This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X20-20B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X20-20B 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 ACPJ12X20-20B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X20-20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X20-20B
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20B
The ACPJ12X20-20B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 20 mm stroke anywhere within the ordered 20 mm window, so the usable range is 0-20 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N push at 0.7 MPa. Its ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into narrow jigs and guarding where a full-length body cannot fit.
The male rod thread (the B code) bolts straight to I/Y knuckles, and the hard-anodized aluminium body with S45C hard-chrome rod runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, with fixed TPU bumpers at both ends. Plan on roughly 34 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts about 2.9 kg vertically with a 2:1 margin. Note this model is discontinued: the current-production drop-in is the ACEJ12X20, same bore, stroke and force class - confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X20-20B |
| Bore size | Ø12 mm |
| Stroke | 20 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 ACEJ12X20-20B (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 | 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 ACEJ12X20-20B 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 ACPJ12X20-20B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×20 | 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 ACPJ12X20-20B Is Used
Micro part ejection from fixtures
The 56.5 N push at 0.5 MPa (about 34 N usable) is enough to strip small plastic or machined parts off a locating pin, and the 0-20 mm adjustable range lets you tune the eject travel without changing tooling.
Compact gating on small assembly stations
A 12 mm bore body fits inside tight guarding brackets, and the male rod thread (B code) couples directly to a knuckle for a swing gate or divert tab on a benchtop line.
Sample press in lab automation
The 2.9 kg vertical-lift equivalent with a 2:1 margin suits capping or light pressing of vials and sample trays, with the stop screw set to a repeatable short stroke.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X20-20B with the ACEJ12X20-20B
At 12 mm bore this is the smallest ACPJ size: 56.5 N push at 0.5 MPa versus 100.5 N for the 16 mm bore and 157.1 N for the 20 mm bore, so step up if your part weight or friction load exceeds about 34 N of usable force. The 20 mm stroke sits well inside the 50 mm maximum standard stroke for this bore. The adjuster is a mechanical end stop for the extend stroke only - it does not lock the piston mid-stroke, and on air loss the rod still drifts, so add a separate clamp if you must hold position. If you need position sensing, order the -S variant, since this model without the S code has no magnet and cannot carry CMSE / DMSE switches. For new builds, specify the ACEJ12X20 instead - this ACPJ is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X20-20B
- ✓ 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 ACPJ12X20-20B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push is 79.2 N and pull 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. The -20 code is a 20 mm adjustment window: an external stop screw shortens the 20 mm extend stroke by up to 20 mm, giving a usable range of 0-20 mm. It is a mechanical end stop, not a mid-stroke lock - on air loss the piston still drifts. The model is discontinued; the ACEJ12X20 is the current replacement.
It is an ISO 21287-class short-body cylinder, roughly 50% shorter in mounting length than an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome 6 mm rod, M5x0.8 ports and fixed TPU bumpers at both ends. FA/FB flanges and LB feet bolt to the standard face. The magnet is the optional -S code: only with -S can CMSE or DMSE switches be fitted, and this particular model (no S) has no magnet at all. For new projects order the ACEJ12X20 and confirm ISO 21287 mounting dimensions.
Related AirTAC ACE Cylinders
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