Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75SB 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 ACEJ20X75-75SB
A double acting compact actuator built to ISO 21287, the ACEJ20X75-75SB pairs a 20 mm bore with a 75 mm stroke that an external stop screw can trim anywhere in a 75 mm window, so one cylinder covers a 0-75 mm extend range. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, and the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarding where a full-length body cannot fit.
The hard-anodized aluminium body carries a hard-chromed S45C rod with a male thread (the B code), and fixed TPU bumpers absorb end-of-stroke energy at both ends. Because this model carries the optional -S magnet, CMSE or DMSE reed and solid-state switches can be clamped straight onto the body slots. As a rule of thumb, plan on roughly 94 N (about 0.6 of the push force) of real work at 0.5 MPa, which corresponds to lifting about 8 kg vertically with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75SB |
|---|---|
| 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 ACEJ20X75-75SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -75 | 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 ACEJ20X75-75SB Is Used
Fixture clamping on CNC pallets
The 94 N usable push at 0.5 MPa secures small aluminium workpieces, and the stop screw lets one cylinder serve several fixture depths within the 75 mm window.
Product divert on packaging lines
At 30-500 mm/s the rod pushes cartons off a belt, and the fitted magnet feeds CMSE switch signals to the PLC for end-of-stroke confirmation.
Sample press in lab automation
About 8 kg of vertical lift with a 2:1 margin matches vial racks and sample trays, while the compact body slots into bench-top frames a longer cylinder would not fit.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-75SB the Right Cylinder?
Size check: a 16 mm bore gives 100.5 N push at 0.5 MPa, while stepping up to 25 mm raises it to 245.4 N, so the 20 mm bore sits in the middle for light clamping and transfer duties. Remember the stop screw only shortens the extend stroke and is not a mid-stroke lock; on air loss the piston still drifts, so add a separate holding valve if the load must stay put. FA flange or LB foot mountings bolt to the ISO 21287 face, and PT ports take standard fittings.
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 ACEJ20X75-75SB FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa the figures are 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. Rod speed is 30-500 mm/s on air filtered to 40 um, over an operating range of 0.15-1.0 MPa (22-145 psi).
An external stop screw shortens the 75 mm extend stroke by up to 75 mm, giving a usable 0-75 mm range; the fixed TPU bumpers only soften the ends and never hold a load. This model carries the optional -S magnet, so CMSE or DMSE switches mount in the body slots for position feedback.
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