Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 35mm 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
- Stroke35 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 ACEJ20X35-30SB
The ACEJ20X35-30SB is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 35 mm stroke that an external stop screw trims anywhere in a 30 mm window, giving a usable extend range of 5-35 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight pick-and-place heads and small fixtures where a full-length body cannot fit.
For sizing, treat roughly 94 N (about 0.6 of the 0.5 MPa push) as the practical working force, which corresponds to lifting about 8 kg vertically with a 2:1 margin. The male rod thread (B code) suits external rod couplings, and the fitted -S magnet lets CMSE or DMSE switches report end positions. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, with a fixed TPU bumper at each end and a speed range of 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 35 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 ACEJ20X35-30SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -30 | 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 ACEJ20X35-30SB Is Used
Small-parts ejection in assembly stations
The 157.1 N push at 0.5 MPa ejects stamped terminals or molded inserts from a nest, while the 5-35 mm adjustable extend range lets one cylinder serve different die depths without re-plumbing.
Pick-and-place z-axis on compact gantries
The short ISO 21287 body halves the mounting length versus an ISO 15552 profile cylinder, and the fitted magnet with CMSE switches confirms grip height on each cycle of a PCB tray handler.
Light clamping in test fixtures
A usable working force near 94 N clamps connector housings during functional testing; the stop screw sets the exact clamp position per fixture and the TPU bumper quiets each end of stroke.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30SB the Right Cylinder?
At 157.1 N push (0.5 MPa) this 20 mm bore sits between the 16 mm bore at 100.5 N and the 25 mm bore at 245.4 N, so choose the 16 mm bore for lighter grippers and step up to 25 mm if your load approaches 150 N. The 35 mm stroke is well inside the 100 mm maximum standard stroke for this bore, so no made-to-order stroke is needed. The 30 mm adjustment window means one cylinder can cover several station depths; note the stop screw only shortens the extend stroke and drifts on air loss, so it is not a load lock. FA flange or LB foot mountings bolt to the ISO 21287 face, and the -S magnet is already fitted for 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 ACEJ20X35-30SB 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. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, with a 20 mm bore, 35 mm stroke adjustable down to 5 mm, a 10 mm rod with male thread and an M5x0.8 port.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow jigs and gantry heads. This model carries the optional -S magnet, so CMSE or DMSE reed or solid-state switches mount directly in the body slots to signal extend and retract positions. FA flange and LB foot mountings plus I/Y rod knuckles bolt to the standard face, and a fixed TPU bumper at each end absorbs end-of-stroke impact.
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