Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S
The AirTAC SAIJ125X25-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of pull force at 0.5 MPa. With a nominal 25mm stroke and a 10mm adjustment range, it provides a precise 15-25mm usable travel window for dialing in end positions. A PT tapered port thread ensures a rigid, leak-free pneumatic connection.
Featuring an integrated magnet (-S), this unit interfaces directly with CMSE reed and DMSE electronic sensors mounted into the dual-sided extruded aluminum barrel grooves. The rear stopper screw acts purely as a travel end-limit for deceleration and positioning; it is not a lock, so the cylinder cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAIJ125X25-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAIJ125X25-10S Is Used
Machine Setup Tuning
Dial in the exact 15-25mm retraction point during initial commissioning without swapping out the entire cylinder or machining custom spacers.
Product Changeover
Quickly adjust the end-stop by up to 10mm on automated lines handling slightly varying product sizes, minimizing downtime between runs.
Assembly Positioning
Use the rear stopper to fine-tune the pressing or clamping travel limit on large fixtures, relying on the 6136N pull force for heavy-duty actuation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S the Right Cylinder?
Choose this 125mm bore when your application requires the 6136N pull capacity of a large ISO 15552 cylinder but demands exact end-position tuning during commissioning without adding external stops. If your force requirements are lower, stepping down to an 80mm bore yields 2268N of pull force, whereas maintaining the same bore but switching to a fixed-stroke SAI removes the fine-tuning capability entirely.
For load-holding without continuous air pressure, this adjustable stopper is insufficient; you would need an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock. Because the 25mm stroke is short, side-load risks are minimal, but always guide the rod thread (M27x2) accurately to prevent binding.
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 SAIJ125X25-10S FAQ
The nominal stroke is 25mm, but the 10mm rear adjuster allows you to shorten the effective travel, creating a usable stroke window of 15-25mm for precise end-position tuning.
No. The rear adjuster is a travel stop, not a locking mechanism. The SAIJ125X25-10-S cannot hold a load without live air pressure; for fail-safe load holding, consider an SAIL or BSAI series cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.