This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X125-100, 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 ACPJ12X125-100
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X125-100 is a double acting, double rod, adjustable stroke 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 ACEJ12X125-100 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X125-100
- 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 ACPJ12X125-100
The ACPJ12X125-100 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 125 mm stroke by up to 100 mm, giving a usable range of 25-125 mm on site. At the 12 mm bore 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. The 125 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 the ACEJ12X125.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body will not fit. A practical sizing rule: plan on roughly 34 N of real work at 0.5 MPa, which lifts about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and speed runs 30-500 mm/s. No magnet is fitted on this version, so position switches cannot be mounted unless you order the -S code.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-100 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-100 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X125-100 |
| Bore size | Ø12 mm |
| Stroke | 125 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 ACEJ12X125-100 (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 ACPJ12X125-100
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -100 | 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 ACPJ12X125-100 Is Used
Micro switch assembly clamping
Holds small PCB-mounted switches and relay housings during solder or screw-driving, using the trimmed 25-125 mm extend range to match shallow fixture depths.
Vial reject push-off
Ejects off-spec 2-5 g vials from a pharma inspection lane at up to 500 mm/s; the 56.5 N push is ample for parts this light.
Connector pin press-fit
Seats low-force connectors in telecom harness jigs, where the 34 N working figure keeps delicate contacts undamaged.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-100 with the ACEJ12X125-100
Size up or down from the 12 mm bore: the 16 mm bore gives 100.5 N push at 0.5 MPa and the 20 mm bore 157.1 N, while this 12 mm unit suits light clamping and small part transfer at 56.5 N. If you need position sensing, order the -S variant so CMSE / DMSE switches can be used. FA/FB flange and LB foot mountings bolt to the standard face. The adjuster is a mechanical end stop for the extend stroke only - on air loss the piston still drifts, so it is not a load-holding device. Before ordering, confirm the ISO 21287 mounting dimensions of the ACEJ12X125 replacement.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X125-100
- ✓ 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 ACPJ12X125-100 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. The -100 code is a 100 mm adjustment window, so the stop screw trims the 125 mm extend stroke anywhere down to 25 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s. The 125 mm stroke is non-standard for this bore and made to order.
It is a short-body compact cylinder with a hard-anodized aluminium body, S45C hard-chrome rod, fixed TPU bumpers at both ends and an M5x0.8 port; the body saves about 50% of the mounting length of an ISO 15552 profile cylinder. FA/FB flange and LB foot mountings are available, and the rod end is female M3x0.5. No magnet is fitted unless the optional -S code is ordered, which then allows CMSE / DMSE switches. The model is discontinued - the ACEJ12X125 is the current drop-in; confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X125-100
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