This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X150-50B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X150-50B 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 ACPJ20X150-50B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X150-50B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 150mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X150-50B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke150 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X150-50B
- 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 ACPJ20X150-50B
This is a double acting compact cylinder with an adjustable extend stroke: an external stop screw trims the 150 mm stroke by up to 50 mm on site, giving a usable range of 100-150 mm. The 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N push at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. Note that the 150 mm stroke exceeds the 100 mm standard maximum for bore 20, so this unit is made to order. The ACPJ family is discontinued; the current-production replacement is ACEJ20X150, and buyers should confirm ISO 21287 mounting dimensions before swapping since the ACP is DIN-standard.
In practice, plan on roughly 94 N of real work at 0.5 MPa (about 60% of the rated push) and expect it to lift about 8 kg vertically with a 2:1 margin. The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight gantries and guarding. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and the B code gives a male rod thread. Operating pressure is 0.15-1.0 MPa (22-145 psi) at speeds of 30-500 mm/s. No magnet is fitted on this version; the optional -S code is required before CMSE or DMSE switches can be used.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X150-50B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X150-50B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X150-50B |
| Bore size | Ø20 mm |
| Stroke | 150 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 ACEJ20X150-50B (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 ACEJ20X150-50B 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 ACPJ20X150-50B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -50 | 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 ACPJ20X150-50B Is Used
Fixture clamping on a CNC jig
The 50 mm adjustment window lets a machinist dial the clamp stroke between 100 and 150 mm for different part heights, with 157.1 N push at 0.5 MPa enough for light aluminum workholding.
Product push-off at a packaging line end stop
A 150 mm made-to-order stroke clears small cartons off a conveyor lane, and the compact short body fits under low guarding where a full-length profile cylinder would not.
Sample press in a lab automation module
The male rod thread and about 8 kg vertical-lift capability (with margin) suit a light pressing or docking head on a compact analytical instrument frame.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X150-50B with the ACEJ20X150-50B
Size between bores: a 16 mm bore gives 100.5 N push at 0.5 MPa, while stepping up to a larger bore multiplies force if 157.1 N is marginal for the load. The stop screw is a mechanical end stop for the extend stroke only - it does not lock the piston mid-stroke, and on air loss the rod can still drift, so do not treat it as a load-holding brake. Mounting uses the FA/FB flange or LB foot family, and the male (B) rod thread suits knuckle accessories. If you need position sensing, order the -S magnet variant; this model has none. For new designs, specify ACEJ20X150 instead - it is the current drop-in in the same bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X150-50B
- ✓ 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 ACPJ20X150-50B 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; theoretical maximum is 32 kgf at 1.0 MPa. The -50 code means the 150 mm extend stroke can be shortened by up to 50 mm with the external stop screw, so the working range is 100-150 mm. Because 150 mm exceeds the 100 mm standard maximum for bore 20, this stroke is made to order. The cylinder is discontinued - ACEJ20X150 is the current replacement.
It is an ISO 21287 short-body cylinder, roughly 50% shorter in mounting length than an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod, M5x0.8 ports and fixed TPU bumpers at both ends that only decelerate at the end of travel. This version has no magnet, so no sensor can be mounted; order the -S code to enable CMSE or DMSE switches. Mounting is FA/FB flange or LB foot, and the B code gives a male rod thread.
Related AirTAC ACE Cylinders
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