This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X50-20SB — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X50-20SB in place of this model. 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 ACPJ12X50-20SB
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X50-20SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X50-20SB
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB
Double acting and adjustable, the ACPJ12X50-20SB is a discontinued DIN-standard compact cylinder: 12 mm bore, 50 mm stroke and a 20 mm trim window, so a stop screw shortens the extend stroke on site to any length between 30 and 50 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N on the extend stroke at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The S code in this model means the optional magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signalling.
The hard-anodized aluminium body with an S45C hard-chrome rod saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why this bore class fits tightly packed fixtures such as small-part ejectors and gate clamps. As a working figure, plan on roughly 34 N of usable push at 0.5 MPa (about 60% of the rating), which lifts around 3 kg vertically - halve that for a 2:1 margin and match parts up to about 1.5 kg. This model is discontinued; the current-production drop-in is the ACEJ12X50 in the same bore, stroke and force class, so confirm the ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-20SB |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting, 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 ACEJ12X50-20SB (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 ACEJ12X50-20SB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 (adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB Is Used
Micro press for connector pins
The 56.5 N push at 0.5 MPa suits pressing small pins into PCB connectors; trimming the stroke to 30-50 mm lets one cylinder serve several pin heights on the same jig.
Position-signalled gate clamp
With the fitted magnet, CMSE or DMSE switches confirm clamp-open and clamp-closed on a small inspection gate, running at 30-500 mm/s without extra hardware.
Compact ejector on a dial table
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, slides under dial-table tooling to push finished watch or sensor parts off the nest.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-20SB with the ACEJ12X50-20SB
Size both ways before ordering: the 16 mm bore gives 100.5 N push at 0.5 MPa if 56.5 N is marginal, while the 12 mm bore itself sits above the smallest class and suits light clamping and ejecting. The 20 mm window trims the 50 mm stroke down to 30 mm minimum - it shortens the extend stroke only and never lengthens it past 50 mm. Remember the stop screw is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve if the load must stay put. Male rod thread (B code) and PT ports are on this unit; FA/FB flange or LB foot mounts bolt to the ISO 21287 face. If you need current production, order the ACEJ12X50 and verify mounting dimensions against your fixture.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-20SB
- ✓ 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 ACPJ12X50-20SB FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 50 mm stroke trimmed by a 20 mm window (usable 30-50 mm), M5x0.8 ports, a 6 mm male-thread rod, TPU bumpers at both ends, operating pressure 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C and speed 30-500 mm/s on air filtered to 40 um.
Order the ACEJ12X50, the current-production ISO 21287 successor: swap the P for an E and you get the same 12 mm bore, 50 mm stroke and force class with a matching short body and mounting family (FA/FB flange, LB foot). Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions against your fixture before swapping. The magnet on this unit is the optional -S code; on the replacement, add -S if you need CMSE or DMSE switch sensing.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X50-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X50-20SB replacement — usually within 7-8 hours.