Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S
The AirTAC SAIJ125X475-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 475 mm travel by up to 100 mm. This yields a usable end-position window of 375-475 mm, perfect for fine-tuning retract distances during commissioning without swapping hardware. It features a carbon steel piston rod and a PT tapered port thread.
Delivering 6136 N of pull force at 0.5 MPa (and up to 11045 N push at 0.9 MPa), this size 125 bore handles heavy loads. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet option is fully compatible with AirTAC CMSE reed and DMSE solid-state switches for precise position feedback.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 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 SAIJ125 Adjustable Cylinder SAIJ125X475-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance between 375 and 475 mm during machine setup to accommodate varying product sizes without adding external stops.
Heavy Fixture Handling
Leverage the 6136 N pull force to move heavy machining fixtures, using the rear adjuster to fine-tune the clamping position precisely.
Product Line Changeover
Quickly reset the cylinder travel when switching production runs, using the 100 mm adjustment range to adapt the machinery to new dimensions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3681 N pull at 0.5 MPa) lacks the force for heavy fixtures, but a 160 mm bore is physically oversized. The adjustable 375-475 mm window is ideal for product changeovers requiring variable end-stops, whereas a fixed SAI cylinder locks you into one exact distance.
Because the 475 mm stroke is substantial, the 32 mm rod diameter needs external guidance to prevent sagging side-loads. Remember that the rear adjuster acts only as a travel stop and cannot hold a load without live air; for true fail-safe holding, select an SAIL or BSAI lock variant. Replacement matches require bore 125, stroke 475, 100 mm adjust, PT port, and SAIJ mounting (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-100S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw lets you shorten the 475 mm nominal stroke by up to 100 mm, creating a usable travel window of 375-475 mm. It acts as a mechanical stop to set the end position and is not a lock.
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