6 mm rod thread. As a planning rule, budget about 34 N of the 0.5 MPa push for real work, which lifts roughly 2.9 kg vertically with a 2:1 margin. Note that this model is discontinued: the current-production drop-in is the ACEJ12X35, so confirm ISO 21287 mounting dimensions before swapping, since the ACP series was built to a DIN-standard footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X35-20SB |
| 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 ACEJ12X35-20SB (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 ACPJ12X35-20SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 ACPJ12X35-20SB Is Used
Small-part ejection from fixtures
The 15-35 mm trimmed extend stroke nudges machined pins or bushings off a jig, with the 56.5 N push at 0.5 MPa ample for parts under 2.9 kg.
Signalled clamp on an assembly bench
With the -S magnet fitted, a CMSE switch confirms the rod is home before the operator releases the workpiece, trimming stroke between 15 and 35 mm as the nest demands.
Sample press in a lab device
A 20 mm stop window lets technicians dial the press travel for vial capping or dip-test plungers, running at 30-500 mm/s on filtered 40 um air.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-20SB with the ACEJ12X35-20SB
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 direct-acting mini actuator if even 34 N of usable force is more than the job needs. The 20 mm adjustment window suits stations where the part position varies slightly and the extend stroke must be trimmed without re-plumbing. Choose the male rod thread (B) with an I or Y knuckle for linkages, and pair FA flange or LB foot mounts with the ISO 21287 bracket family. The stop screw is a mechanical end stop only - on air loss the piston still drifts, so it is not a load-holding brake. For new builds, order the ACEJ12X35 instead, as this ACPJ model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X35-20SB
- ✓ 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 ACPJ12X35-20SB 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 push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. In practice plan on about 34 N of usable push at 0.5 MPa, which corresponds to lifting roughly 2.9 kg vertically with a 2:1 safety margin.
The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 35 mm extend stroke anywhere down to 15 mm, with fixed TPU bumpers at both ends absorbing the stop. The ACPJ family 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, as the ACP was DIN-standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X35-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X35-20SB replacement — usually within 7-8 hours.