Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X30-20S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X30-20S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 ACEJ20X30-20S
The ACEJ20X30-20S is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 30 mm stroke that can be trimmed on site by up to 20 mm, giving a usable extend range of 10-30 mm. An external stop screw sets the shorter stroke in seconds - no disassembly, no shims. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those figures rise to 219.9 N and 164.9 N. Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight fixtures, guards and slide assemblies where a full-length body simply will not fit.
For sizing, treat roughly 94 N (about 0.6 of the push rating) as the practical working force at 0.5 MPa, and note the rod can lift about 8 kg vertically with a 2:1 margin. The S code means the magnet is fitted on this unit, so CMSE or DMSE reed or solid-state switches can be clipped onto the body for end-of-stroke sensing. A fixed TPU bumper at each end absorbs end-of-stroke energy, the hard-anodized aluminium body runs on a hard-chrome S45C rod, and the female M6x1.0 rod thread plus FA/LB mounting options drop straight into standard ISO 21287 fixtures.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X30-20S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X30-20S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 30 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 ACEJ20X30-20S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 ACEJ20X30-20S Is Used
Small-part clamping on rotary indexing tables
The 10-30 mm adjustable window lets a fixture builder dial in exact clamp travel for electronics or watch-component nests, with 157.1 N of push at 0.5 MPa enough for light hold-down jigs.
Position-verified ejection on packaging lines
Because the -S magnet is fitted, CMSE or DMSE switches confirm the eject stroke on a blister or carton line, and the short body fits the narrow guard space beside the conveyor.
Sample press in laboratory and test rigs
The 30 mm stroke trimmed down to 10-20 mm gives repeatable short-travel pressing of vials or test coupons, lifting about 8 kg vertically with a 2:1 margin.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X30-20S the Right Cylinder?
This 20 mm bore sits in the middle of the small-bore range: step down to a 16 mm bore for 100.5 N push at 0.5 MPa, or up to a 25 mm bore for 245.4 N when the load grows. Match the 10-30 mm adjustable window to your actual clamping or positioning travel before ordering. The stop screw is a mechanical end stop only - it does not hold a load if air pressure is lost. Choose the female M6x1.0 rod thread (as ordered here) or the B male-thread variant, add FA flange or LB foot mounting, and remember the -S magnet on this model is what enables CMSE / DMSE switch mounting.
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 ACEJ20X30-20S FAQ
At 0.5 MPa the cylinder pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. The ordered stroke is 30 mm and the -20 stop screw trims the extend stroke by up to 20 mm, so the usable range is 10-30 mm. Speed is 30-500 mm/s and operating pressure is 0.15-1.0 MPa (22-145 psi).
It is an ISO 21287 compact cylinder - about 50% shorter in mounting length than an ISO 15552 profile cylinder - with a hard-anodized aluminium body, hard-chrome S45C rod and a fixed TPU bumper at each end. The S code on this model means the magnet is fitted, so CMSE or DMSE reed or solid-state switches mount directly on the body slots; FA flange and LB foot brackets bolt to the standard ISO 21287 face.
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Standard models are processed and dispatched in 3-5 business days.
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