Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 45mm 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
- Stroke45 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 ACEJ20X45-30B
The ACEJ20X45-30B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 45 mm stroke by up to 30 mm on site, giving a usable range of 15-45 mm without changing the cylinder. At 0.5 MPa the 20 mm bore delivers 157.1 N push and 117.8 N pull, rising to 219.9 N push at 0.7 MPa. The male rod thread (B code) bolts straight to tooling, and the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and gantries.
In practice, plan for roughly 94 N of real work at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a 10 mm S45C hard-chrome rod, a fixed TPU bumper sits at both ends, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). The magnet is not fitted on this version; order the optional -S code if you later need CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 45 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 ACEJ20X45-30B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×45 | 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 ACEJ20X45-30B Is Used
Fixture clamp with trimmed stroke
On a small CNC jig, the stop screw sets the clamping gap anywhere from 15 to 45 mm, so one cylinder serves several part heights and the 157.1 N push at 0.5 MPa holds light aluminium brackets.
Electronics tray ejection
The 15-45 mm adjustable range ejects PCB trays from a test nest, and the compact body fits where an ISO 15552 profile cylinder would be about twice as long.
Lab sample press
A benchtop sample-prep station uses the male rod thread to mount a pressing pad; about 8 kg of vertical lift capacity covers small vials and caps with margin.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30B the Right Cylinder?
Size the load first: at 0.5 MPa this bore pushes 157.1 N, so keep continuous duty near 94 N or step up to the 25 mm bore (245.4 N push) for heavier clamping; the 16 mm bore (100.5 N push) suits lighter pick-and-place. Remember the stop screw only shortens the extend stroke within the 30 mm window and is not a mid-stroke lock, so a suspended load will drift if air is lost. Mount with FA flange or LB foot brackets, and add the optional -S magnet only if position sensing via CMSE / DMSE switches is required.
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 ACEJ20X45-30B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N, and theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um. The extend stroke is adjustable from 15 to 45 mm via the external stop screw, and the port is M5x0.8.
The -30 code sets a 30 mm adjustment window: turn the external stop screw to shorten the 45 mm extend stroke anywhere down to 15 mm; it is a mechanical end stop, not a load-holding lock. This version has no magnet, so no switch can be read; order the optional -S magnet to enable CMSE / DMSE reed or solid-state switches. Mounting uses FA flange or LB foot brackets on the ISO 21287 face, with a fixed TPU bumper at both ends.
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 ACEJ20X45-30B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.