Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 40mm 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.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB
The ACEJ12X40-30SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 40 mm stroke by up to 30 mm, giving a usable range of 10-40 mm on site. At 0.5 MPa the 12 mm bore delivers 56.5 N push and 42.4 N pull, rising to 79.2 N push at 0.7 MPa, which suits light clamping, ejecting and positioning in tight spaces. The male (B) rod thread and fitted -S magnet for CMSE / DMSE switches make it easy to wire into small automation cells.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits slim fixtures where a full-length cylinder will not. A hard-anodized aluminium body with an S45C hard-chrome plated 6 mm rod resists wear, and fixed TPU bumpers absorb end-of-stroke shock at both ends. As a sizing rule of thumb, keep real work to about 34 N (roughly 0.6 of the push force); vertically that means lifting about 2 kg with a 2:1 margin. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 40 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 ACEJ12X40-30SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -30 | 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 ACEJ12X40-30SB Is Used
Small-part ejection from fixtures
The 10-40 mm trimmable stroke and 56.5 N push at 0.5 MPa clear light machined or molded parts off a jig without overshooting the nest.
Micro clamping on electronics assemblies
About 34 N of usable holding force secures PCBs and small housings during screwdriving or test, with the short body fitting inside slim guarding.
Position-verified slide actuation
With the fitted -S magnet, CMSE / DMSE switches confirm extend and retract on a 40 mm slide in compact lab or packaging devices.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30SB the Right Cylinder?
At 12 mm bore this is the lightest ACEJ size: 56.5 N push at 0.5 MPa. If your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N); if 56.5 N is generous for the job, this is the smallest and most compact choice. Plan real work at about 34 N, and note the stop screw is an end stop only - it does not hold a load if air is lost. FA flange or LB foot mountings and I/Y rod knuckles bolt to the ISO 21287 face; the fitted -S magnet accepts CMSE / DMSE switches for end-position sensing. Port is M5x0.8 and the rod end is male thread (B code).
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 ACEJ12X40-30SB FAQ
At 0.5 MPa: 56.5 N push and 42.4 N pull. At 0.7 MPa: 79.2 N push and 59.4 N pull. Theoretical maximum is 11.5 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke (30 mm window on a 40 mm stroke, so 10-40 mm usable), running on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, -20 to +70 C, with an M5x08 port written correctly as M5x0.8 and a male rod thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it suits tight jigs and gantries. Fixed TPU bumpers at both ends absorb end-of-stroke impact. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped into the body slots; FA flange and LB foot mountings plus I/Y rod knuckles bolt straight to the ISO 21287 face.
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