Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B 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 ACEJ16X25-20B
The ACEJ16X25-20B is a double acting AirTAC compact cylinder built to ISO 21287, with a 16 mm bore and a 25 mm stroke that an external stop screw trims on site. The -20 code sets a 20 mm adjustment window, so the extend stroke can be set anywhere from 5 mm to the full 25 mm without swapping the cylinder. Air feeds through an M5x0.8 port, the rod ends in a male thread (the B code), and a fixed TPU bumper sits at both ends to soften arrival. Operating range is 0.15-1.0 MPa (22-145 psi) with speeds of 30-500 mm/s.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures a full-length body cannot. Note that no magnet is fitted on this version; order the -S code if you need CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B |
|---|---|
| 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 ACEJ16X25-20B
| 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 ACEJ16X25-20B Is Used
Light gate and chute diverting
Packaging lines use the 25 mm stroke, trimmed down via the 20 mm window, to kick small cartons or divert product flow at up to 500 mm/s.
Compact test and clamp fixtures
The short ISO 21287 body fits inside guarded bench fixtures where an ISO 15552 profile cylinder would overhang, with the male rod thread accepting custom clamp tips.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B the Right Cylinder?
Size down to the 12 mm bore only for very light work at 56.5 N. This model suits jobs where the final stroke must be dialed in on the machine within a 20 mm window. The stop screw is a mechanical end stop for the extend stroke only - on air loss the piston still drifts, so do not rely on it to hold a load mid-stroke. FA flange and LB foot mountings bolt to the ISO 21287 face, and the male rod thread takes standard rod accessories directly. If position feedback matters, specify the -S variant to enable CMSE / DMSE switches.
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 ACEJ16X25-20B FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa it pushes 140.7 N and pulls 105.6 N; theoretical maximum is 20.5 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window: an external stop screw shortens the 25 mm extend stroke to any value from 5 mm up. It is a mechanical end stop, not a mid-stroke lock, so the piston can still drift if air is lost.
The ISO 21287 hard-anodized aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with an 8 mm hard-chrome-plated S45C rod and fixed TPU bumpers at both ends. This version has no magnet, so no sensor can be mounted; order the -S code to enable CMSE / DMSE switches. FA flange and LB foot mountings fit the standard ISO 21287 face, and the male rod thread takes standard accessories.
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.
Request a Quote for Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X25-20B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.