Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-75 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 SAIJ125AX800-75
The AirTAC SAIJ125X800-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This yields a usable end-position window of 725 to 800 mm, letting you dial in the exact retract distance during commissioning without swapping out the actuator or adding external stops. It delivers a robust 6136 N push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa.
This unit is built with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later. Remember that the rear adjuster acts purely as a travel stop, not a lock, so it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-75 |
|---|---|
| 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 SAIJ125AX800-75
| 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 SAIJ125AX800-75 Is Used
Product Changeover
Quickly adjust the retract end-stop from 725 to 800 mm to accommodate different product lengths on a packaging line without changing the cylinder.
Machine Setup
Fine-tune the final end position during commissioning to achieve precise mechanical alignment, avoiding the need for external shims or stopper blocks.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or workpieces, using the adjustable stroke to set the exact resting position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-75 the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) lacks the thrust for heavy positioning, but a 160 mm bore (10053 N) would be excessive. The adjustable 725 to 800 mm travel window is ideal for machinery that requires precise end-stop tuning during product changeovers, eliminating the need to maintain multiple fixed-stroke SAI cylinders for slightly different setups. If your application requires the load to be held mechanically without continuous air pressure, you must integrate an external rod lock or look at the SAIL or BSAI series.
Because this cylinder features an 800 mm stroke, the 32 mm rod diameter and M27x2 rod thread will still experience leverage forces at full extension. An external guide mechanism is highly recommended to prevent excessive side-loading on the piston rod. This model uses PT ports and supports the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX800-75 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the 800 mm nominal stroke by up to 75 mm, providing an adjustable travel window between 725 mm and 800 mm. This acts as a mechanical stop and does not lock the load without 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 SAIJ125AX800-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.