Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 90mm 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
- Stroke90 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 ACEJ20X90-50SB
The ACEJ20X90-50SB is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 90 mm stroke that can be trimmed on site. The -50 code gives a 50 mm adjustment window: an external stop screw shortens the extend stroke anywhere in a 40-90 mm range, so one cylinder covers several jig positions. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa that rises to 219.9 N push and 164.9 N pull, with a theoretical 32 kgf at 1.0 MPa. The male rod thread (B code) suits couplings that thread onto the rod.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters in slim fixtures and guarded cells. As this model carries the optional -S magnet, CMSE or DMSE reed and solid-state switches can be mounted along the body slots for end-of-stroke detection. A practical sizing rule: treat roughly 94 N (about 0.6 of the push force) as the usable working force, which corresponds to lifting about 8 kg vertically with a 2:1 margin. Operating window is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, with fixed TPU bumpers at both ends.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 90 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 ACEJ20X90-50SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×90 | 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 ACEJ20X90-50SB Is Used
Fixture clamping on CNC pallets
The 40-90 mm trim range lets one cylinder serve multiple pallet fixtures; 157.1 N push at 0.5 MPa secures light aluminium parts without over-clamping.
Packaging line part diverters
At 30-500 mm/s the rod pushes cartons or trays off a conveyor, and the fitted magnet with a CMSE switch confirms the diverter reached the trimmed stop.
Lab sample press station
The compact body fits inside bench-top enclosures where a full-length ISO 15552 profile cylinder will not, and the male rod thread accepts a small press pad.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-50SB the Right Cylinder?
Compare force classes before ordering: the smaller bore 16 ACEJ delivers 100.5 N push at 0.5 MPa, while the next size up, bore 25, reaches 245.4 N. If your tooling needs more than about 94 N of sustained working force, step up to the 25 mm bore. FA flange or LB foot mounts bolt to the standard ISO 21287 face, and I or Y rod knuckles pair with the male thread. Note the stop screw is a mechanical end stop only - on air loss the rod can drift, so it is not a mid-stroke 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 ACEJ20X90-50SB 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 is 32 kgf at 1.0 MPa. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, with an M5x0.8 port and a 10 mm hard-chrome plated S45C rod.
The -50 code is a 50 mm window: turn the external stop screw to shorten the 90 mm extend stroke to any length from 40 to 90 mm. A fixed TPU bumper at each end absorbs end-of-stroke impact. Because this model carries the optional -S magnet, CMSE or DMSE reed or solid-state switches can be clipped into the body slots for position feedback.
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