Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S
The AirTAC SAIJ125X70-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 60 to 70 mm. It belongs to the 125 mm bore class, generating 6136 N of push force and 5734 N of pull force at 0.5 MPa. The integrated -S magnet enables position detection, functioning seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded barrel grooves.
This adjustable-stroke model uses a PT tapered port thread and a robust 32 mm carbon steel rod with an M27x2 thread, yielding high resistance against side loads. The rear stopper allows precise end-position tuning during commissioning without adding external stops, while the variable air cushions at both ends manage deceleration across its 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 70 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 SAIJ125X70-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×70 | 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 SAIJ125X70-10S Is Used
Heavy-Duty Clamp Tuning
Dial in the exact 60-70 mm clamping reach on heavy fixtures, allowing operators to compensate for jaw wear or varying part sizes without repositioning the cylinder.
Product Changeover
Quickly adjust the end-stop during production line format changes, using the 10 mm rear screw to accommodate slightly different component heights on the fly.
Press End-Position Setup
Fine-tune the bottoming position of a high-force pressing or stamping station at commissioning, leveraging the 6136 N thrust to set precise mechanical limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X70-10S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, whereas moving up to a 160 mm bore yields 10053 N. The SAIJ125X70-10-S is chosen over a fixed-stroke SAI when a machine requires a variable end-stop to dial in the exact 60-70 mm travel distance during setup or product changeover. For a direct ISO 15552 replacement match, verify the 125 mm bore, 70 mm stroke, 10 mm adjustment, PT ports, and the -S magnet requirement.
Because the rear adjuster acts purely as a mechanical travel stop and the air cushions only manage deceleration, this cylinder cannot hold a load without continuous live air pressure. If your setup demands true load-holding capability without pneumatic pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
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 SAIJ125X70-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it achieves a top push force of 8590 N.
The rear adjuster screw allows you to shorten the nominal 70 mm stroke by up to 10 mm, creating a usable travel window of 60 to 70 mm. This mechanical stop fine-tunes the end position but does not lock the load without live air pressure.
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 SAIJ125X70-10S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.