Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X85-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S
The AirTAC SAIJ125X85-30-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 55 to 85 mm without adding external stops. The carbon steel rod and M27x2 thread provide robust resistance to side loads, while the PT tapered port ensures a tight, reliable pneumatic seal.
Because this unit includes a magnet (-S), it integrates seamlessly with AirTAC CMSE reed and DMSE electronic sensors mounted into the dual-sided extruded barrel grooves. The rear adjuster acts purely as a mechanical stop to decelerate the end-of-stroke position, so you must maintain live air pressure to hold a load. For true drop-prevention holding, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAIJ125X85-30S Is Used
Variable End-Stop Positioning
Dial in the 55 to 85 mm travel window during machine setup to accommodate varying part dimensions without physically swapping cylinders.
Heavy-Duty Changeover
Use the rear screw to rapidly adjust the retract end-position on production lines processing different product sizes, reducing commissioning time.
Sensor-Integrated Assembly
Leverage the built-in magnet with DMSE solid-state sensors to confirm end-stroke positions in automated assembly lines requiring heavy thrust.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-30S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is oversized. The 30 mm adjustment range is ideal for product changeovers where the exact end position varies slightly, saving you from swapping out a fixed-stroke SAI cylinder. When replacing an ISO 15552 unit, match the 85 mm stroke, 30 mm adjuster, PT G1/2 port, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125X85-30S FAQ
At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw lets you shorten the nominal 85 mm stroke by up to 30 mm, creating a usable travel window of 55 to 85 mm. The adjuster functions as a mechanical stop and does not lock the load without live air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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