Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10SB 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 ACEJ20X50-10SB
The ACEJ20X50-10SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 50 mm stroke by up to 10 mm on site, giving a usable 40-50 mm range without swapping the cylinder. At 0.5 MPa the 20 mm bore delivers 157.1 N push and 117.8 N pull, rising to 219.9 N push at 0.7 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures where a full-length body will not fit.
Because the magnet is fitted under the -S code, CMSE / DMSE reed or solid-state switches can be mounted anywhere along the body to report end positions. The B code gives a male rod thread on the 10 mm rod, and the M5x0.8 ports keep the plumbing small. As a rule of thumb, plan on roughly 94 N of real work at 0.5 MPa (about 60% of the push rating), which lifts around 4 kg vertically - halve that for a 2:1 margin on lifting applications.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10SB |
|---|---|
| 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 ACEJ20X50-10SB
| 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 ACEJ20X50-10SB Is Used
Small-parts clamping on CNC fixtures
The 157.1 N push at 0.5 MPa holds aluminium or plastic workpieces during light milling or drilling, and the 40-50 mm adjustable range lets one fixture serve several part heights.
Position-verified ejector on pick-and-place heads
With the fitted magnet, CMSE or DMSE switches confirm the rod has fully extended before the gripper releases, protecting delicate electronics assemblies.
Carton push-off on compact packaging lines
The short body, about 50% shorter than an ISO 15552 profile cylinder, fits inside tight guarding, while 117.8 N pull retracts the pusher cleanly at cycle rates up to 500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X50-10SB the Right Cylinder?
Size both ways before committing: the 16 mm bore gives 100.5 N push at 0.5 MPa if your load is lighter, while the 25 mm bore reaches 245.4 N push for heavier clamping. For this 20 mm model, treat 157.1 N push as the theoretical figure and design around about 94 N. The stop screw only shortens the extend stroke and is not a mid-stroke lock - on air loss the piston still drifts, so add a valve or external stop if you need position holding. FA flange or LB foot mountings bolt to the ISO 21287 face, and the male rod thread suits clevis-style tooling.
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 ACEJ20X50-10SB FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N and pull 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. The -10 code means the external stop screw trims the 50 mm extend stroke by up to 10 mm, so the working range is 40-50 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, S45C hard-chrome plated 10 mm rod and a fixed TPU bumper at each end to absorb end-of-stroke energy. This model carries the optional -S magnet, so CMSE or DMSE switches can be clipped onto the body slots for end-position signals. FA flange and LB foot mountings fit the standard ISO 21287 face; the male rod thread (B code) connects directly to knuckle tooling.
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