Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S
The AirTAC SAIJ125X800-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, utilizing a 32mm carbon steel rod with an M27x2 thread. Because of the 75mm adjustment code, the effective travel window can be fine-tuned anywhere between 725mm and 800mm without swapping the unit.
This adjustable-stroke design allows you to dial in the exact retract end-position at commissioning or during product changeovers, eliminating the need for external stops. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet operates directly with AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid must be filtered to 40 um, and the standard PT tapered port threads match the G1/2 port size.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAIJ125X800-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125X800-75S Is Used
Product Changeover
Rapidly reconfigure the retract distance from 800mm down to 725mm on packaging lines when switching to a different pallet or product size.
End-Position Tuning
Fine-tune the exact stopping point of heavy 6136N thrust loads during machine commissioning without machining external stopper blocks.
Variable End Stops
Provide flexible end-of-stroke positioning for automated assembly equipment requiring periodic adjustments to the final retract location.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-75S the Right Cylinder?
Choose this 125mm bore when a 100mm bore (providing 3927N push at 0.5 MPa) lacks the necessary thrust, but you want to avoid stepping up to a 160mm bore. The 75mm rear adjuster acts purely as a mechanical stop to set the travel window; it does not lock or hold the load without live air pressure. For load-holding requirements without continuous air, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. To replace an ISO 15552 cylinder, match the 125mm bore, 800mm stroke, PT port threads, and the -S magnet.
With an 800mm stroke, the 32mm rod is subject to increased side-loading risks if the load is unsupported. Always guide the load externally to prevent binding. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. The operating speed range is 30-500 mm/s.
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 SAIJ125X800-75S FAQ
At 0.5 MPa operating pressure, this cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw lets you shorten the effective stroke by up to 75mm, creating a usable travel window between 725mm and 800mm. It functions as a travel stop and does not hold the load without live air.
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 SAIJ125X800-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.