Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10SB 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 ACEJ20X40-10SB
The ACEJ20X40-10SB is a double acting ISO 21287 compact cylinder with a 20 mm bore and a 40 mm extend stroke that an external stop screw trims on site by up to 10 mm, giving a usable 30-40 mm range. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N on the extend side at 0.7 MPa. The male rod thread (B code) suits couplings that thread straight on, and the optional -S magnet this model carries lets CMSE / DMSE switches report end positions.
The hard-anodized aluminium body with an S45C hard-chrome rod saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarded cells. A rule of thumb: plan on roughly 94 N (about 9.6 kg lifted) of real vertical work at 0.5 MPa rather than the full 157.1 N. Air supply is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and fixed TPU bumpers absorb end-of-stroke shock at both ends.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10SB |
|---|---|
| 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 ACEJ20X40-10SB
| 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 ACEJ20X40-10SB Is Used
Fixture clamping on CNC pallets
The 157.1 N push at 0.5 MPa clamps small aluminium workpieces, and trimming the stroke to 30-40 mm matches shallow fixture pockets without shimming.
Reject pusher on packaging lines
A short 40 mm stroke with a 10 mm trim window kicks off-spec cartons sideways at up to 500 mm/s, and the male rod thread takes a standard pusher plate.
Sample lift in lab automation
With about 9.6 kg of practical vertical capacity at 0.5 MPa, the cylinder raises microplate stacks inside compact analyzer frames where a full-length body will not fit.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X40-10SB the Right Cylinder?
At this force class, bore 16 pushes 100.5 N at 0.5 MPa if your load is lighter, while bore 25 delivers 245.4 N if you need headroom. Remember the stop screw only shortens the extend stroke within the 10 mm window and is not a mid-stroke lock: on air loss the piston can drift, so support the load separately. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet pairs with CMSE / DMSE switches for position feedback.
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 ACEJ20X40-10SB 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. The -10 code sets a 10 mm adjustment window: an external stop screw shortens the 40 mm extend stroke anywhere in a 30-40 mm range. It is a mechanical end stop only, not a load-holding brake.
The ISO 21287 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 model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped on. FA flange and LB foot mounts plus I/Y rod knuckles bolt to the standard face; port is M5x0.8.
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