Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X20-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X20-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 20mm stroke, 1/8" 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
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- 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 ACEJ20X20-20
The ACEJ20X20-20 is a double acting ISO 21287 compact cylinder from AirTAC with an adjustable extend stroke: an external stop screw trims the 20 mm stroke on site anywhere within the ordered 20 mm window, giving a usable range of 0-20 mm. At 0.5 MPa the 20 mm bore pushes 157.1 N and pulls 117.8 N, rising to 219.9 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. Applying a 0.6 rule of thumb to the push figure, plan for roughly 94 N of real work, which is about 9.6 kg of safe vertical lift at 0.5 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so this 20 mm stroke unit slots into tight pick-and-place heads and small jigs. A fixed TPU bumper at each end absorbs end-of-stroke impact, the hard-anodized aluminium body carries the 1/8" ports, and the S45C hard-chrome rod ends in a female M6x1.0 thread. Note that the adjuster is a mechanical end stop only: on air loss the piston drifts, and this unit has no magnet fitted, so CMSE or DMSE switches require the optional -S code.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X20-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X20-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 20 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| 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 ACEJ20X20-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 (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 ACEJ20X20-20 Is Used
Small jig clamping
The 157.1 N push at 0.5 MPa holds light aluminium or plastic workpieces in drilling and marking jigs, while the 0-20 mm adjustable range matches varying fixture depths.
Pick-and-place lift
With about 9.6 kg of safe vertical lift at 0.5 MPa, this cylinder raises small machined caps and connectors on compact assembly heads where body length is critical.
Ejector on packaging lines
A 20 mm stroke trimmed by the stop screw gives a repeatable short push to kick misaligned cartons off a conveyor lane at up to 500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X20-20 the Right Cylinder?
At 157.1 N push (0.5 MPa), the 20 mm bore suits light clamping and small-part transfer. Step down to the 16 mm bore (100.5 N push) for lighter tooling, or up to the 25 mm bore (245.4 N push) if your fixture needs more margin. Speed range is 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). The -20 window lets one cylinder serve several station depths without shims. Mount with FA flange or LB foot brackets, and add the optional -S magnet if CMSE / DMSE position sensing is planned later.
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 ACEJ20X20-20 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa the figures are 219.9 N push and 164.9 N pull. The theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure, and speed runs 30-500 mm/s.
The -20 code is a 20 mm adjustment window: an external stop screw shortens the 20 mm extend stroke on site, giving any setting from 0 to 20 mm. It is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. This model has no magnet fitted; order the optional -S version to enable CMSE or DMSE switches. The fixed TPU bumpers at both ends soften the stops, and FA flange or LB foot mounting bolts to the ISO 21287 face.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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