Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 175mm stroke, 1/4" 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.
- BoreØ125 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM16×2.0
- 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 ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S
A double acting AirTAC compact cylinder built to ISO 21287, the ACEJ125X175-50S pairs a 125 mm bore with a 175 mm stroke and a 50 mm adjustment window. An external stop screw trims the extend stroke on site anywhere from 125 to 175 mm, so one cylinder covers several jig positions. At 0.5 MPa it pushes 6135.9 N and pulls 5890.5 N; at 0.7 MPa push rises to 8590.3 N. The hard-anodized aluminium body with an S45C hard-chrome plated 25 mm rod runs at 0.15-1.0 MPa (22-145 psi) and 30-500 mm/s.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters when a 125 mm bore must fit inside a press frame or heavy gantry. Plan on roughly 3680 N of real work at 0.5 MPa, and for vertical duty expect it to lift about 313 kg with a 2:1 margin. The -S code on this model carries the magnet, so CMSE / DMSE switches can be mounted in the body slots. A fixed TPU bumper sits at both ends, and the 1/4" port matches the bore.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/4" |
| Rod thread | M16×2.0 |
| 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 300 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5890 N |
| 0.7 MPa | 8590 N | 8247 N |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S Is Used
Heavy press-frame clamping
The 6135.9 N push at 0.5 MPa clamps steel dies and large weldments, and the 50 mm window lets one cylinder serve dies of different heights from 125 to 175 mm.
Pallet-stacker lift assist
With about 313 kg of vertical lift capacity at a 2:1 margin, it raises heavy pallet fixtures in packaging lines where a full-length profile cylinder will not fit.
Foundry gate actuation
The short ISO 21287 body slots into tight furnace-door frames, and the fitted magnet with CMSE / DMSE switches confirms open and closed positions for interlocks.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S the Right Cylinder?
At this force class the step either way is large: the 100 mm bore delivers 3927.0 N push at 0.5 MPa, while the next size up is the 125 mm bore itself at the top of the range, so confirm 6135.9 N covers your worst-case load before downsizing. Remember the stop screw is a mechanical end stop for the extend stroke, 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 mounting bolts to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches for end-position feedback.
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 ACEJ125 Adjustable Compact Cylinder ACEJ125X175-50S FAQ
At 0.5 MPa it pushes 6135.9 N and pulls 5890.5 N; at 0.7 MPa push is 8590.3 N and pull 8246.7 N, with a theoretical maximum of 1251.4 kgf at 1.0 MPa. The -50 code sets a 50 mm adjustment window: an external stop screw shortens the 175 mm extend stroke by up to 50 mm, giving a usable range of 125-175 mm. It shortens the stroke only - it never extends it past 175 mm - and it is an end stop, not a load-holding brake.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so a 125 mm bore fits where a full-length cylinder cannot. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots for position feedback. FA flange and LB foot mountings bolt to the standard face, the rod end is female M16x2.0, the port is 1/4" PT, and a fixed TPU bumper absorbs end-of-stroke energy at both ends.
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