This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-40SB, 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 ACPJ12X40-40SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-40SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 40mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X40-40SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X40-40SB
- 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 ACPJ12X40-40SB
The ACPJ12X40-40SB is a double acting, adjustable-stroke compact cylinder in the discontinued AirTAC ACPJ range. Its 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The -40 code sets a 40 mm adjustment window: a stop screw trims the extend stroke anywhere from 0 to 40 mm on site, so one cylinder covers several jig positions. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clamped straight onto the body for end-of-stroke sensing.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits cramped fixtures, guarding and pick stations. A hard-anodized aluminium body with an S45C hard-chrome 6 mm rod, fixed TPU bumpers at both ends, M5x0.8 ports and a male rod thread (the B code) round out the build. As a planning figure, budget about 34 N (roughly 3 kg of vertical lift with a 2:1 margin) of real work at 0.5 MPa rather than the full rating. Note that this model is discontinued: the current-production drop-in is the ACEJ12X40, and buyers should confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-40SB |
| Bore size | Ø12 mm |
| Stroke | 40 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 ACEJ12X40-40SB (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 ACPJ12X40-40SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -40 | 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 ACPJ12X40-40SB Is Used
Small-part ejection from plastic molds
The trimmed 0-40 mm extend stroke nudges finished clips or connectors off a mold or nest, with 56.5 N of push at 0.5 MPa enough for light free-falling parts.
Position-verified test fixtures
Because the -S magnet is fitted, CMSE or DMSE switches confirm the rod has reached the trimmed stop before an electrical test or marking cycle starts.
Clamping PCBs in burn-in racks
About 34 N of usable clamp force at 0.5 MPa holds circuit boards gently against contacts, and the short body fits inside dense rack pitch where a full-length cylinder cannot.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40SB with the ACEJ12X40-40SB
Size against the load: at 0.5 MPa this bore pushes 56.5 N, so keep continuous work near 34 N. If your part or tooling weighs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa); for lighter, tighter duties the same family starts at 12 mm. The male rod thread (B) pairs with I/Y knuckles, and FA/FB flange or LB foot mounts bolt to the standard face. The -S magnet on this unit accepts CMSE / DMSE switches; without an -S code there is no magnet. The stop screw is a mechanical end stop for the extend stroke only - it is not a mid-stroke lock, and on air loss the piston still drifts. This model is discontinued; order the ACEJ12X40 as the current replacement and verify ISO 21287 mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-40SB
- ✓ 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 ACPJ12X40-40SB 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, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 40 mm stroke trimmed by a 40 mm adjustment window, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, M5x0.8 ports, a 6 mm male-thread rod and fixed TPU bumpers both ends.
AirTAC no longer produces the ACPJ family. The current drop-in is the ACEJ12X40 (swap the P for an E), an ISO 21287 compact cylinder in the same bore, stroke and force class with a matching mounting family. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions against your fixture before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-40SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-40SB replacement — usually within 7-8 hours.