Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20SB
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20SB is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 25mm 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.
- BoreØ16 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- 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 ACEJ16X25-20SB
The ACEJ16X25-20SB is a double acting ISO 21287 compact cylinder from AirTAC with an adjustable extend stroke. An external stop screw trims the 25 mm stroke by up to 20 mm on site, giving a usable range of 5-25 mm without changing the cylinder.
The 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 an S45C hard-chrome rod with a male thread (B code), and this -S version includes the optional magnet, so CMSE / DMSE switches can be fitted for end-position sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 25 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 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 (Ø16mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 75 N |
| 0.7 MPa | 106 N |
| Max (@1.0 MPa) | 15 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 ACEJ16X25-20SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×25 | 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 ACEJ16X25-20SB Is Used
Small-part press fitting
Presses dowel pins or bearings into plastic housings on an electronics assembly line, where the 5-25 mm trimmed stroke matches shallow press depths exactly.
Packaging line reject pusher
Kicks underweight cartons off a conveyor at 30-500 mm/s, with CMSE switch feedback confirming the retract position between cycles.
Lab fixture clamping
Clamps test coupons in a compact QC fixture where the short ISO 21287 body fits under a guard and about 60 N of usable force is enough for repeatable hold-down.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20SB the Right Cylinder?
Step down to the 12 mm bore (56.5 N) for tighter spaces, or up to 20 mm (157.1 N) when the load needs more force. If the position must hold under load during an air loss, add an external stop - the end stop screw only trims the extend stroke and does not lock the piston. FA flange or LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. Speed range is 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
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 ACEJ16X25-20SB FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa push is 140.7 N and pull 105.6 N; theoretical maximum is 20.5 kgf at 1.0 MPa. The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 25 mm extend stroke to any value from 5 to 25 mm. The stop is a mechanical end stop only - on air loss the piston still drifts, so it is not a mid-stroke lock.
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 fixed TPU bumper at both ends to absorb end-of-stroke energy. This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches mount directly in the body slots. FA flange and LB foot mountings plus I/Y rod knuckles bolt to the standard ISO 21287 face, and the male rod thread (B code) suits external tooling.
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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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