Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X55-50S
The AirTAC Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X55-50S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø40mm 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.
- BoreØ40 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 ACEJ40X55-50S
A double acting ISO 21287 compact cylinder, the ACEJ40X55-50S pairs a 40 mm bore with a 55 mm stroke that an external stop screw trims anywhere from 5 to 55 mm on site. At 0.5 MPa it pushes 628.3 N and pulls 571.8 N, and the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarded cells where a full-length body will not fit.
Because the -50 window is a mechanical end stop for the extend stroke, it sets position but never locks the piston: on air loss the rod still drifts. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers absorb end-of-stroke energy at both ends, and the fitted -S magnet lets CMSE / DMSE switches report end positions. Planning around 377 N of usable push (about 0.6 of the rating) keeps fixtures honest; that is roughly 19 kg of vertical lift with a 2:1 margin.
Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X55-50S Technical Specifications
| Model | Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X55-50S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø40 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 (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 ACEJ40X55-50S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| -50 | 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 ACEJ40X55-50S Is Used
Fixture clamping on CNC machining centers
Trims the clamp stroke from 5 to 55 mm to match fixture heights, delivering 628.3 N of clamp force at 0.5 MPa on aluminum and steel workpieces.
Small press and staking operations
The 5-55 mm adjustable range lets one cylinder serve several die heights, with 879.6 N available at 0.7 MPa for light staking and marking.
Packaging line reject pushers
Short body fits under guarding beside the conveyor, while the fitted magnet and CMSE switches confirm extend and retract for the PLC.
Is the Airtac ACEJ32~40 Adjustable Cushion Compact Cylinder ACEJ40X55-50S the Right Cylinder?
At 628.3 N push (0.5 MPa) this 40 mm bore suits clamping and pressing in the 60-90 kgf class. Step down to a 32 mm bore (402.1 N) for lighter fixtures, or up to a 50 mm bore (981.7 N) when the job needs nearly double the force. The stop screw trims the extend stroke within the ordered 50 mm window; it is not a mid-stroke lock, so add a separate brake if the load must hold on air loss. FA flange and LB foot mountings bolt to the ISO 21287 face, and this unit already carries the -S magnet for CMSE / DMSE switch mounting.
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 ACEJ40X55-50S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 571.8 N; at 0.7 MPa push rises to 879.6 N (pull 800.5 N), with a theoretical maximum of 128.1 kgf at 1.0 MPa. The -50 code is a 50 mm adjustment window: an external stop screw shortens the 55 mm extend stroke by up to 50 mm, giving a usable range of 5-55 mm. It is a mechanical end stop only - it does not hold a load if air is lost. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 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 model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clamped into the body slots for end-position sensing. FA flange and LB foot mountings, plus I and Y rod knuckles, bolt to the standard ISO 21287 face.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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