Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20SB is a genuine double acting, double rod, 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, double rod, adjustable stroke
- Rod threadM3×0.5
- 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 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.
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, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
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 (double rod, 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?
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). 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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