Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 55mm 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.
- BoreØ16 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- 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 ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S
The ACEJ16X55-40S is a double acting AirTAC compact cylinder built to ISO 21287, with a 16 mm bore and 55 mm stroke that an external stop screw can trim anywhere in a 40 mm window, giving a usable extend range of 15-55 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa those figures rise to 140.7 N and 105.6 N. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures a full-length body cannot reach.
The hard-anodized aluminium body carries an S45C hard-chrome plated 8 mm rod, and a fixed TPU bumper at each end absorbs end-of-stroke energy. Because the -S magnet is fitted, CMSE or DMSE reed and solid-state switches mount directly in the body slots for end-of-stroke sensing. As a rule of thumb, plan on about 60 N (roughly 6 kg of vertical lift with a 2:1 margin) of real work at 0.5 MPa rather than the full 100.5 N rating.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 55 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 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 (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 75 N |
| 0.7 MPa | 141 N | 106 N |
| Max (@1.0 MPa) | 21 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 ACEJ16X55-40S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| -40 | 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 ACEJ16X55-40S Is Used
Small-parts ejection in plastic molding
A 15-55 mm extend range trims the ejector throw to match shallow cavities, and the 100.5 N push at 0.5 MPa clears parts from 16 mm-bore-class tools without oversizing the cell.
Position-verified test fixtures
With the -S magnet fitted, CMSE or DMSE switches confirm the rod has reached the trimmed stop before a benchtop leak or continuity test starts.
Light clamping on compact gantries
The short ISO 21287 body fits between gantry rails where an ISO 15552 profile cylinder would not, holding about 60 N of practical clamp force at 0.5 MPa.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40S the Right Cylinder?
Size this 16 mm bore when your load needs roughly 100 N or less at 0.5 MPa. A 12 mm bore gives only 56.5 N push at the same pressure, while a 20 mm bore raises it to 157.1 N, so step up if your jig or clamp sits near the limit. The 40 mm window means the machine can be commissioned at a shorter extend stroke and trimmed on site without swapping the cylinder. Remember the stop screw is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve for suspended loads. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report position from day one.
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 ACEJ16X55-40S FAQ
This 16 mm bore cylinder pushes 100.5 N and pulls 75.4 N at 0.5 MPa, and 140.7 N / 105.6 N at 0.7 MPa, with a theoretical maximum of 20.5 kgf at 1.0 MPa. It runs double acting on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s. The 55 mm stroke is adjustable down to 15 mm via the 40 mm stop-screw window, the port is M5x0.8, the rod thread is female M4x0.7, and the max standard stroke for this bore is 75 mm.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it suits tight jigs, guards and gantries. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or brakes a load. FA flange and LB foot mounts bolt straight to the standard face. Because this model carries the optional -S magnet, CMSE / DMSE reed or solid-state switches can be clipped into the body slots for end-of-stroke detection.
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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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