Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20
The AirTAC Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø40mm bore and 50mm stroke, 1/8" 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.
- BoreØ40 mm
- Stroke50 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM8×1.25
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20
The ACEJ40X50-20 is a double acting ISO 21287 compact cylinder with a 40 mm bore and a 50 mm extend stroke that an external stop screw trims on site within the ordered -20 window, giving a usable range of 30-50 mm. At 0.5 MPa it pushes 628.3 N and pulls 571.8 N; at 0.7 MPa push rises to 879.6 N. 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 body will not fit.
In practice, plan on roughly 377 N of real work at 0.5 MPa rather than the full 628.3 N rating, which corresponds to lifting about 32 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome plated rod, a fixed TPU bumper sits at both ends, and the optional -S magnet enables CMSE / DMSE switches; this unit has no magnet fitted. Speed range is 30-500 mm/s over 0.15-1.0 MPa (22-145 psi) of clean, 40 um filtered air.
Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 Technical Specifications
| Model | Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 572 N |
| 0.7 MPa | 880 N | 800 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -20 | 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 ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 Is Used
Fixture clamping on CNC pallets
The 30-50 mm trimmed stroke seats clamps on machined aluminium housings, with 628.3 N of push at 0.5 MPa holding parts firmly through the cut.
Packaging line pushers
A short 50 mm body ejects cartons between guide rails where an ISO 15552 profile cylinder would be roughly twice as long in mounting.
Assembly press assist
Snap-fitting small plastic covers needs about 377 N of usable force; the 40 mm bore delivers it at 0.5 MPa while the stop screw sets the exact seat depth.
Is the Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 the Right Cylinder?
At this force class the 40 mm bore sits between the 32 mm (402.1 N push at 0.5 MPa) and the 50 mm (981.7 N push at 0.5 MPa), so step down for lighter clamping or up if your tooling mass grows. Remember the stop screw is a mechanical end stop only: on air loss the piston still drifts, so it is not a load-holding device. FA flange or LB foot mountings bolt to the ISO 21287 face, and if position feedback is needed later, order the -S code so CMSE / DMSE switches can be used. Rod end here is female M8x1.25 with a PT port.
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 ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X50-20 FAQ
At 0.5 MPa it pushes 628.3 N and pulls 571.8 N; at 0.7 MPa push is 879.6 N and pull 800.5 N, with a theoretical maximum of 128.1 kgf at 1.0 MPa. The -20 code means an external stop screw shortens the 50 mm extend stroke by up to 20 mm, so the working range is 30-50 mm. It runs double acting on 0.15-1.0 MPa (22-145 psi) air at 30-500 mm/s.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA flange or LB foot mountings plus I/Y rod knuckles bolt straight to its face. A fixed TPU bumper at each end absorbs end-of-stroke energy. Sensing requires the optional -S magnet: order ACEJ40X50-20S to run CMSE / DMSE switches, since this non-S model carries no magnet.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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