Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S
The AirTAC SAIJ125X700-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel window from 625 to 700 mm during commissioning. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it a robust choice for heavy actuators. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for use with CMSE reed and DMSE electronic solid-state switches.
This model uses a 32 mm carbon steel rod and a PT tapered port thread. Unlike fixed-stroke SAI cylinders, the SAIJ rear screw stopper lets you dial in the exact end position without swapping hardware or adding external stops. The adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125X700-75S Is Used
Variable End-Stop Machining
Dial in the exact 625-700 mm retraction point for machining operations that process different part lengths on the same fixture without changing the cylinder.
Product Changeover Diverters
Quickly adjust the stroke by up to 75 mm during packaging line changeovers to accommodate varying box sizes or pusher distances on the fly.
Heavy Assembly Presses
Leverage the 6136 N push force at 0.5 MPa to seat heavy components, using the rear stopper to fine-tune the final pressing depth safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (offering 3927 N push at 0.5 MPa) is insufficient for your heavy payload, but a 160 mm bore (10053 N push) would be excessive. The adjustable 625-700 mm travel window is ideal for product changeovers or setups requiring precise variable end-stops without mechanical rework. Because the nominal stroke is 700 mm, an external guide rail is strongly recommended to prevent side-loading damage to the rod and front cap seal.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 125 mm bore, 700 mm nominal stroke, 75 mm adjustment range, PT port thread, and the -S magnet option. Standard SAIJ mounting accessories include Basic, FA, LB, TC, FTC, TCM1, and TCM2. If your application requires true load-holding without continuous air pressure, consider the SAIL air-released lock or BSAI clamp-lock cylinder instead of relying on the rear stopper.
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 SAIJ125X700-75S FAQ
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 75 mm, providing a usable travel window of 625 to 700 mm. It allows fine-tuning of the end position at commissioning without adding external stops, but it is not a lock and will not hold the load without live air pressure.
At a standard operating pressure of 0.5 MPa, the SAIJ125X700-75-S generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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 SAIJ125X700-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.