Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 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 ACEJ20X40-10S
A double acting ISO 21287 compact cylinder with a 20 mm bore and 40 mm stroke, the ACEJ20X40-10S carries an external stop screw that trims the extend stroke anywhere in a 10 mm window, giving a usable 30-40 mm range. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, and the hard-anodized aluminium body with an S45C hard-chrome plated rod keeps it accurate through millions of cycles. Air supply is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating, and rod speed runs 30-500 mm/s.
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length cylinder will not fit. In practice, plan for roughly 94 N of real work at 0.5 MPa, and expect it to lift about 8 kg vertically once you keep a 2:1 margin. The -S code on this model means the magnet is fitted, so CMSE / DMSE reed or solid-state switches can be mounted directly on the body slots.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 40 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 ACEJ20X40-10S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 ACEJ20X40-10S Is Used
Fixture clamping on CNC pallets
The 30-40 mm adjustable extend stroke lets one cylinder serve several fixture heights, and 157.1 N at 0.5 MPa holds small aluminium parts firmly during machining.
Sorting gate with position feedback
With the fitted magnet, CMSE or DMSE switches confirm the gate is fully open or trimmed short, while the 10 mm window dials in exactly the throw a diverter needs.
Carton push-off on a packing line
Pushing 200 g cartons off a conveyor at 30-500 mm/s, the compact body fits under low guarding, and about 8 kg vertical lift capacity leaves ample margin.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10S the Right Cylinder?
At 157.1 N push at 0.5 MPa, this bore 20 sits between the 16 mm bore (100.5 N) and the 25 mm bore (245.4 N) - step down for light pick-and-place, up if your load approaches 15 kg. The 10 mm adjuster is a mechanical end stop for the extend stroke only; it does not lock the piston mid-stroke, so on air loss the rod still drifts. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report position. The rod end is female M6x1.0 and the port is M5x0.8.
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 ACEJ20X40-10S FAQ
Bore 20 mm, stroke 40 mm adjustable within a 10 mm window (usable 30-40 mm). Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push rises to 219.9 N and pull to 164.9 N. Theoretical maximum is 32 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um, port M5x0.8, female M6x1.0 rod thread.
An external stop screw shortens the extend stroke by up to 10 mm on site - turn it in to reduce travel, out to regain it, up to the full 40 mm. It is an end stop, not a mid-stroke lock, so the rod drifts if air is lost. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots for end-of-stroke signalling. FA flange and LB foot brackets bolt straight to the ISO 21287 mounting face, and the fixed TPU bumper at each end absorbs end-of-stroke shock.
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 ACEJ20X40-10S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.