This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACE12X125B, 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 ACP Compact Cylinder ACP12X125B
The AirTAC ACP Compact Cylinder ACP12X125B is a double acting DIN-standard tight/compact air cylinder with a Ø12mm bore and 125mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACE12X125B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM3×0.5
- StatusDiscontinued → ACE12X125B
- 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 ACP Compact Cylinder ACP12X125B
The ACP12X125B is a double acting DIN-standard compact cylinder with a 12 mm bore and a made-to-order 125 mm stroke, well beyond the 50 mm standard limit for this bore size. At 0.5 MPa it pushes with 56.5 N and pulls with 42.4 N, rising to 79.2 N and 59.4 N at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The male rod thread (B code) ends in a 6 mm rod, and the air ports are M5x0.8, which is fixed by the bore. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, temperature -20 to +70 C.
Its hard-anodized aluminium body with threaded aluminium covers and an S45C hard-chrome rod keeps the short ISO 21287-class body about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into slim fixtures and tight machine frames. A fixed TPU bumper at each end only decelerates the piston at stroke ends - it never holds a load, so add a rod lock or pilot check valve where position must be kept on air loss. Note this model is discontinued: the current-production direct is the ACE12X125, and buyers should confirm ISO 21287 mounting dimensions before swapping.
Airtac ACP Compact Cylinder ACP12X125B Technical Specifications
| Model | Airtac ACP Compact Cylinder ACP12X125B |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE12X125B |
| Bore size | Ø12 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| 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 ACE12X125B (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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 kgf | |
The ACE12X125B produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACP Compact Cylinder ACP12X125B
| ACP | DIN compact cylinder (double-acting, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| 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 ACP Compact Cylinder ACP12X125B Is Used
Lab sample ejector
The 56.5 N push at 0.5 MPa is enough to eject slides or small sample trays from a fixture, and the 125 mm made-to-order stroke reaches deep into a narrow benchtop housing where a full-length cylinder will not fit.
Connector test-actuator slide
The male-threaded 6 mm rod bolts straight to an I or Y knuckle to drive a light probe carriage over 125 mm, and the -S magnet option with a CMSE switch flags end-of-travel in test software.
Replacing the Airtac ACP Compact Cylinder ACP12X125B with the ACE12X125B
At 12 mm bore this is the lightest force class in the range: 56.5 N push at 0.5 MPa. If your load needs more, step up to the 16 mm bore (100.5 N push) or 20 mm bore (157.1 N push) at the same pressure; if less, this is already the smallest. The 125 mm stroke exceeds the 50 mm standard maximum for bore 12, so it is a made-to-order item - confirm lead time. The B code gives a male rod thread on the 6 mm rod; omit B for a female thread. The magnet is not fitted on this code - order the -S version if you need CMSE or DMSE switch sensing. This model is discontinued; the ACE12X125 is the current ISO 21287 replacement in the same bore, stroke and force class, so verify mounting dimensions before ordering.
Replacement checklist
- ✓ Current-production ACE → ACE12X125B
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACP Compact Cylinder ACP12X125B FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push is 79.2 N and pull 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. Speed range is 30-500 mm/s, operating pressure 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure, and the port is M5x0.8. The 125 mm stroke is a non-standard, made-to-order length for this 12 mm bore.
The short-body aluminium build saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA/FB flange, LB foot or CA/CB clevis brackets bolt to the same mounting face. The fixed TPU bumpers at both ends only soften end-of-stroke contact - they do not brake or hold a load, so use a rod lock or pilot check valve for held positions. This model is discontinued; the ACE12X125 is the current direct, so confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACE12X125B
Send us the quantity and destination. We confirm price, stock and lead time on the ACE12X125B replacement — usually within 7-8 hours.