Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S 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 ACEJ20X35-30S
This is a double acting AirTAC ACEJ compact cylinder built to ISO 21287, with a 20 mm bore, 35 mm stroke and a 30 mm adjustment window. An external stop screw trims the extend stroke on site anywhere in the 5-35 mm range, so one unit covers several fixture positions without changing cylinders. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, which suits light clamping, ejecting and sorting heads. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guard spaces.
The hard-anodized aluminium body carries a hard-chrome plated S45C rod, and a fixed TPU bumper sits at both ends to soften end-of-stroke contact. Because the S code is fitted, the optional -S magnet is on board and CMSE or DMSE reed or solid-state switches can be mounted directly in the body slots. As a working rule, plan for about 94 N (roughly 8 kg vertical lift with a 2:1 margin) of real work at 0.5 MPa rather than the full rating. Ports are M5x0.8, pressure runs 0.15-1.0 MPa (22-145 psi) and speed 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S |
|---|---|
| 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 ACEJ20X35-30S
| 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 ACEJ20X35-30S Is Used
Small-part press fitting
Presses dowels or bushings into plastic housings on an electronics assembly line, with the 5-35 mm trimmed stroke matching shallow press depths and about 94 N of usable force at 0.5 MPa.
Conveyor diverting paddle
Kicks small cartons or blister packs off a packaging conveyor; the short ISO 21287 body fits between guard frames where a full-length profile cylinder cannot.
Position-checked test fixture
Clamps a PCB or sensor module in a go/no-go test station, with the fitted -S magnet driving CMSE or DMSE switches so the PLC confirms the trimmed extend position.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S the Right Cylinder?
At this bore size the neighbours matter: the 16 mm ACEJ gives 100.5 N push at 0.5 MPa, while stepping up to 25 mm raises it to 245.4 N, so pick 20 mm when your clamp or eject load sits between roughly 90 and 150 N. Remember the stop screw is a mechanical end stop only - on air loss the piston drifts, so it never holds a load mid-stroke. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report end positions. Female M6x1.0 rod thread, PT ports.
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 ACEJ20X35-30S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum is 32 kgf at 1.0 MPa. The -30 code is a 30 mm adjustment window: a stop screw on the extend side shortens the 35 mm stroke by up to 30 mm, giving a usable range of 5-35 mm. It is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. This model carries the optional -S magnet, so CMSE or DMSE reed or solid-state switches mount in the body slots; FA flange and LB foot mounts bolt straight to the standard face. Operating range is 0.15-1.0 MPa (22-145 psi), -20 to +70 C, 30-500 mm/s.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X35-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.