Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S
The AirTAC SAIJ125X900-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 890-900 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU includes the -S magnet, it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection.
This model features a 32 mm carbon steel piston rod with an M27x2 thread, paired with PT tapered port threads and a 40 mm cushion length to manage kinetic energy at the travel ends. The rear adjuster acts purely as a mechanical stop to fine-tune the retraction point during commissioning; it does not lock or hold the load without live air pressure. For applications requiring true load-holding, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125X900-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125X900-10S Is Used
Machine Setup Tuning
Dial in the exact 890-900 mm retraction end-stop during initial commissioning to perfectly align heavy fixtures without machining custom spacer plates.
Product Size Changeover
Quickly trim the stroke by up to 10 mm on packaging lines when switching to a slightly different pallet or container size, minimizing downtime.
Heavy Material Positioning
Leverage the 6136 N push force at 0.5 MPa to push heavy workpieces into precise machining stations while relying on the internal cushioning to absorb impact.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-10S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N push at 0.5 MPa) lacks the necessary thrust, but before stepping up to a 160 mm bore (10053 N push). The 10 mm adjustment range is ideal for applications needing slight end-position tuning during machine setup or product changeover without adding external stops. Because the total stroke is 900 mm, the long unsupported piston rod requires an external guide to prevent excessive side-loading and premature seal wear.
To match this ISO 15552 interchangeable cylinder, verify the 125 mm bore, 900 mm stroke, 10 mm adjustment, PT port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. Operating speed for this bore size ranges from 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 SAIJ125X900-10S 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 0.7 MPa, the push force increases to 8590 N.
The rear mechanical adjuster allows you to shorten the 900 mm nominal stroke by up to 10 mm, creating an effective travel window of 890-900 mm. It functions as a travel stop for fine-tuning and does not lock the load without continuous air pressure.
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