Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 80mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. Its short compact envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder.
- BoreØ20 mm
- Stroke80 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB
The ACEJ20X80-50SB is a double acting ISO 21287 compact cylinder with a 20 mm bore and an 80 mm stroke that an external stop screw trims on site within the ordered -50 window, giving a usable extend range of 30-80 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, with a theoretical maximum of 32 kgf at 1.0 MPa. In practice, plan on roughly 94 N of real work at 0.5 MPa, which corresponds to lifting 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, so it slots into tight fixtures, guarding and gantries where a full-length body will not fit. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, a fixed TPU bumper absorbs end-of-stroke energy at both ends, and because this model carries the -S code the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be mounted anywhere along the body slots. The B code gives a male rod thread, and the air port is M5x0.8.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 80 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 TPU bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACE-series (ISO 21287) datasheet. Body: hard-anodized aluminium alloy; piston rod: S45C carbon steel with hard-chrome plating. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G. A built-in magnet is OPTIONAL — add the -S code to fit CMSE / DMSE position sensors.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -50 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for CMSE / DMSE sensors (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
ACE-family variants: ACE (double acting), ASE / ATE (single acting push / pull), ACED (double rod), ACEJ (adjustable stroke), TACE / TACED (non-rotating twin-guide yoke). Mounting accessories: FA / FB flange, LB foot, CA / CB clevis, CR, SDB pivot, FTC; plus I and Y knuckles. Thread PT (blank) / G.
Where the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB Is Used
Small-parts ejection in assembly fixtures
The 30-80 mm trimmable extend range lets a jig builder dial in the exact eject distance for connector or PCB push-off stations, with about 94 N of usable push at 0.5 MPa.
Position-verified clamping on test benches
With the -S magnet fitted, CMSE or DMSE switches confirm clamp or release position on leak-test and functional-check rigs, while the TPU bumper quiets each end of travel.
Product diverting on packaging lines
The compact body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, fits between conveyor frames to push cartons or blisters off a belt at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB the Right Cylinder?
At this bore class, compare downward to the ACEJ16 (100.5 N push at 0.5 MPa) if your load is under about 60 N, or upward to the ACEJ25 (245.4 N push) when you need more than roughly 94 N of usable force at 0.5 MPa. The 80 mm stroke sits inside the 100 mm maximum standard stroke for bore 20, so no made-to-order stroke is needed. The -50 adjuster only shortens the extend stroke, and it is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a separate valve or lock for load holding. FA flange, LB foot and FTC brackets plus I and Y rod knuckles bolt to the ISO 21287 face, and the male rod thread suits clevis-style tooling.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short stroke fits the compact body
- ✓ Port/thread type (PT / G)
- ✓ Add -S if you need the magnet for sensors
- ✓ Rod type (female / male B) & mount (FA/LB/CA)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Compact body: keep the stroke short and avoid side load on the rod.
- check Do not dismantle the threaded front/back covers.
- check Keep speed within the rated range; the TPU bumper absorbs stroke-end energy.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50SB 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 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, fluid air filtered to 40 um. The rod is 10 mm with a male thread, the port is M5x0.8, and the extend stroke is adjustable from 30 to 80 mm via the -50 stop screw.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, hard-chrome S45C rod and fixed TPU bumpers at both ends. Because this model carries the optional -S magnet, CMSE or DMSE reed or solid-state switches can be clipped into the body slots for end-of-stroke signalling. FA flange, LB foot and FTC brackets plus I and Y rod knuckles mount directly to the ISO 21287 face.
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