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AirTAC ACE Series · ISO 21287 Compact Cylinder

Airtac ACE Compact Cylinder ACE25X50S

The AirTAC Airtac ACE Compact Cylinder ACE25X50S is a genuine double acting ISO 21287 compact air cylinder with a Ø25mm bore and 50mm 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.

  • BoreØ25 mm
  • Stroke50 mm
  • Port sizeM5×0.8
  • Acting typeDouble acting
  • Rod threadM6×1.0
  • CushionFixed TPU bumper (both ends)
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About the Airtac ACE Compact Cylinder ACE25X50S

This AirTAC ACE25X50S is a double acting ISO 21287 compact cylinder that extends and retracts its 10 mm rod with air pressure. Its 25 mm bore delivers 245.4 N of push force at 0.5 MPa, so you can plan for about 15 kg of safe vertical lifting with a 2:1 margin, matching real part weights in light automation.

The hard-anodized aluminium body is about 50% shorter than an ISO 15552 profile cylinder, fitting tight jigs and guards. The optional -S magnet is fitted here, so CMSE or DMSE reed and solid-state switches can mount directly to sense rod position, while the fixed TPU bumper absorbs end-of-stroke energy without any adjustable cushioning.

Airtac ACE Compact Cylinder ACE25X50S Technical Specifications

ModelAirtac ACE Compact Cylinder ACE25X50S
SeriesACE compact cylinder
StandardISO 21287
Bore sizeØ25 mm
Stroke50 mm
Acting typeDouble acting
Port sizeM5×0.8
Rod threadM6×1.0
FluidAir (filtered by 40µm element)
Operating pressure0.15 – 1.0 MPa
Proof pressure1.5 MPa
Temperature-20 to +70 °C
Speed range30 – 500 mm/s
CushionFixed TPU bumper (both ends)
Max standard strokeUp to 150 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 (Ø25mm)

PressurePush forcePull force
0.5 MPa245 N206 N
0.7 MPa344 N289 N
Max (@1.0 MPa)50 kgf

Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.

Model Code: Airtac ACE Compact Cylinder ACE25X50S

ACEISO 21287 compact cylinder (double-acting).
25Bore size in mm.
×50Stroke length in mm.
SOptional built-in magnet for CMSE / DMSE sensors (omit for no magnet).
BRod 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 ACE Compact Cylinder ACE25X50S Is Used

precision_manufacturing

Compact Jig Clamping

Use in a tight CNC fixture to clamp small aluminium parts with 245.4 N push force, where the short body fits under a guard that a full-length cylinder would not clear.

packaging

Label Applicator Press

Drive a light labeling head to press labels onto cartons at up to 500 mm/s, with the magnet enabling a CMSE switch to confirm each cycle end.

engineering

Test Stand Actuator

Cycle a small probe in a benchtop durability tester, using the 206.2 N pull stroke to retract the probe, while the fixed TPU bumper protects the mechanism at high speeds.

Is the Airtac ACE Compact Cylinder ACE25X50S the Right Cylinder?

For a lighter push, the ACE20X50 offers 157.1 N at 0.5 MPa, while stepping up to the ACE32X50 gives 402.1 N for heavier work. Since this model carries the -S magnet, order CMSE or DMSE switches to confirm position, but remember a plain ACE does not hold its load when air is lost - add a rod lock or pilot check valve if the load must stay put. The M5x0.8 port suits small-bore circuits, and the female M6x1.0 rod thread accepts standard accessories.

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)
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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 ACE Compact Cylinder ACE25X50S FAQ

At 0.5 MPa, push is 245.4 N and pull is 206.2 N. At 0.7 MPa, push rises to 343.6 N and pull to 288.6 N. The theoretical maximum force is 50.1 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), with proof pressure at 1.5 MPa (215 psi).

The ACE25X50S body is about 50% shorter than an ISO 15552 profile cylinder, so it fits into compact machine frames and under safety guards. It uses a fixed TPU bumper at both ends for deceleration, not an adjustable cushion, and the optional -S magnet allows CMSE or DMSE sensors to detect rod position.

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