This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X100-50B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X100-50B 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 ACPJ20X100-50B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X100-50B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 100mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X100-50B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke100 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X100-50B
- 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 ACPJ20X100-50B
The ACPJ20X100-50B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 100 mm stroke by up to 50 mm on site, giving a usable range of 50-100 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N push at 0.7 MPa. The male rod thread (B code) suits external knuckles and tooling plates. Note this model is discontinued; the current-production drop-in is the ACEJ20X100 in the same bore, stroke and force class.
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. In practice, plan for roughly 94 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts about 9 kg vertically - or roughly 4-5 kg with a 2:1 margin. Running spec: 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, fixed TPU bumpers both ends, hard-anodized aluminium body with an S45C hard-chrome rod. No magnet is fitted on this version; the optional -S code adds one for CMSE / DMSE switches.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X100-50B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X100-50B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X100-50B |
| Bore size | Ø20 mm |
| Stroke | 100 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 ACEJ20X100-50B (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 ACEJ20X100-50B 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 ACPJ20X100-50B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 ACPJ20X100-50B Is Used
Multi-part jig clamping
The 50 mm adjustment window lets one 20 mm cylinder (157.1 N push at 0.5 MPa) clamp fixtures of varying heights - re-set the stop screw per part family instead of swapping cylinders.
Small-part eject on assembly stations
At 100 mm stroke trimmed down as needed, the 219.9 N push at 0.7 MPa ejects stamped terminals or molded inserts off a nest, with the male rod thread driving a custom pusher.
Gate or diverter actuation on compact lines
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, fits inside tight conveyor guarding to swing diverters and stop gates at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X100-50B with the ACEJ20X100-50B
Size by force: the 20 mm bore gives 157.1 N push at 0.5 MPa; step down to a 16 mm bore (100.5 N) for lighter clamps or up to a 25/32 mm class body when you need more than 220 N. The 50 mm window suits fixtures where the same cylinder serves several part heights - set the stop once per changeover. Remember the stop screw is a mechanical end stop for the extend stroke only, not a mid-stroke lock: on air loss the piston still drifts, so do not rely on it to hold a load. Match FA/FB flange or LB foot mounts and I/Y rod knuckles to the mounting face, and confirm ISO 21287 dimensions on the ACEJ20X100 before swapping from this discontinued model.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X100-50B
- ✓ 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 ACPJ20X100-50B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, port M5x0.8, rod 10 mm with male thread, and a 50 mm adjustment window on the 100 mm stroke. The model is discontinued - the ACEJ20X100 is the current replacement.
An external stop screw shortens the extend stroke by up to 50 mm, so the rod can be set anywhere in a 50-100 mm range; it never lengthens the stroke past 100 mm. It is a mechanical end stop, not a load-holding lock - the piston still drifts if air is lost. This version has no magnet, so no switch can be read; order the -S code (optional magnet) to enable CMSE / DMSE reed or solid-state switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X100-50B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X100-50B replacement — usually within 7-8 hours.