Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 650mm 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
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S
The AirTAC SAIJ125X650-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa, utilizing a 32mm carbon steel rod and a PT G1/2 port. Equipped with a magnet for position sensing, it integrates seamlessly with CMSE reed and DMSE electronic switches fitted into the dual-side sensor grooves. The extruded aluminum barrel design ensures dimensional interchangeability per ISO 15552 standards.
This model provides a 575-650mm usable travel window, allowing you to dial back the nominal 650mm stroke by up to 75mm via the external rear screw. This built-in stopper enables fine end-position tuning during commissioning or product changeover without adding external stops. The adjuster acts solely as a travel stop to set deceleration alongside the variable air cushions; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 650 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 SAIJ125X650-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×650 | 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 SAIJ125X650-75S Is Used
Variable End-Stop Setup
Dial in the exact 575-650mm end-position during machine commissioning to accommodate different product sizes without swapping cylinders.
High-Force Positioning
Leverage 6136N of push force at 0.5 MPa to move heavy jigs into place, using the rear stopper to fine-tune the final resting coordinate.
Changeover Automation
Adjust the travel limit on the fly during production line changeovers, relying on the DMSE electronic sensors to confirm the new trimmed position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-75S the Right Cylinder?
Choose this 125mm bore when an application requires higher thrust than an 80mm bore (2268N pull at 0.5 MPa) but less than a 160mm bore (9425N pull). The adjustable stroke is ideal for machines requiring variable end-stops, offering setup flexibility that a fixed-stroke SAI cannot match. For load-holding without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Given the 650mm stroke, an external guide is recommended to manage side loads and prevent rod deflection.
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 SAIJ125X650-75S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 650mm down to as low as 575mm. This creates a 75mm tuning window for precise end-position calibration without changing the cylinder itself.
It provides 6136N push and 5734N pull force at 0.5 MPa. The -S suffix indicates a built-in magnet for use with AirTAC CMSE reed and DMSE electronic sensors mounted in the standard profile grooves.
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 SAIJ125X650-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.