Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40
The AirTAC SAIJ125X175-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 175 mm travel by up to 40 mm. This creates a precise 135-175 mm usable window, allowing exact end-position tuning at commissioning without swapping hardware or adding external stops. It delivers 6136 N of push force at 0.5 MPa and features a robust 32 mm SUS420J2 stainless steel rod.
Designed for heavy loads, this model includes PT tapered G1/2 ports and variable air cushions at both ends to manage kinetic energy. The extruded aluminum barrel incorporates sensor grooves on both sides, though this specific SKU omits the magnet, meaning CMSE or DMSE electronic switches cannot be used without modification. The rear adjuster acts strictly as a travel stop for deceleration, not a lock, so live air is required to hold a load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125AX175-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125AX175-40 Is Used
Variable End-Stop Setup
Dial in the exact 135-175 mm clamping distance during machine commissioning to accommodate different product heights without machining new spacers.
Production Line Changeover
Quickly adjust the rear stopper by up to 40 mm when switching the manufacturing line to a new product variant, minimizing downtime.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets into a precise final position, tuning out mechanical drift on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-40 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks thrust, but a 160 mm bore (10053 N) would be excessive. The adjustable 135-175 mm travel is perfect for product-size changeovers on a line, letting operators set variable end-stops on the fly. For load-holding without continuous air pressure, this cylinder is insufficient; you should explore the SAIL (air-released lock) or BSAI (clamp-lock) series instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 175 mm stroke, 40 mm adjustment, PT G1/2 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 175 mm stroke is below the 300 mm threshold, side-load risks are moderate, but the heavy 32 mm rod thread still requires proper external guiding for optimal longevity.
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 SAIJ125AX175-40 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 40 mm, creating a usable travel window of 135-175 mm. It only sets the travel end and does not lock the load without live air pressure.
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 8590 N of push force at 0.7 MPa.
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 SAIJ125AX175-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.