This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-40B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-40B 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 ACPJ20X120-40B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-40B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X120-40B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X120-40B
- 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 ACPJ20X120-40B
Double acting compact cylinder with an adjustable stroke, the ACPJ20X120-40B runs on a 20 mm bore with a 10 mm rod and M5x0.8 ports. A stop screw trims the extend stroke by up to 40 mm, giving a usable range of 80-120 mm on site. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those figures rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. The 120 mm stroke exceeds the 100 mm maximum standard stroke for this bore, so it is a made-to-order build. This model is discontinued; the current-production replacement is ACEJ20X120.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight gantries and guarding where a full-length body will not fit. A practical sizing rule: plan on roughly 94 N (about 9.6 kg of force) of real work at 0.5 MPa, and expect it to lift about 8 kg vertically with a 2:1 margin. The male rod thread (B code) suits knuckle and tooling attachments, and the fixed TPU bumpers at both ends simply decelerate the piston at each end of travel. Confirm the ISO 21287 mounting dimensions before swapping to the ACEJ.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-40B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-40B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-40B |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ20X120-40B (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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 kgf | |
The ACEJ20X120-40B 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 ACPJ20X120-40B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 (adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-40B Is Used
Fixture clamping on CNC pallets
The 157.1 N push at 0.5 MPa clamps aluminium brackets and small machined parts, with the 40 mm window letting one cylinder serve several fixture heights between 80 and 120 mm.
Packaging line part kickers
A 10 mm rod and 80-120 mm trimmed stroke eject cartons or blisters off a conveyor, and the compact body fits under low guard rails where a long-body cylinder cannot.
Lab sample press positioning
About 8 kg of vertical lift capacity with a 2:1 margin suits lowering probe heads or sample trays in test rigs, with the male rod thread taking a knuckle or probe holder directly.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-40B with the ACEJ20X120-40B
Size against neighbours: the 16 mm bore gives 100.5 N push at 0.5 MPa, while stepping up to a larger bore adds force if 157.1 N is marginal for your load. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - on air loss the piston still drifts, so add a separate valve or lock if holding is required. FA/FB flange and LB foot mountings bolt to the standard face, and the optional -S magnet enables CMSE / DMSE switches (this model, without the S code, carries no magnet). Order ACEJ20X120 as the current drop-in and verify ISO 21287 mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-40B
- ✓ 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 ACPJ20X120-40B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -40 code gives a 40 mm adjustment window, so the extend stroke can be trimmed anywhere from 120 mm down to 80 mm. Note the 120 mm stroke is a non-standard, made-to-order length since the bore 20 maximum standard stroke is 100 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
An external stop screw shortens the extend stroke within the ordered 40 mm window; it cannot lengthen the stroke past 120 mm, and it is an end stop only - it never holds a load if air is lost. Fixed TPU bumpers decelerate the piston at both ends. The ACPJ family is discontinued; the current-production replacement is ACEJ20X120 in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, and order the -S code if you need the optional magnet for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
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