Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 45mm 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
- Stroke45 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 ACEJ12X45-40SB
The ACEJ12X45-40SB is a double acting ISO 21287 compact cylinder with a 12 mm bore and a 45 mm stroke that an external stop screw trims anywhere in a 40 mm window, giving a usable extend range of 5-45 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N on the extend stroke at 0.7 MPa, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. The male rod thread (B code) bolts straight into knuckle fittings.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into cramped fixtures and guarding where a full-length body will not fit. Because roughly 60% of the push force is a realistic working figure, plan on about 34 N of real work at 0.5 MPa - equivalent to lifting around 1.7 kg vertically with a 2:1 margin. The -S magnet is fitted on this model, so CMSE / DMSE reed or solid-state switches can be added for end-of-stroke sensing, and a fixed TPU bumper at each end absorbs the piston arrival.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-40SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 ACEJ12X45-40SB Is Used
Micro fixture clamping
The 5-45 mm trimmed extend range lets one cylinder clamp thin sheet-metal blanks of different thicknesses on a small jig, with 56.5 N of push at 0.5 MPa enough for light holding duty.
Small-part ejection
Mounted beside a miniature conveyor, the male-threaded rod with a knuckle flicks 1-2 kg components off the belt at the end of a pick station, sensed by a CMSE switch via the fitted magnet.
Lab sample pusher
In compact analytical or packaging benchtop equipment, the short body fits inside tight housings and the stop screw sets an exact 10 mm sample-advance stroke without changing hardware.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40SB the Right Cylinder?
At 56.5 N push (0.5 MPa) this 12 mm bore suits light clamping, sorting and small-part ejection; step up to the 20 mm bore (157.1 N push) if the load grows, or down is not available since 12 mm is the smallest ACEJ bore. Remember the stop screw only shortens the extend stroke and drifts on air loss - it is not a mid-stroke lock. The male rod thread pairs with Y or I knuckles, FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. Speed range is 30-500 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi).
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 ACEJ12X45-40SB FAQ
It is a 12 mm bore, 45 mm stroke double acting cylinder with a 40 mm adjustment window, so the extend stroke can be trimmed to anywhere between 5 and 45 mm with the external stop screw. At 0.5 MPa it delivers 56.5 N push and 42.4 N pull; at 0.7 MPa that rises to 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8. The rod is 6 mm with a male thread.
The ACEJ12X45-40SB uses a hard-anodized aluminium body with an S45C hard-chrome-plated rod and threaded aluminium covers, and its short ISO 21287 envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or holds a load. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped into the body slots for extend and retract detection. Mounting options include FA flange, LB foot and FTC brackets plus I and Y rod knuckles.
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