Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 ACEJ20X75-40SB
The ACEJ20X75-40SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 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. The -40 code gives a 40 mm adjustment window: an external stop screw trims the 75 mm stroke down on site, so the usable extend range is 35-75 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight pick-and-place gantries and fixture plates. This S-coded unit carries the optional -S magnet, so CMSE or DMSE reed or solid-state switches can be clamped straight onto the body for end-of-stroke signals. The B code gives a male M6x1.0 rod thread. Planning tip: at 0.5 MPa the push force equals roughly 16 kg of vertical lift, so halving for a 2:1 margin means it lifts about 8 kg vertically.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 75 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 ACEJ20X75-40SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -40 | 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 ACEJ20X75-40SB Is Used
Fixture clamping on CNC jigs
The 35-75 mm adjustable window lets one cylinder serve several jig heights; 157.1 N at 0.5 MPa suits light clamping of aluminium brackets.
Small-part lift in pick-and-place heads
With about 8 kg of vertical lift at a 2:1 margin, it raises connectors or machined blanks between conveyor and tray.
Position-verified ejector on assembly lines
The fitted -S magnet with CMSE / DMSE switches confirms extend and retract on electronics assembly stations running 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-40SB the Right Cylinder?
Size both ways before committing: a 16 mm bore pushes only 100.5 N at 0.5 MPa, while a 25 mm bore reaches 245.4 N, so the 20 mm sits mid-range for light clamping and transfer heads. Plan on about 94 N of usable work at 0.5 MPa rather than the full 157.1 N rating. The stop screw only shortens the extend stroke and 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 or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches.
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 ACEJ20X75-40SB FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N, and the theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 40 mm adjustable window on the 75 mm stroke (usable 35-75 mm), 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, port M5x0.8, male M6x1.0 rod thread, PT port thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, ideal for guarded cells and slim gantries. A fixed TPU bumper at each end absorbs end-of-stroke energy. This unit carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots; FA flange, LB foot and I/Y rod knuckles bolt straight to the ISO 21287 face.
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