Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30S 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 ACEJ20X45-30S
The ACEJ20X45-30S is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. The -30 code gives a 30 mm adjustment window: an external stop screw trims the 45 mm stroke down to as little as 15 mm on site, so one cylinder covers several fixture positions.
Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight jigs, guards and gantries. A practical sizing note: at 0.5 MPa roughly 94 N (about 9.6 kgf) is a sensible working figure, which lifts about 4.8 kg vertically with a 2:1 margin. The -S magnet is fitted, so CMSE / DMSE reed or solid-state switches can be mounted in the body slots for end-of-stroke sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30S |
|---|---|
| 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 ACEJ20X45-30S
| 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 ACEJ20X45-30S Is Used
Fixture clamping on CNC pallets
The 15-45 mm trim range lets one cylinder serve different pallet heights; 157.1 N push at 0.5 MPa secures light aluminium workpieces.
Position-verified ejector on small assembly stations
With the -S magnet fitted, CMSE or DMSE switches confirm part ejection, and the stop screw sets exact throw per product variant.
Carton push-off on compact packaging heads
The short body fits inside tight guarding where a full-length ISO 15552 profile cylinder will not, cycling at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-30S the Right Cylinder?
For this force class, compare both directions: a 16 mm bore gives 100.5 N push / 75.4 N pull at 0.5 MPa, while a 25 mm bore steps up to 245.4 N push / 206.2 N pull. Choose the 20 mm when the load sits between those bands and the 15-45 mm trim range matches your stops. The adjuster is a mechanical end stop for the extend stroke only - on air loss the piston still drifts, so add a valve or external stop where holding matters. FA flange or LB foot mounts and I/Y rod knuckles bolt to the ISO 21287 face; the female M6x1.0 rod thread suits standard rod attachments.
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 ACEJ20X45-30S 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 pull 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 45 mm stroke trimmable by up to 30 mm via the stop screw (usable 15-45 mm), running on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), -20 to +70 C, speed 30-500 mm/s, M5x0.8 port and female M6x1.0 rod thread.
An external stop screw shortens the extend stroke within the ordered 30 mm window - it trims down, never lengthens past 45 mm. The fixed TPU bumper at both ends absorbs end-of-stroke energy but does not lock or hold a load. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots; the hard-anodized aluminium body and FA/LB mounting face match standard ISO 21287 fixtures.
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