This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X20-20SB, 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 ACPJ12X20-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X20-20SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X20-20SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X20-20SB
- 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 ACPJ12X20-20SB
This ACPJ12X20-20SB is a discontinued double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 20 mm stroke anywhere within the ordered 20 mm window, giving a usable range of 0-20 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), with a theoretical peak of 11.5 kgf at 1.0 MPa. The male-threaded rod (B code) and the fitted -S magnet for CMSE / DMSE switches make it a tight fit for sensor-equipped micro fixtures.
The hard-anodized aluminium body carries M5x0.8 ports and a fixed TPU bumper at each end, running 30-500 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi). Its short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim pick-and-place heads and guarded stations. For sizing, treat roughly 34 N (about 3.4 kg of push) as the practical working force at 0.5 MPa, or expect it to lift about 2.9 kg vertically with a 2:1 margin. Note that the stop screw sets the end of travel only - on air loss the piston still drifts. Production has ended; the current drop-in is the ACEJ12X20, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X20-20SB |
| Bore size | Ø12 mm |
| Stroke | 20 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 ACEJ12X20-20SB (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 ACPJ12X20-20SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×20 | 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 ACPJ12X20-20SB Is Used
Micro part ejection
Trims the extend stroke down to a few millimetres to nudge 2-3 kg stamped or moulded micro parts off a nest without overtravel.
Switch-verified test stations
The fitted magnet drives CMSE or DMSE switches to confirm clamp and release on small electronic assemblies at up to 500 mm/s.
Slim fixture clamping
The short body, about 50% shorter than an ISO 15552 profile cylinder, clamps PCB or connector housings inside cramped drill jigs.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20SB with the ACEJ12X20-20SB
At 12 mm bore this is the smallest force step in the ACPJ range: 56.5 N push at 0.5 MPa versus 100.5 N from a 16 mm bore and 157.1 N from a 20 mm bore. Choose it when the load stays under about 34 N of real work; step up a bore if your part weight or friction load exceeds that. The male rod thread suits direct tooling attachment, and the fitted -S magnet lets CMSE / DMSE switches report end positions. FA/FB flange and LB foot mountings bolt to the standard face. Since this model is discontinued, order the ACEJ12X20 as the current-production equivalent and verify ISO 21287 mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X20-20SB
- ✓ 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 ACPJ12X20-20SB 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 and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. In practice plan on about 34 N of usable push (roughly 3.4 kg of work) at 0.5 MPa, or about 2.9 kg of vertical lift with a 2:1 safety margin. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
An external stop screw shortens the extend stroke on site by up to 20 mm, so travel can be set anywhere from 0 to 20 mm; it cannot extend past the ordered stroke and it is not a mid-stroke lock, so the rod still drifts if air is lost. The ACPJ family is discontinued - the current-production replacement is the ACEJ12X20 in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, since the ACP was built to a DIN standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X20-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X20-20SB replacement — usually within 7-8 hours.