Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20B 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 ACEJ20X80-20B
A double acting ISO 21287 compact cylinder, the ACEJ20X80-20B pairs a 20 mm bore with an 80 mm stroke and a male-threaded rod end (the B code). Air drives the piston both ways, and an external stop screw trims the extend stroke anywhere within the ordered 20 mm window, giving a usable range of 60-80 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. The hard-anodized aluminium body with an S45C hard-chrome-plated rod keeps the envelope short: roughly 50% less mounting length than an ISO 15552 profile cylinder of the same stroke.
Plan the duty around real numbers, not the rating. A sensible working figure is about 94 N of continuous push at 0.5 MPa, and on a vertical axis the rod lifts roughly 8 kg with a 2:1 margin. The fixed TPU bumper at each end absorbs end-of-stroke shock, speed spans 30-500 mm/s, and the operating envelope is 0.15-1.0 MPa (22-145 psi) with -20 to +70 C media. Note that no magnet is fitted on this version; the optional -S code adds one so CMSE / DMSE switches can sense position.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20B |
|---|---|
| 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 ACEJ20X80-20B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -20 | 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 ACEJ20X80-20B Is Used
Fixture clamping on CNC pallets
The 60-80 mm trim range lets one cylinder serve pallets of different heights; about 94 N of working push at 0.5 MPa secures light aluminium parts without crushing.
Packaging line reject pushers
At 30-500 mm/s the rod kicks off-spec cartons from a conveyor, and the short ISO 21287 body slots under low guarding where a full-length profile cylinder will not fit.
Lab sample press station
Lifting about 8 kg vertically with a 2:1 margin, the male-threaded rod takes a custom pressing tip, while the TPU bumper quiets each end of travel.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20B the Right Cylinder?
Size against neighbours: the 16 mm bore delivers 100.5 N push at 0.5 MPa, while the 25 mm bore reaches 245.4 N, so this 20 mm model sits mid-range at 157.1 N. The 80 mm stroke is well inside the 100 mm maximum standard stroke for this bore. Choose the B male rod thread when your tooling screws onto the rod; the blank version offers a female M6x1.0 socket instead. Mount with FA flange or LB foot brackets, and if position feedback matters, order the -S variant so CMSE / DMSE switches can ride the body. Remember the stop screw is a mechanical end stop only - on air loss the piston drifts, so it is not a load-holding lock.
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 ACEJ20X80-20B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. The -20 code means an external stop screw shortens the 80 mm extend stroke by up to 20 mm, so the working range is 60-80 mm. It runs on air filtered to 40 um at 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, with a 10 mm rod and M5x0.8 ports.
The ISO 21287 short body is hard-anodized aluminium with a hard-chrome-plated S45C rod, saving about 50% of the mounting length of an ISO 15552 profile cylinder. A fixed TPU bumper at both ends absorbs end-of-stroke impact. FA flange, LB foot and FTC brackets plus I/Y rod knuckles bolt to the standard face. This model has no magnet, so no switch can be fitted; order the -S code to enable CMSE / DMSE reed or solid-state switches.
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