Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10B 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 ACEJ20X45-10B
A double acting ISO 21287 compact cylinder, the ACEJ20X45-10B pairs a 20 mm bore with a 45 mm stroke that an external stop screw trims by up to 10 mm, giving a usable extend range of 35-45 mm without changing hardware. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa, with a theoretical ceiling of 32 kgf at 1.0 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarded cells. 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 male (B) rod thread suits inline tooling, and the fixed TPU bumper at each end absorbs end-of-stroke shock. Speed range is 30-500 mm/s across 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10B |
|---|---|
| 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 ACEJ20X45-10B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| -10 | 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 ACEJ20X45-10B Is Used
Small-parts press fitting
The 157.1 N push at 0.5 MPa seats bushings and dowel pins in electronics assemblies, with the 35-45 mm trim matching varying part heights.
Fixture clamping on CNC pallets
Male rod thread and about 8 kg vertical lift capacity make it a compact clamp for jigs where a full-length profile cylinder will not fit.
Carton flap tuck stations
Fast 30-500 mm/s cycling tucks flaps on a packaging line, and the stop screw sets the exact tuck depth per carton size.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X45-10B the Right Cylinder?
At this bore size the 20 mm unit delivers 157.1 N push at 0.5 MPa; step down to a 16 mm bore (100.5 N) for lighter clamping, or up to 25 mm (245.4 N) when the load creeps. The -10 window only shortens the extend stroke, and the stop screw is not a load-holding device, so the rod still drifts if air is lost. Order the optional -S code if you later need CMSE or DMSE switches; this model has no magnet. FA flange, LB foot and I/Y knuckles mount on the standard ISO 21287 face.
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 ACEJ20X45-10B 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, with a theoretical maximum of 32 kgf at 1.0 MPa. The -10 code is a 10 mm adjustment window: an external stop screw shortens the 45 mm extend stroke on site to any setting between 35 and 45 mm. It shortens the stroke only and acts as an end stop, not a mid-stroke lock, so the piston still drifts on air loss. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
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 hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. This version has no magnet; order the optional -S code to enable CMSE or DMSE switches. FA flange, LB foot, FTC brackets and I/Y rod knuckles bolt to the standard face, and the B code gives a male rod thread with M5x0.8 air ports.
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