Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ32X55-20
The AirTAC Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ32X55-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø32mm bore and 55mm 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.
- BoreØ32 mm
- Stroke55 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 ACEJ32X55-20
The ACEJ32X55-20 is a double acting AirTAC compact cylinder built to ISO 21287, with a 32 mm bore and a 55 mm stroke that an external stop screw can trim anywhere in a 20 mm window, giving a usable extend range of 35-55 mm. At 0.5 MPa it delivers 402.1 N on the extend stroke and 345.6 N on retract, rising to 563 N push at 0.7 MPa. Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight jigs, guarding and gantry frames where a full-length body simply will not fit.
For sizing the load: plan on roughly 240 N of real work at 0.5 MPa (about 0.6 of the 402.1 N push rating), which corresponds to lifting about 24 kg vertically, or about 12 kg with a 2:1 margin. The hard-anodized aluminium body carries a S45C hard-chrome plated 12 mm rod, a fixed TPU bumper absorbs end-of-stroke energy at both ends, and the rod end is female M8x1.25 with a 1/8" PT port. This unit has no magnet fitted; order the -S version if you need CMSE / DMSE switch sensing.
Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ32X55-20 Technical Specifications
| Model | Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ32X55-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø32 mm |
| Stroke | 55 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 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 ACEJ32X55-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 32 | Bore size in mm. |
| ×55 | 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 ACEJ32X55-20 Is Used
Fixture clamping on CNC pallets
The 402.1 N push at 0.5 MPa clamps aluminium or small steel workpieces on machining-centre pallets, and the 35-55 mm adjustable range lets one cylinder serve fixtures of slightly different heights without re-plumbing.
Reject pusher on packaging lines
Mounted beside a conveyor, the compact body fits under guarding where an ISO 15552 profile cylinder would overhang, kicking off-spec cartons at up to 500 mm/s with the stroke trimmed to the lane width.
Small part ejection from press dies
With about 24 kg vertical-lift equivalent at 0.5 MPa, the cylinder ejects stamped brackets or moulded caps from shallow die pockets, the TPU bumper limiting shock at both ends of the 55 mm stroke.
Is the Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ32X55-20 the Right Cylinder?
At 402.1 N push (0.5 MPa) this 32 mm bore sits between the 25 mm bore (245.4 N) and the 40 mm bore (628.3 N), so pick 32 mm when a 25 mm unit is under-rated but a 40 mm body is too long for the envelope. The 55 mm stroke is well inside the 200 mm maximum standard stroke for this bore. Remember the stop screw only shortens the extend stroke within the ordered 20 mm window and is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a valve or external stop if the load must be held. Mounting: FA flange or LB foot bolt to the ISO 21287 face, with I and Y rod knuckles available; PT ports are standard and G threads can be ordered.
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 ACEJ32X55-20 FAQ
Push is 402.1 N and pull 345.6 N at 0.5 MPa; at 0.7 MPa push rises to 563 N and pull to 483.8 N, with a theoretical maximum of 82 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the stop screw trims the 55 mm stroke by up to 20 mm (usable 35-55 mm). Operating pressure 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 1/8" PT, rod thread female M8x1.25.
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 knuckles bolt straight to the standard face. Sensing is possible only on the -S version, which carries the optional magnet for CMSE / DMSE switches; this model has no magnet, so no switch can be read on it. A fixed TPU bumper at each end absorbs end-of-stroke energy, but it never locks or holds a load.
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