This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X120-20B, 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 ACPJ12X120-20B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X120-20B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X120-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X120-20B
- 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 ACPJ12X120-20B
This ACPJ12X120-20B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke down by up to 20 mm, giving a usable range of 100-120 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. Its 120 mm stroke exceeds the 50 mm standard maximum for this bore, so it is a made-to-order build. Note this model is discontinued; the current-production replacement is ACEJ12X120.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim pick-and-place heads and guarded test rigs. A rule of thumb: about 34 N (roughly 3.4 kgf) of push is realistically usable at 0.5 MPa, which lifts about 2.8 kg vertically with a 2:1 margin. The B code gives a male M3x0.5 rod thread, the port is M5x0.8, and a fixed TPU bumper sits at both ends. No magnet is fitted, so no position switch can be mounted; order the -S code for that. Running spec: 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, -20 to +70 C.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X120-20B |
| Bore size | Ø12 mm |
| Stroke | 120 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 ACEJ12X120-20B (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 ACPJ12X120-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×120 | 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 ACPJ12X120-20B Is Used
Lab sample ejector
The 56.5 N push at 0.5 MPa ejects sample trays from a compact analytical tester, with the 100-120 mm trim range matching shallow drawer travel.
PCB test press-off
A light push of about 34 N usable force releases finished circuit boards from a test nest inside a tight gantry where a full-length profile cylinder will not fit.
Vial sorting kickers
The male M3x0.5 rod thread drives a small kicker paddle that diverts pharmaceutical vials on a sorting line at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20B with the ACEJ12X120-20B
At 56.5 N push at 0.5 MPa this 12 mm bore suits light clamping and sensing moves; step up to the 16 mm bore (100.5 N push) if the load is near the 34 N usable limit, or down from the 20 mm bore (157.1 N) if you are oversizing. The 20 mm adjustment window only shortens the extend stroke, it never holds a load on air loss, so add an external stop where position must be kept. FA/FB flange or LB foot mounts bolt to the ISO 21287 face. Since this unit is discontinued, order ACEJ12X120 as the drop-in and confirm the ISO 21287 mounting dimensions first, because ACP follows the older DIN-standard footprint.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X120-20B
- ✓ 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 ACPJ12X120-20B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa that rises to 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window, so the 120 mm extend stroke can be trimmed anywhere in a 100-120 mm range using the stop screw. The 120 mm stroke is non-standard for this bore (standard maximum is 50 mm), so it is made to order. The model is discontinued; ACEJ12X120 is the current replacement.
The hard-anodized aluminium body with an S45C hard-chrome rod is about 50% shorter in mounting length than an ISO 15552 profile cylinder, with a fixed TPU bumper at each end that only decelerates the piston near the ends. Mounting uses the ISO 21287 face: FA/FB flange or LB foot. This unit has no magnet fitted, so CMSE or DMSE switches cannot be used; the optional -S magnet code enables them. Replacement is ACEJ12X120 - confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X120-20B
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