Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 50mm 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
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B
The ACEJ12X50-20B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. The -20 code gives a 20 mm adjustment window: an external stop screw trims the 50 mm stroke on site, so the usable extend range is 30-50 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why this size fits inside slim pick-and-place heads and small fixtures. A hard-anodized aluminium body carries an S45C hard-chrome plated 6 mm rod, and a fixed TPU bumper at each end absorbs end-of-stroke shock. Note this unit has no magnet fitted; order the -S code if you later need CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -20 | 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 (double rod, 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 ACEJ12X50-20B Is Used
Compact gating on small conveyor lines
With a body about 50% shorter than an ISO 15552 profile cylinder, this 12 mm unit slides into tight conveyor frames to push small cartons or vials off a 60-100 mm belt lane.
Sample press in lab automation
About 34 N of practical working force seats microplates, caps or probes in diagnostic instruments, and the stop screw allows repeatable, tool-free stroke tuning between assay formats.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20B the Right Cylinder?
The 20 mm adjustment window suits stations where the exact stop position is tuned during commissioning. Remember the stop screw is a mechanical end stop only: on air loss the piston drifts, so it does not hold a load mid-stroke. The male rod thread (B code) suits external knuckles, and FA flange or LB foot mounts bolt to the standard ISO 21287 face. PT ports, M5x0.8.
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 ACEJ12X50-20B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N. The theoretical maximum is 11.5 kgf at 1.0 MPa. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), at 30-500 mm/s and -20 to +70 C. The -20 stop screw trims the 50 mm extend stroke anywhere down to 30 mm.
It is an ISO 21287 compact cylinder: hard-anodized aluminium body, threaded aluminium covers, a 6 mm hard-chrome plated S45C rod and a fixed TPU bumper at each end that only decelerates the piston at the ends. Mounting uses the standard ISO 21287 face with FA flange or LB foot options plus I/Y rod knuckles. Sensing requires the optional -S magnet, which enables CMSE / DMSE switches; this model without the S code carries no magnet, so no switch can be mounted.
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