Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke50 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 ACEJ20X50-10
The ACEJ20X50-10 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N push at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. An external stop screw trims the 50 mm extend stroke by up to 10 mm on site, giving a usable range of 40-50 mm without changing the cylinder.
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 cannot. A hard-anodized aluminium body carries an S45C hard-chrome plated rod, and a fixed TPU bumper at each end absorbs end-of-stroke energy. As a rule of thumb, plan for about 94 N of real work at 0.5 MPa - roughly 9 kg of vertical lift with a 2:1 margin. The magnet is not fitted; order the optional -S code to enable CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 50 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 ACEJ20X50-10
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 ACEJ20X50-10 Is Used
Small-part ejection from molds
The 40-50 mm trimmed extend stroke nudges finished caps or connectors off a mold or nest, with 157.1 N push at 0.5 MPa clearing light sticking forces.
Packaging line divert gates
Short-body compactness fits between conveyor frames; the 10 mm adjustment window lets technicians fine-tune gate throw without swapping the cylinder.
Lab and test-rig actuation
Clean 30-500 mm/s travel and a 9 kg vertical-lift equivalent make it a fit for sample holders and small test fixtures on 0.15-1.0 MPa (22-145 psi) shop air.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10 the Right Cylinder?
At 157.1 N push (0.5 MPa) this bore suits light clamping and small-part transfer; step down to the 16 mm bore (100.5 N) for tighter loads or up to the 25 mm bore (245.4 N) when you need more margin. Remember the stop screw is a mechanical end stop only - on air loss the piston drifts, so it is not a mid-stroke lock. Mounting: FA flange or LB foot bolt to the ISO 21287 face, with I/Y rod knuckles available. If position feedback matters, specify the -S magnet code at order time.
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 ACEJ20X50-10 FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push rises to 219.9 N and pull to 164.9 N. Theoretical maximum is 32 kgf at 1.0 MPa. Speed range is 30-500 mm/s on air filtered to 40 um, with operating pressure 0.15-1.0 MPa (22-145 psi) and proof pressure 1.5 MPa (215 psi).
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a fixed TPU bumper at both ends and FA flange or LB foot mounting. Sensing requires the optional -S magnet code; this model (no S) has no magnet, so CMSE / DMSE switches cannot be mounted unless you order the -S variant.
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