This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X90-50S, 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 ACPJ12X90-50S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X90-50S is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 90mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X90-50S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke90 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X90-50S
- 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 ACPJ12X90-50S
Double acting with an adjustable extend stroke, the ACPJ12X90-50S is a discontinued DIN-standard compact cylinder in the 12 mm bore class. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -50 code gives a 50 mm adjustment window, so the stop screw trims the 90 mm extend stroke anywhere in a 40-90 mm range on site. Note that the 90 mm stroke exceeds the 50 mm maximum standard stroke for bore 12, so this unit is made to order.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarded assemblies. Because roughly 0.6 of the push force is a realistic working share, plan on about 34 N of usable thrust - enough to lift about 1.7 kg vertically with a 2:1 margin. The -S magnet is fitted on this model, so CMSE / DMSE reed or solid-state switches can be mounted directly. As ACPJ is discontinued, the current-production drop-in is ACEJ12X90; confirm the ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X90-50S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X90-50S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X90-50S |
| Bore size | Ø12 mm |
| Stroke | 90 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 ACEJ12X90-50S (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 ACPJ12X90-50S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×90 | Stroke length in mm. |
| -50 | 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 ACPJ12X90-50S Is Used
Small-parts ejection in assembly jigs
The 40-90 mm trimmable stroke and 56.5 N push at 0.5 MPa eject finished clips or pins from a fixture, with the stop screw set to the exact part depth.
Position-flagged test stations
With the -S magnet fitted, CMSE or DMSE switches report extend and retract on a benchtop leak or marking station running 30-500 mm/s.
Light clamping of PCB fixtures
About 34 N of practical clamping force at 0.5 MPa holds small circuit-board carriers during a screwdriving or soldering cycle.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X90-50S with the ACEJ12X90-50S
Size both ways before committing: bore 16 pushes 100.5 N at 0.5 MPa if 56.5 N is marginal, while staying at bore 12 keeps the M5x0.8 port and M3x0.5 female rod thread compact. The stop screw is a mechanical end stop for the extend stroke only - it does not lock the piston, so on air loss the rod still drifts; add an external check or use a controlled valve for holding. FA/FB flange and LB foot mountings plus I/Y rod knuckles bolt to the standard face. This model is discontinued - order ACEJ12X90 as the current replacement and verify ISO 21287 hole patterns.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X90-50S
- ✓ 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 ACPJ12X90-50S FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N. At 0.7 MPa the figures are 79.2 N push and 59.4 N pull. The theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), and speed runs 30-500 mm/s. As a rule of thumb, count on about 34 N of usable thrust, roughly 1.7 kg of vertical lift with a 2:1 margin.
The -50 code sets a 50 mm window: a stop screw shortens the 90 mm extend stroke down to 40 mm, so one cylinder covers a 40-90 mm range without changing hardware. Fixed TPU bumpers at both ends absorb end-of-travel impact. The ACPJ is discontinued; the current-production successor is ACEJ12X90 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP follows the DIN-standard footprint.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X90-50S
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X90-50S replacement — usually within 7-8 hours.