Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm 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.
- BoreØ12 mm
- Stroke35 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB
A double acting compact cylinder built to ISO 21287, the ACEJ12X35-20SB pairs a 12 mm bore with a 35 mm stroke and an external stop screw that trims the extend stroke anywhere in a 20 mm window, giving a usable range of 15-35 mm on site. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, enough for light clamping and sorting heads. The hard-anodized aluminium body with an S45C hard-chrome plated 6 mm rod keeps the envelope short: roughly 50% of the mounting length of an ISO 15552 profile cylinder.
The -S code means the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be slid onto the body for end-of-stroke signals. The B code gives a male rod thread, and the fixed TPU bumper at each end absorbs end-of-stroke shock. Run it on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s. As a rule of thumb, plan on about 34 N of real work at 0.5 MPa, which lifts roughly 2.9 kg vertically with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 35 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 ACEJ12X35-20SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 ACEJ12X35-20SB Is Used
Micro press ejection
Ejects finished watch or connector parts from a small die; the 15-35 mm trimmed range lets the operator dial the ejection travel to the cavity depth without changing cylinders.
Presence check on PCB fixtures
With the fitted magnet and a DMSE switch, the 6 mm rod probes a test fixture and confirms board seating on a conveyor-mounted gantry where a full-length body would not fit.
Carton tab folding
Folds glue tabs on small cosmetic cartons; 56.5 N at 0.5 MPa is enough for paper stock, and the short ISO 21287 body slots between adjacent folding stations.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB the Right Cylinder?
At 12 mm bore this is the smallest ACEJ size: 56.5 N push at 0.5 MPa. Step up to bore 16 for 100.5 N or drop to a fixed-stroke ACE if no on-site trimming is needed. The 35 mm stroke sits inside the 50 mm maximum standard stroke for this bore, so no made-to-order build is required. 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 separate holding valve if the load must stay put. Match FA flange or LB foot mounts to the ISO 21287 face, and order CMSE / DMSE switches alongside since the -S magnet is already fitted.
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 ACEJ12X35-20SB FAQ
Bore 12 mm, stroke 35 mm adjustable within a 20 mm window (usable 15-35 mm). Push 56.5 N and pull 42.4 N at 0.5 MPa; push 79.2 N and pull 59.4 N at 0.7 MPa; theoretical maximum 11.5 kgf at 1.0 MPa. Port is M5x0.8, rod is 6 mm with a male thread, speed 30-500 mm/s, pressure 0.15-1.0 MPa (22-145 psi).
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow guards and close-pitch fixtures. This model carries the optional -S magnet, so CMSE / DMSE switches mount directly on the body slots for position signals. A fixed TPU bumper at each end absorbs end-of-stroke shock, and FA flange or LB foot mounts bolt to the standard face.
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 ACEJ12X35-20SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.