Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 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 ACEJ20X70-10SB
The ACEJ20X70-10SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. A 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa (219.9 N / 164.9 N at 0.7 MPa, 32 kgf theoretical maximum), and the -10 code gives a 10 mm adjustment window: an external stop screw trims the 70 mm stroke down to 60 mm on site without swapping parts. The male rod thread (B code) suits couplings that need a nut-secured external thread.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not reach. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clamped straight onto the body for end-of-stroke signals. Plan on roughly 94 N of usable push at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke impact, the hard-anodized aluminium body runs with the S45C hard-chrome rod at 30-500 mm/s, and the M5x0.8 ports take standard 20 mm-bore tubing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 70 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 ACEJ20X70-10SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -10 | 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 ACEJ20X70-10SB Is Used
Fixture clamping on CNC jigs
Trims the clamp stroke from 70 down to 60 mm with the stop screw to match fixture pad height on small machining jigs, with the -S magnet confirming full clamp via a CMSE switch.
Small-part ejection off conveyors
The 157.1 N push at 0.5 MPa kicks lightweight housings or blister packs off a belt, and the compact body fits under low conveyor frames.
Lab and test-rig actuation
The 10 mm adjustment window lets test benches dial in exact press travel between 60 and 70 mm, while DMSE switches log both end positions.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10SB the Right Cylinder?
Choose this model when your clamp or position stroke sits between 60 and 70 mm and the load stays under about 94 N of working force at 0.5 MPa. If the job needs more muscle, the 25 mm bore pushes 245.4 N at 0.5 MPa; if 157.1 N is generous, the 16 mm bore still gives 100.5 N. The male rod thread pairs well with rod knuckles (I or Y) and FA flange or LB foot mounts on the ISO 21287 face. Remember the stop screw is an end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve for suspended loads. Max standard stroke for this bore is 100 mm, so 70 mm is a standard build.
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 ACEJ20X70-10SB 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 and 164.9 N, with a 32 kgf theoretical maximum at 1.0 MPa. It is double acting with an adjustable extend stroke: the -10 stop screw trims the 70 mm stroke within a 10 mm window (usable range 60-70 mm). Operating pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um, M5x0.8 ports, male rod thread, PT port thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow gantries and guarded assemblies. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount directly in the body slots. A fixed TPU bumper at each end absorbs end-of-stroke impact, and FA flange, LB foot, FTC brackets plus I/Y rod knuckles bolt to the standard ISO 21287 mounting face.
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